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AbstractAbstract
[en] Quantum-confinement levels in a CdxHg1−xTe-based rectangular quantum well are calculated in the framework of the four-band Kane model taking into account mixing between the states of electrons and three types of holes (heavy, light, and spin-split holes). Comparison of the calculation results with experimental data on the photoluminescence of CdxHg1−xTe-based quantum wells suggests that optical transitions involving the conduction and light-hole bands are possibly observed in the spectra.
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Copyright (c) 2012 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
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AbstractAbstract
[en] Quantum well (QW) population effects are compared in III-nitride light emitters with different levels of polarity. We show that wider nonpolar active QWs are characterized by increased QW transparency current and a reduced differential optical gain which consequently increases the laser threshold. We also show that high intra-QW recombination rates in nonpolar/semipolar structures make the QW populations strongly non-equilibrium and vulnerable to inhomogeneous QW injection. In the LED regime, structures with a different polarity level reveal different mechanisms of the efficiency droop. In polar structures, the droop is dominated by the electron leakage and is notably affected by the active region ballistic overshoot. The efficiency droop in semipolar/nonpolar structures is dominated by the combined effect of radiative time saturation and non-radiative Auger recombination
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Source
S0268-1242(12)05356-4; Available from http://dx.doi.org/10.1088/0268-1242/27/2/024012; Country of input: International Atomic Energy Agency (IAEA)
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AbstractAbstract
No abstract available
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Available from http://dx.doi.org/10.1070/PU1998v041n02ABEH000351; Abstract only; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Physics Uspekhi; ISSN 1063-7869;
; v. 41(2); p. 153-156

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An, Qi; Jin, Peng; Wang, Zhanguo; Lin, Jiandong, E-mail: pengjin@red.semi.ac.cn2011
AbstractAbstract
[en] A novel surface-emitting superluminescent diode (SLD) having a round active region surrounded by a circular grating is theoretically investigated. When the superluminescent light produced in the active region transmits to the passive region, it is coupled out of the device by the detuned circular grating, forming a symmetric surface-emitting beam that could not be obtained from previous devices. The calculation of the grating shows that a reflectivity below 10−3 can be achieved and is low enough to avoid lasing. Performances of devices using single and double quantum wells in the active regions have been simulated, which confirms feasibility of the new design, but also shows that the proposed SLD is unsuitable for high-power applications because of its relatively short length of gain compared to common stripe devices
Source
S0268-1242(11)88598-6; Available from http://dx.doi.org/10.1088/0268-1242/26/8/085036; Country of input: International Atomic Energy Agency (IAEA)
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Chen Jie; Zeng Weiyou, E-mail: jiechen2004@126.com, E-mail: zengwy_lx@huat.edu.cn2015
AbstractAbstract
[en] The coupling effects of quantum wells on band structure are numerically investigated by using the Matlab programming language. In a one dimensional finite quantum well with the potential barrier V_0, the calculation is performed by increasing the number of inserted barriers with the same height V_b, and by, respectively, varying the thickness ratio of separated wells to inserted barriers and the height ratio of V_b to V_0. Our calculations show that coupling is strongly influenced by the above parameters of the inserted barriers and wells. When these variables change, the width of the energy bands and gaps can be tuned. Our investigation shows that it is possible for quantum wells to achieve the desired width of the bands and gaps. (paper)
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Available from http://dx.doi.org/10.1088/1674-4926/36/10/102005; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Journal of Semiconductors; ISSN 1674-4926;
; v. 36(10); [4 p.]

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AbstractAbstract
[en] The results of studying edge-emitting quantum-well lasers with a layered design having coupled planar waveguides, capable of suppressing the generation of excited transverse modes, are presented. In this case, a low internal loss (0.4 cm–1) is provided, combined with a small depth (~0.9 μm) of the active region, which results in a low thermal resistance of 6.0 (K/W) mm without a submount.
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Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
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Faist, Jérôme
Joint Annual Meeting of the Austrian Physical Society and the Swiss Physical Society together with the Austrian and Swiss Societies for Astronomy and Astrophysics2013
Joint Annual Meeting of the Austrian Physical Society and the Swiss Physical Society together with the Austrian and Swiss Societies for Astronomy and Astrophysics2013
AbstractAbstract
[en] Full text: We have recently demonstrated comb operation of a mid-infrared quantum cascade lasers. This presentation will report on new progress towards the realization of a dual-comb spectrometer as well as on the realization of very broadband (covering close to an octave in frequency) THz QCL active regions. (author)
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Austrian Physical Society (Austria); Johannes Kepler University Linz, Altenberger Straße 69, 4040 Linz (Austria); vp; 2013; p. 110; Joint Annual Meeting of the Austrian Physical Society and the Swiss Physical Society together with the Austrian and Swiss Societies for Astronomy and Astrophysics; Gemeinsame Jahrestagung der Österreichischen Physikalischen Gesellschaft und der Schweizerischen Physikalischen Gesellschaft zusammen mit den Österreichischen und der Schweizerischen Gesellschaften für Astronomie und Astrophysik; Linz (Austria); 3-6 Sep 2013; Available in abstract form only, full text entered in this record. Available from: http://www.jku.at/conferences/content/e198715/; Available from: Johannes Kepler University Linz, Altenberger Straße 69, 4040 Linz (AT)
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AbstractAbstract
[en] The circular photogalvanic effect and the circular photon drag effect are observed and investigated in detail in (110)-grown quantum well structures. The experimental data are well described by phenomenological theory and microscopic models of both effects are developed being in agreement with experimental data
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S1367-2630(07)50100-X; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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New Journal of Physics; ISSN 1367-2630;
; v. 9(9); p. 349

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Bataev, M. N.; Filosofov, N. G.; Serov, A. Yu.; Agekyan, V. F.; Mohrain, C.; Kochereshko, V. P., E-mail: Vladimir.Kochereshko@mail.ioffe.ru2019
AbstractAbstract
[en] The name of the fifth author should read Mohrain.
Source
Copyright (c) 2019 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
Journal
Physics of the Solid State; ISSN 1063-7834;
; v. 61(3); p. 493

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AbstractAbstract
No abstract available
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Source
Available from http://dx.doi.org/10.1070/PU1998v041n02ABEH000341; Abstract only; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
Journal
Physics Uspekhi; ISSN 1063-7869;
; v. 41(2); p. 118-122

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