Relevant bibliographies by topics / Exciton absorption band

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Exciton absorption band'

Author: Grafiati
Published: 28 May 2022
Last updated: 31 July 2025

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Journal articles on the topic "Exciton absorption band"

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Heckotter, J., M. Freitag, M. Abmann, et al. "Critical dependence of the excitonic absorption in cuprous oxide on experimental parameters." Физика твердого тела 60, no. 8 (2018): 1584. http://dx.doi.org/10.21883/ftt.2018.08.46251.19gr.

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AbstractWe study the modification of the exciton absorption in cuprous oxide by the presence of free carriers excited through above band gap excitation. Without this pumping, the absorption spectrum below the band gap consists of the yellow exciton series with principal quantum numbers up to more than n = 20, depending on the temperature, changing over to an about constant, only slowly varying absorption above the gap. Careful injection of free carriers, starting from densities well below 1 μm^–3, leads to a reduction of the band gap through correlation effects. The excitons in the Rydberg reg
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ITOH, T., K. YAMANAKA, K. EDAMATSU, T. UOZUMI, and Y. KAYANUMA. "PHOTOPHYSICS OF CONFINED EXCITONS IN CuCl NANOPARTICLES - CONFINEMENT OF EXCITON EXCITED STATES -." International Journal of Modern Physics B 15, no. 28n30 (2001): 3569–73. http://dx.doi.org/10.1142/s0217979201008172.

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Exciton excited states of CuCl nanoparticles dispersed in NaCl matrix have been investigated by means of two-photon excitation and two-step IR transient absorption. In the two-photon excitation spectra, there appears a distinct absorption edge. As the particle radius decreases from 6.3nm to 1.6nm, the edge energy increases by about 0.15eV, more than twice as large as that of the lowest 1S state. The fast decay component of the IR transient absorption under pulsed excitation of the lowest 1S exciton shows a broad band which shifts from 0.2 to 0.4eV as the radius decreases from >10nm to 1.4nm
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Cheng, Zhiqiang, Xiaoyou Niu, Shenlong Jiang, and Qun Zhang. "State-selective exciton–plasmon interplay in a hybrid WSe2/CuFeS2 nanosystem." Journal of Chemical Physics 156, no. 14 (2022): 144701. http://dx.doi.org/10.1063/5.0090467.

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The integration of confined exciton and localized surface plasmon in a hybrid nanostructure has recently stimulated extensive interests. The mechanistic insights into the elusive exciton–plasmon interplay at the nanoscale are of both fundamental and applicable values. Herein, by taking a hybrid WSe2/CuFeS2 system as a prototype, in which the excitonic semiconductor WSe2 nanosheets are interfaced with the plasmonic semiconductor CuFeS2 nanocrystals to form a heterostructure, we design and perform an ultrafast dynamics study to glean information in this regard. Specifically, the band-alignment r
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KAJITA, MASAKAZU, MAKOTO SHIMIZU, ARUP NEOGI, and TERUYA ISHIHARA. "ULTRAFAST PHOTO-INDUCED ABSORPTION CHANGE IN INORGANIC-ORGANIC MUTIPLE QUANTUM WELL COMPOUND." International Journal of Modern Physics B 15, no. 28n30 (2001): 3741–44. http://dx.doi.org/10.1142/s021797920100855x.

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We have performed pump-and-probe measurements to investigate ultrafast excitonic non-linearity expected in an inorganic-organic compound (C6H5C2H4NH3)2PbI4 , which has huge exciton binding energy (220 meV) and oscillator strength (0.5 per formula unit) by virture of the small dielectric constant in the barrier layer (the dielectric confinement or image charge effect). When the pump photon energy is set at the exciton level at 2.37 eV or above the band gap, the absorption decreases immediately after the pump due to the phase space filling effect and retrieves in a few ps. The retrieval time is
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Kovalenko, E. N., O. N. Yunakova, and N. N. Yunakov. "Exciton absorption spectrum of K2CuCl3 thin films." Low Temperature Physics 51, no. 4 (2025): 506–8. https://doi.org/10.1063/10.0036246.

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The absorption spectrum of a thin K2CuCl3 film was studied in the spectral region of 2–6 eV and the temperature range of 90–333 K. The analysis of the spectrum revealed the cationic nature of excitons in the K2CuCl3 compound. The exciton spectrum of K2CuCl3 is interpreted based on transitions in the Cu+ ion. The one-dimensional character of excitons in K2CuCl3 is determined from the temperature dependence of the broadening of the Г(T) intense long-wave exciton band A.
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GÖPPERT, M., R. BECKER, C. MAIER, M. JÖRGER, A. JOLK, and C. KLINGSHIRN. "INFRARED ABSORPTION BY EXCITONS IN CUPROUS OXIDE." International Journal of Modern Physics B 15, no. 28n30 (2001): 3615–18. http://dx.doi.org/10.1142/s0217979201008275.

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We report on the first observation of the 1s to 2p exciton transition in a direct gap semiconductor. Cuprous oxide is well known for its excitonic features which provide a model case for the theory of Wannier excitons. In our pump-probe experiment we measured the infrared transmission of cuprous oxide with the without Ar +-laser illumination. The observed photo-induced absorption line in the differential transmission spectra at 126 meV is assigned to the excitonic transition from 1s to 2p exciton levels i.e. to the analog of the Lyman series in atomic hydrogen. From the dependence of the integ
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Ran, Xing, Xin Xiang, Feng Zhou, and Shunbin Lu. "Exciton-Resonance-Enhanced Two-Photon Absorption in Three-Dimensional Hybrid Organic–Inorganic Perovskites." Photonics 12, no. 3 (2025): 261. https://doi.org/10.3390/photonics12030261.

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Three-dimensional (3D) hybrid organic–inorganic perovskites (HOIPs) have attracted tremendous interest due to strong excitonic effects and large optical nonlinearities. Taking the advantages, 3D HOIPs show great potential for applications in excitonic and nonlinear devices. However, understanding the relevant mechanisms of exciton-associated nonlinear optical phenomena in 3D perovskites is still challenging. Here, we apply the quantum perturbation theory to calculate the exciton-associated degenerate 2PA spectra of 3D HOIPs. The calculated 2PA spectra of twelve 3D HOIPs are predicted to exhibi
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Ratner, A. M. "Anomalous multiphonon scattering of intermediate radius excitons." Soviet Journal of Low Temperature Physics 11, no. 4 (1985): 222–27. https://doi.org/10.1063/10.0031276.

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In contrast to previous works which studied the effects of single-phonon scattering, we have studied multiphonon scattering of broadband excitons, related to the transformation of them into local excitations. The integrated cross section for such scattering as a function of exciton energy reproduces the absorption band of the local center and becomes anomalously strong in the central region of the band where a peak appears in the exciton dispersion curve.
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Maşnic, Alisa. "BIREFRINGENCE AND EXCITON SPECTRA OF CuAlSe2 AND CuAlS2 CRYSTALS." Journal of Engineering Science XXVII (1) (March 15, 2020): 23–27. https://doi.org/10.5281/zenodo.3713358.

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The excitonic reflection spectra of CuAlS<sub>2</sub> and CuAlSe<sub>2</sub> crystals were measured at the temperature of 10 K for polarizations<em> E||c </em>and <em>E</em><em>&perp;c</em>. Ground and excited states of the excitons were found out in the investigated spectra. Symmetries of the observed excitons were determined.&nbsp; The shapes of ground states lines of<em> </em><em>Г<sub>4 </sub></em>and<em> </em><em>Г<sub>5 </sub></em>excitons were calculated by means of the Kramers-Kronig relations. Exciton parameters and values of energetic gaps (Г<sub>7</sub>-Г<sub>6</sub>, Г<sub>6</sub>-
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Golineĩ, I. Yu, and V. I. Sugakov. "Optical properties of metals with helium crystallized in their pores." Soviet Journal of Low Temperature Physics 11, no. 7 (1985): 427–28. https://doi.org/10.1063/10.0031330.

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The absorption of electromagnetic waves at low temperatures in metals filled with helium has been studied theoretically in the region of the atomic helium 1S0–21P1 transition. It is suggested that as a result of the high pressure the helium in the pores exists in the crystallized form and its excited states are excitons. The permittivity of a medium containing pores with helium has been found. The frequency dependence of the absorption contains maxima produced by the discrete nature of the exciton spectrum in a pore. The most intense resonances in the absorption occur for those discrete levels
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Dissertations / Theses on the topic "Exciton absorption band"

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Babkina, A. N., P. S. Shirshnev, B. A. Tsekhomsky, and N. V. Nikonorov. "Temperature Effect on Exciton Absorption of CuBr Nanocrystals in Potassium-aluminaborate Glass." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35429.

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The paper describes the research of temperature effect of potassium-alumina-borate (PAB) glass with CuBr nanocrystals, which was obtained in optical wavelength region for the first time. Temperature dependence of optical density at different wavelengths was examined. Melting and crystallization temperatures were evaluated for different nanocrystals sizes. Great changes of exciton absorption band influenced by temperatures below 100°C were recorded. Propositions for studied glass application as tunable filters in electro-optic circuit were suggested. When you are citing the document, use t
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Haas, Helge. "Effet Stark quantique dans les puits de CdTe/CdZnTe et développement d'un dispositif photoréfractif." Université Joseph Fourier (Grenoble ; 1971-2015), 1995. http://www.theses.fr/1995GRE10146.

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Nous presentons le developpement et l'etude d'un dispositif photorefractif a puits quantiques ainsi que les mecanismes physiques fondamentaux associes a ce type de composants. La structure de bande de type i pour les trous lourds et de type ii pour les trous legers permet une mesure precise du decalage de bande de valence de cdte/cd#. #7#2zn#0#. #3#8te egal a +11% 2%. Cette situation particuliere produit une degenerescence entre niveaux de trous lourds et trous legers. Dans les puits peu profonds, l'exciton leger est de type i grace au potentiel coulombien exerce par l'electron sur le trou leg
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Dal'Bo, Frédéric. "Spectroscopie optique d'heterostructures a base de tellurure de cadmium epitaxiees par jets moleculaires." Grenoble 1, 1988. http://www.theses.fr/1988GRE10123.

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La relaxation des contraintes est mise en evidence par une etude spectroscopique des transitions des excitons libres et varie en fonction de l'epaisseur de la couche et de l'orientation du support. Les differences entre les spectres de photoluminescence des materiaux massifs et ceux des couches epitaxiees sont dues aux effets des contraintes, aux defauts cristallins et aux impuretes introduites pendant la croissance. La structure de bande du puits quantique contraint est etudiee par spectroscopie optique. Elle est etudiee en fonction de l'epaisseur du puits
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Roden, Jan. "Lichtabsorption und Energietransfer in molekularen Aggregaten." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-68387.

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Aggregate aus Molekülen, in denen die Moleküle über ihre elektronischen Übergangsdipole miteinander wechselwirken, finden wegen ihrer besonderen optischen und Energietransfer-Eigenschaften vielfach Anwendung in Natur, Technik, Biologie und Medizin. Beispiele sind die wechselwirkenden Farbstoffmoleküle, die in den Lichtsammelkomplexen Photosynthese betreibender Lebewesen Sonnenlicht absorbieren und die Energie als elektronische Anregung hocheffizient zu Reaktionszentren weiterleiten, oder Aggregate aus tausenden von organischen Farbstoffmolekülen in einem flüssigen Lösungsmittel. Die Wechselwir
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Roden, Jan. "Lichtabsorption und Energietransfer in molekularen Aggregaten." Doctoral thesis, Max-Planck-Institut für Physik komplexer Systeme, 2010. https://tud.qucosa.de/id/qucosa%3A25573.

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Aggregate aus Molekülen, in denen die Moleküle über ihre elektronischen Übergangsdipole miteinander wechselwirken, finden wegen ihrer besonderen optischen und Energietransfer-Eigenschaften vielfach Anwendung in Natur, Technik, Biologie und Medizin. Beispiele sind die wechselwirkenden Farbstoffmoleküle, die in den Lichtsammelkomplexen Photosynthese betreibender Lebewesen Sonnenlicht absorbieren und die Energie als elektronische Anregung hocheffizient zu Reaktionszentren weiterleiten, oder Aggregate aus tausenden von organischen Farbstoffmolekülen in einem flüssigen Lösungsmittel. Die Wechselwir
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Book chapters on the topic "Exciton absorption band"

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Müller, W., H. Piazena, and Peter Vaupel. "From Sun to Therapeutic wIRA." In Water-filtered Infrared A (wIRA) Irradiation. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92880-3_2.

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AbstractLife on Earth is significantly influenced by the electromagnetic radiation of the sun. Its energy most probably stimulated physical/chemical processes and has been used by living organisms for further development during evolution. The radiation is generated by nuclear fusion in the core of the sun and emitted into space with a wide range of different wavelengths. The terrestrial spectrum of this radiation shows characteristic absorption bands caused by atmospheric gases, mainly by water vapor, carbon dioxide, and ozone. The water molecules are excited by the absorption of preferentiall
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McBranch, D. W., and M. B. Sinclair. "ULTRAFAST PHOTOINDUCED ABSORPTION IN NONDEGENERATE GROUND-STATE CONJUGATED POLYMERS: SIGNATURES OF EXCITED STATES." In Primary Photoexcitations in Conjugated Polymers: Molecular Exciton Versus Semiconductor Band Model. WORLD SCIENTIFIC, 1998. http://dx.doi.org/10.1142/9789814447201_0020.

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"Luminescence and energy transfer processes in Ca3Ga2Ge3O12:Bi,Eu." In Book of Abstracts - RAD 2025 Conference. RAD Centre, Niš, Serbia, 2025. https://doi.org/10.21175/rad.abstr.book.2025.16.10.

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The interest in Bi3+-doped compounds increased drastically in recent years due to their possible applications as scintillator and phosphor materials suitable for X-ray screens, white light- emitting diodes, solar cells, dosimeters, etc. The compounds co-doped with Bi3+ and different trivalent rare-earth (RE3+) ions were found to be potentially applicable as spectral converters for solar cells and solid-state light sources of new generation, so-called white light-emitting diodes (WLED), owing to strong absorption in the ultraviolet spectral region, intense broad visible Bi3+- related emission b
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Calvert, Jack, Abdelwahid Mellouki, John Orlando, Michael Pilling, and Timothy Wallington. "Mechanisms of Photodecomposition of the Sunlight-Absorbing Oxygenates." In Mechanisms of Atmospheric Oxidation of the Oxygenates. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780199767076.003.0012.

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In this chapter we consider the chemical changes induced by absorption of sunlight by oxygenated organic compounds. In contrast to the hydrocarbons, sunlight absorption by the oxygenated products of hydrocarbon oxidation shows a shift in absorption to the longer wavelengths such that their photodecompositions can become important atmospheric processes. This is illustrated in the absorption data given for methane and its oxidation products in figure IX-A-1. As a H3C—H bond in methane is replaced with a H3C—OH bond (alcohols), H3C—OCH3 bond (ethers), or H3C—O2H bond (hydroperoxides), light absor
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Ulbrich, R. G. "DENSE NONEQUILIBRIUM EXCITONS: BAND EDGE ABSORPTION SPECTRA OF HIGHLY EXCITED GALLIUM ARSENIDE." In Optical Nonlinearities and Instabilities in Semiconductors. Elsevier, 1988. http://dx.doi.org/10.1016/b978-0-12-332915-8.50009-x.

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Henderson, B., and G. F. Imbusch. "Experimental techniques." In Optical Spectroscopy of Inorganic Solids. Oxford University PressOxford, 2006. http://dx.doi.org/10.1093/oso/9780199298624.003.0006.

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Abstract Tms book is concerned with the optical properties of inorganic solids which have a measurable forbidden energy gap between the valence and conduction bands. The bandgap may be small, as in some semiconductors, or large, as in materials such as diamond and aluminium oxide. Both impurity ions and defects may have energy levels in the gap, and transitions may be excited between these gap levels or between band states and the gap levels. Many experimental techniques have been used to investigate such transitions, those of longest standing being optical absorption spectroscopy and photolum
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Gaponenko, S. V., I. N. Germanenko, V. P. Gribkovskii, L. G. Zimin, V. Yu Lebed, and I. E. Malinovskii. "Nonlinear absorption and photoluminescence of CuCl crystallites under size quantization of excitons." In Wide-Band-Gap Semiconductors. Elsevier, 1993. http://dx.doi.org/10.1016/b978-0-444-81573-6.50096-7.

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Kusmartsev, F. V. "The Narrow Bands of Exciton Absorption in Polar Solids and Alloys." In October 1. De Gruyter, 1985. http://dx.doi.org/10.1515/9783112495384-025.

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"Up-conversion luminescence and energy levels structure of CsPbCl3:Yb,Nd single crystals." In Book of Abstracts - RAD 2025 Conference. RAD Centre, Niš, Serbia, 2025. https://doi.org/10.21175/rad.abstr.book.2025.30.7.

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A key factor in utilizing materials as efficient detectors of high-energy quanta (X- and γ-ray ranges) is a high effective atomic number. Lead-containing alkali-halide perovskites belong to this class of compounds, which also exhibit a direct bandgap and a significant diffusion length-lifetime product for photoionized charge carriers. Additionally, these crystals are characterized by low phonon energy, which enhances the probability of radiative transitions during the relaxation of electronic excitations. These properties enable the development of current-mode electromagnetic radiation detecto
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Robbins, D. J., and P. Day. "Temperature variation of exciton–magnon absorption bands in metamagnetic transition-metal dihalides." In Molecules Into Materials. WORLD SCIENTIFIC, 2007. http://dx.doi.org/10.1142/9789812706836_0028.

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Conference papers on the topic "Exciton absorption band"

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Johnson, Anthony M. "Femtosecond Exciton Dynamics of II-VI Semiconductor Multiple Quantum Wells (Invited)." In Inaugural Forum for the Research Center for Optical Physics. Optica Publishing Group, 1993. http://dx.doi.org/10.1364/rcop.1993.tpls2.

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Room temperature excitonic absorption peaks have been difficult to observe in II-VI semiconductors and has been attributed to strong exciton-phonon interactions. The first well-defined room temperature excitonic absorption peaks were measured in CdZnTe/ZnTe multiple quantum wells (MQWs), grown by molecular beam epitaxy on GaAs substrates. We report the first direct measurement of the relative bleaching strength of room temperature excitonic absorption by "cool" free or ionized electron-hole (e-h) pairs and "cold" excitons. In these II-VI MQWs, the exciton binding energy (E b x ≈23meV), the lon
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Von Lehmen, A. C. "Modulation of exciton absorption by below band gap excitation: optical Stark effect." In OSA Annual Meeting. Optica Publishing Group, 1986. http://dx.doi.org/10.1364/oam.1986.thb2.

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Optical pumping in the transparent region of GaAs quantum well heterostructures produces modulation of the exciton absorption by two distinct physical mechanisms. First, photoexcitation below the band gap can produce carriers at the bandedge via phonon-assisted absorption. These carriers bleach the exciton through the effects of the exclusion principle. We have utilized this mechanism in studies of the phonon sidebands of the exciton in quantum well heterostructures. In contrast, the second mechanism is a direct interaction between the optical field and the exciton and involves no exciton or f
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Small, Gerald J. "Hole-Burning in Biological Systems." In Spectral Hole-Burning and Luminescence Line Narrowing: Science and Applications. Optica Publishing Group, 1992. http://dx.doi.org/10.1364/shbl.1992.tua2.

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Understanding the excited state electronic structure, optical excitation (energy) transfer and primary charge separation in photosynthetic protein-chlorophyll complexes represents an important but formidable problem [1]. At the outset it is important to realize that the protein, as a host for the various pigments (cofactors), is glass-like, meaning that the optical absorption bands of pigments such as chlorophylls (Chl) suffer from significant site inhomogeneous broadening (ΓI). For Chl and pheophytin cofactors the absorption band of primary interest is the origin or (0,0) band of the lowest e
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Wilson, William L., M. Bawendi, L. Rothberg, T. Jedju, L. Brus, and M. L. Steigerwald. "Absorption Saturation Dynamics in Capped CdSe Microcrystallites Exhibiting Quantum Confinement." In International Conference on Ultrafast Phenomena. Optica Publishing Group, 1990. http://dx.doi.org/10.1364/up.1990.thc10.

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Restriction of carrier wave functions in semiconductor structures of reduced dimensionality results in increased oscillator strength in the excitonic absorption which can be exploited in the design of novel nonlinear optical devices[1]. We report transient bleaching studies of CdSe "quantum dots" whose size is small relative to the bulk material exciton radius. Subpicosecond hole burning and steady-state luminescence spectroscopies are used to characterize the spectral dynamics and isolate the single particle spectrum of these 45 Å diameter CdSe microcrystallites. These clusters, which are gro
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Vardeny, Z. V. "Exciton Dynamics, Laser Action, and Cooperative Emission in Conducting Polymer Thin Films." In Quantum Optoelectronics. Optica Publishing Group, 1997. http://dx.doi.org/10.1364/qo.1997.qfd.2.

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Picosecond dynamics of exciton emission and absorption have been studied in neat thin films of a variety of poly (phenylene-vinylene) derivatives. We found that the stimulated emission band of 120 nm width and ~ 1 ns duration, which is observed at low exciton density, n, collapses at n &gt; 1017cm-3 into a much narrower band of 7 nm width and lifetime τ « 10 ps. Based on its excitation intensity dependence, polarization, lifetime, illuminated area, and film thickness dependencies, we assign this narrow band to superfluorescence rather than to amplified spontaneous emission.
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Kramar, N. K., V. M. Kramar, and Yu M. Kachmarskii. "Temperature genesis of an exciton absorption band in 2H- and 4H-politypes of PBI2." In SPIE Proceedings, edited by Oleg V. Angelsky. SPIE, 2006. http://dx.doi.org/10.1117/12.679946.

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Kennis, John T. M., Alexandre M. Streltsov, Thijs J. Aartsma, Jan Amesz, and Tsunenori Nozawa. "Delocalized states in isolated B800-850 complexes of the photosynthetic purple bacterium Chromatium tepidum." In International Conference on Ultrafast Phenomena. Optica Publishing Group, 1996. http://dx.doi.org/10.1364/up.1996.tue.18.

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This work concerns a study by time-resolved femtosecond spectroscopy on isolated B800-850 complexes of the purple bacterium Chromatium tepidum. The results provide direct evidence that the B850 absorption band is associated with a transition to a delocalized exciton state.
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Chang, Gui-Fen J. J., Gen-Yuan Ma, and Guang-In Zhang. "MoS2 photoexcited as exciton peaks at room temperature." In OSA Annual Meeting. Optica Publishing Group, 1988. http://dx.doi.org/10.1364/oam.1988.wk4.

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The maybe superconductive and optobistable 2H MoS2 compound was first studied by a photoacoustic spectroscopic method at room temperature. Our PAS measurements were performed on a conventional PAS set with particular protection against thermal and vibrational disturbances. The incident light from a 250-W sodium lamp through a monochromator fell on the MoS2 cleavage surface of an ~50-μm thick sample, which was stuck to a piezoelectric ceramic sensor, in the measuring wavelength range from 540 to 740 nm at room temperature. We obtained three strong peaks at the absorption edge, namely, 595 nm (2
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Zhao, Yang, Pankaj Shah, Qingfeng Tang, and L. Ralph Dawson. "Nonlinear absorption and wave mixing in InGaAs/GaAs strained layer MQWs at 1.06 µm wavelength." In OSA Annual Meeting. Optica Publishing Group, 1992. http://dx.doi.org/10.1364/oam.1992.wb5.

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There are a number of advantages of using a multiple quantum well (MQW) for nonlinear optical devices at 1.06 µm wavelength.1 InGaAs/AlAs MQWs are good candidates for this wavelength. We fabricated these MQWs with different structures by using the MBE technique. The parameters of the samples were selected to have the exciton peak near 1.06 µm. One sample was grown on an InGaAs buffer layer to relieve the strain. Others were grown on GaAs substrate. After the processing of the samples, the linear absorption spectrum was measured with a commercial infrared spectrometer. The results showed the ex
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Bradley, P. J., R. Calvani, D. Campi, R. Caponi, and G. Morello. "Exciton quenching in strained InGaAs/InP MQWs for Fabry-Perot modulators." In OSA Annual Meeting. Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oam.1991.mff4.

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Multiple quantum wells (MQWs) exhibit large optical nonlinearities associated with saturation of excitonic transitions at the band edge. Here we present a study of nonlinear absorption and refraction in an InGaAs/InP MQW structure, for the design of an all-optical reflection modulator. The sample, grown by SBE, consists of sixty periods of 77 Å InGaAs wells and 70 Å InP barriers, sandwiched between two 0.5-μm InP buffers. The wells are affected by a tensile strain due to a 0.5% lattice mismatch. In the experiment, a cw Nd:YAG pump and a white light probe (tungsten lamp) are incident collinearl
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