Balance-equation method for simulating terahertz quantum-cascade lasers using a wave-function basis with reduced dipole moments of tunnel-coupled states

Ушаков, Д. В.; Афоненко, А. А.; Dubinov, A. A.; Гавриленко, В. И.; Volkov, O. Yu.; Shchavruk, N. V.; Пономарев, Д. С.; Хабибуллин, Р. А.

doi:10.1070/qel17068

Cited by 16 publications

(10 citation statements)

References 25 publications

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“…The population of the subbands was found by solving the system of balance equations. [9,19] At the chosen doping profile, the amplitude of the modulation potential created by the electrons "flowing" into the QWs and the remaining ionized injector impurities was about 30 meV (Figure 3). The composition and thicknesses of the QWs were chosen so that 1) their lower levels remained unoccupied in the equilibrium state; 2) the resonance absorption from the upper laser level to the higher subband of the QW had a shorter wavelength (8.8 μm) than the generation wavelength (9.2 μm).…”

Section: Results Of the Modelingmentioning

confidence: 99%

HgCdTe‐Based Noncascaded Intersubband Injection Laser

Афоненко

Ушаков

Fadeev

et al. 2023

Physica Status Solidi (a)

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Herein, the possibility of creating a noncascade intersubband midinfrared injection laser based on HgCdTe with a minimum number of quantum wells is analyzed. An error‐tolerant laser structure with three quantum wells that is insensitive to the variations in the quantum well thickness is proposed. The calculations predict a modal gain of 35 cm−1 at the wavelength of approximately 9.2 μm at 77 K and the operating temperature up to 125 K.

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Section: Results Of the Modelingmentioning

confidence: 99%

HgCdTe‐Based Noncascaded Intersubband Injection Laser

Афоненко

Ушаков

Fadeev

et al. 2023

Physica Status Solidi (a)

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“…The details of the calculation method tested on GaAs/AlGaAs heterostructure and a comparison of the calculations with experimental results showing good agreement can be found in refs. [30,31].…”

Section: Structures Design and Modelingmentioning

confidence: 99%

Phosphides‐Based Terahertz Quantum‐Cascade Laser

Ushakov,

Afonenko,

Khabibullin

et al. 2024

Physica Rapid Research Ltrs

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Due to their high optical phonon energies GaInP/AlGaInP heterostructures are a promising active medium to solve the problem of creating compact semiconductor sources with an operating frequency range of 5.5‐7 THz. In this work, the temperature dependences of gain and absorption at 6.4‐6.9 THz have been calculated for a GaInP/AlGaInP‐based quantum‐cascade laser (QCL) with two quantum wells in the cascade and a metal‐metal waveguide. The dielectric function and mode losses for a 10 μm thick Au‐Au waveguide, based on ternary InGaP and quaternary AlGaInP semiconductors, have been investigated in details. We propose a laser structure that provides a mode gain of over 100 cm‐1 with a maximum operating temperature about 100 K. The results of this study open the way to the development of a QCL for operation in a significant part of the GaAs phonon absorption band region, which is inaccessible for existing QCLs.This article is protected by copyright. All rights reserved.

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“…Ushakov et al introduced a balance-equation method for simulating THz QCLs using a wave-function basis [370]. Dephasing was taken into account and the current-voltage and power characteristics were calculated.…”

Section: Quantum Cascade Devicesmentioning

confidence: 99%

Computational perspective on recent advances in quantum electronics: from electron quantum optics to nanoelectronic devices and systems

Weinbub

Kosik

2022

J. Phys.: Condens. Matter

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Quantum electronics has significantly evolved over the last decades. Where initially the clear focus was on light-matter interactions, nowadays approaches based on the electron's wave nature have solidified themselves as additional focus areas. This development is largely driven by continuous advances in electron quantum optics, electron based quantum information processing, electronic materials, and nanoelectronic devices and systems. The pace of research in all of these areas is astonishing and is accompanied by substantial theoretical and experimental advancements. What is particularly exciting is the fact that the computational methods, together with broadly available large-scale computing resources, have matured to such a degree so as to be essential enabling technologies themselves. These methods allow to predict, analyze, and design not only individual physical processes but also entire devices and systems, which would otherwise be very challenging or sometimes even out of reach with conventional experimental capabilities. This review is thus a testament to the increasingly towering importance of computational methods for advancing the expanding field of quantum electronics. To that end, computational aspects of a representative selection of recent research in quantum electronics are highlighted where a major focus is on the electron's wave nature. By categorizing the research into concrete technological applications, researchers and engineers will be able to use this review as a source for inspiration regarding problem-specific computational methods.

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Balance-equation method for simulating terahertz quantum-cascade lasers using a wave-function basis with reduced dipole moments of tunnel-coupled states

Cited by 16 publications

References 25 publications

HgCdTe‐Based Noncascaded Intersubband Injection Laser

HgCdTe‐Based Noncascaded Intersubband Injection Laser

Phosphides‐Based Terahertz Quantum‐Cascade Laser

Computational perspective on recent advances in quantum electronics: from electron quantum optics to nanoelectronic devices and systems

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