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Optically Pumped Terahertz Radiation Sources Based on Impurity Carrier Transitions in Quantum Wells
Ch. 2. P. 21-38.
A review of the results of studies of terahertz radiation associated with impurity electron transitions in n-doped GaAs/AlGaAs quantum wells under conditions of interband optical excitation of nonequilibrium charge carriers is presented.The principles of radiation generation and methods of controlling its intensity are described: a decrease in the lifetime of electrons at impurity levels due to stimulated interband radiation and the introduction of a compensating acceptor impurity.
Adamov R. B., Melentev G. A., Sedova I. V. et al., Journal of Luminescence 2024 Vol. 266 Article 120302
Terahertz (THz) luminescence in doped nanostructures with GaAs/AlGaAs quantum wells is studied under conditions of interband optical pumping. The study is carried out on compensated quantum wells with different doping profiles. In one structure, compensation is carried out directly in each quantum well by introducing donors and acceptors with the same concentration. In the other, ...
Added: November 12, 2023
Ivan S. Makhov, Panevin V., Vorobjev L. et al., , in : 2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz). : IEEE, 2021. P. 1-2.
Added: July 5, 2022
IEEE, 2021
The International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), begun in 1974, is the oldest and largest continuous forum specifically devoted to the field of ultra high frequency electronics and applications. In 2004 the original conference series – International Conference on Infrared and Millimeter Waves (IRMMW) joined up with the International Conference on THz ...
Added: July 5, 2022
Vinnichenko M., Makhov I., Panevin V. et al., , in : Proceedings of the 9th International Symposium OPTICS-2022. : Springer, 2022. Ch. 7. P. 79-90.
The present work is devoted to the experimental investigation of the far-, mid- and near-infrared photoconductivity related to the optical hole transitions involving acceptor states in GaAs/AlGaAs quantum wells.Photoconductivity spectra are studied at low lattice temperatures.It is shown that the main contribution to the far- and mid-infrared photoconductivity is associated with the optical hole transitions ...
Added: November 7, 2022
Vinnichenko M. Y., Makhov I., Kharin N. Y. et al., Semiconductors 2022 Vol. 55 No. 9 P. 710-716
The low-temperature impurity-assisted photoconductivity and absorption spectra of a nanostructure
with acceptor-doped multiple GaAs/AlGaAs quantum wells are investigated. The experimental absorption
and photoconductivity spectra agree well with each other. Using the calculated energy spectrum of the
hole and acceptor states in the quantum wells, the contributions of the transitions of holes from the ground
acceptor state to the delocalized ...
Added: March 14, 2022
Yakov Matyushkin, Sergey D., Maxim M. et al., Nano Letters 2020 Vol. 20 No. 10 P. 7296-7303
Plasmonic interferometry is a rapidly growing area of research with a huge potential for applications in the terahertz frequency range. In this Letter, we explore a plasmonic interferometer based on graphene field effect transistor connected to specially designed antennas. As a key result, we observe helicity- and phase-sensitive conversion of circularly polarized radiation into dc ...
Added: March 2, 2021
Адамов Р. Б., Петрук А. Д., Мелентьев Г. А. et al., Научно-технические ведомости Санкт-Петербургского государственного политехнического университета. Физико-математические науки 2022 Т. 15 № 4 С. 32-43
In the paper, comparative studies of near-IR photoluminescence (PL) in structures with GaAs/AlGaAs quantum wells possessing different selective doping profiles have been performed. The PL spectra recorded at 5 K for different intensities of interband optical pumping were analyzed and main channels of radiative recombination were determined. The dependences of the main PL line intensities ...
Added: July 3, 2023
Iomdina E. N., Seliverstov S. V., Teplyakova K. O. et al., Journal of Biomedical Optics 2021 Vol. 26 No. 4 P. 1-10
Significance: Water content plays a vital role in the normally functioning visual system; even a minor disruption in the water balance may be harmful. Today, no direct method exists for corneal hydration assessment, while it could be instrumental in early diagnosis and control of a variety of eye diseases. The use of terahertz (THz) radiation, ...
Added: October 26, 2021
Blank T. G., Grishunin K. A., K. A. Zvezdin et al., Physical Review Letters 2023 Vol. 131 No. 2 Article 026902
The interaction of a single-cycle terahertz electric field with the topological insulator MnBi2Te4 triggers strongly anharmonic lattice dynamics, promoting fully coherent energy transfer between the otherwise noninteracting Raman-active Eg and infrared (IR)-active Eu phononic modes. Two-dimensional terahertz spectroscopy combined with modeling based on the classical equations of motion and symmetry analysis reveals the multistage process underlying the excitation of the ...
Added: January 14, 2024
Адамов Р. Б., Мелентьев Г. А., Подоскин А. А. et al., Физика и техника полупроводников 2023 Т. 57 № 8 С. 663-673
Исследованы фото- и электролюминесценция в p-i-n-структурах с компенсированными квантовыми ямами GaAs/AlGaAs с различными профилями легирования: с пространственным разделением доноров и акцепторов (доноры локализованы в квантовых ямах, акцепторы - в барьерах) и без него (и доноры, и акцепторы локализованы в квантовых ямах). Изучались спектральные характеристики люминесценции в ближнем ИК диапазоне при гелиевых температурах. Выявлены линии излучательной ...
Added: February 5, 2024
Ефимов И. А., Корпачев М. Ю., Костомаров П. С. et al., В кн. : INTERMATIC - 2009. Материалы Международной научно-технической конференции «Фундаментальные проблемы радиоэлектронного приборостроения», 7 - 11 декабря 2009 г., Москва. Ч. 2.: М. : Энергоатомиздат, 2009. С. 244-245.
В настоящей работе рассмотрен метод фокусировки рентгеновского излучения с использованием элементов на основе углеродных нанотрубок. В основу положена задача обеспечения возможности формирования квантовых ям в структуре твердого тела в диапазоне размеров от нескольких десятых долей до единиц нанометров.
Применение устройства для формирования квантовых ям на подложке позволяет обеспечить возможность их формирования в диапазоне размеров от нескольких ...
Added: February 8, 2013
Seliverstov S., Maslennikov S., Ryabchun S. et al., IEEE Transactions on Applied Superconductivity 2015 Vol. 25 No. 3 P. 1-4
We characterize superconducting antenna-coupled hot-electron bolometers for direct detection of terahertz radiation operating at a temperature of 9.0 K. The estimated value of responsivity obtained from lumped-element theory is strongly different from the measured one. A numerical calculation of the detector responsivity is developed, using the Euler method, applied to the system of heat balance ...
Added: March 27, 2015
Kurnosova A. D., Makhov I., Firsov D. A., , in : 21st Russian Youth Conference on Physics of Semiconductors and Nanostructures, Opto- and Nanoelectronics, RYCPS 2019. Vol. 1482.: Bristol : IOP Publishing, 2020. Ch. 012019. P. 1-6.
Added: October 11, 2021
Ozhegov R., Окунев О. В., Goltsman G. et al., Радиотехника и электроника 2009 Т. 54 № 6 С. 750-755
Исследована зависимость флуктуационной чувствительности сверхпроводящего интегрального приемника (СИП) от шумовой температуры приемника и величины входного сигнала. Измерена рекордная флуктуационная чувствительность приемника (13 ± 2 мК), полученная при шумовой температуре приемника 200 К, ширине полосы промежуточных частот 4 ГГц и постоянной времени 1 с. При уменьшении входного сигнала наблюдалось улучшение флуктуационной чувствительности; предложено объяснение полученного эффекта: ...
Added: October 12, 2017
Nadtochiy A., Gordeev N., Kharchenko A. et al., Journal of Lightwave Technology 2021 Vol. 39 No. 23 P. 7479-7485
Modal absorptions in laser-like heterostructures containing
InAs self-assembled quantum dots (QDs) and InGaAs
quantum well-dots (QWDs) have been studied. The evaluation
of photoresponse as a function of waveguide length has allowed
us to determine per-layer modal absorptions of 69 and 13 cm-1
for the ground state optical transitions of QWDs and QDs, respectively.
The values of the modal absorption can be ...
Added: November 28, 2021
Makhov I., Budkin G. V., Graf S. V. et al., Micro and Nanostructures 2022 Vol. 167 Article 207288
The effect of current drag of photons is experimentally investigated in the mid-infrared spectral range corresponded to the intersubband optical electron transitions in GaAs/AlGaAs quantum wells at room temperature for the first time. The optical electron transitions between the first and second electron subbands in quantum wells are revealed in light absorption spectra in the mid-infrared range. The dependences of the ...
Added: July 5, 2022
Budkin G. V., Makhov I. S., Firsov D. A., Journal of Physics: Condensed Matter 2021 Vol. 33 No. 16 Article 165301
The flow of electric current in quantum well breaks the space inversion symmetry, which leads to the dependence of the radiation transmission on the relative orientation of current and photon wave vector, this phenomenon can be named current drag of photons. We have developed a microscopic theory of such an effect for intersubband transitions in ...
Added: October 8, 2021
Nikolaev I., Kazakov A., Drozdov K. et al., Journal of Applied Physics 2022 Vol. 132 No. 23 Article 234301
We report a detailed study of the bipolar persistent photoconductivity in an HgTe/CdHgTe double quantum well (DQW), which can be a perspective for studying topological states in these structures. Photoconductivity spectra measurements in the range of 1.1–3.1 eV as well as transport measurements under different illumination conditions were performed at T = 4.2 K. Based on the results, the processes ...
Added: June 7, 2023
Makhov I. S., Panevin V. Y., Firsov D. A. et al., Journal of Applied Physics 2019 Vol. 126 No. 17 Article 175702
The terahertz radiation in GaAs/AlGaAs quantum wells with different types of doping was experimentally studied under interband optical excitation of nonequilibrium charge carriers. The structures doped only with donors, and the structures with a high degree of compensation of donors by acceptors were studied. The spectra of terahertz radiation associated with charge carrier transitions with ...
Added: October 15, 2021
Ozhegov R., Горшков К. В., Окунев О. В. et al., Письма в Журнал технической физики 2010 Т. 36 № 21 С. 70-77
Исследована возможность использования матрицы чувствительных элементов на гиперполусферической линзе диаметром 12 mm в тепловизоре терагерцевого диапазона частот. Получены размеры области на линзе, приемлемой для расположения матрицы, в которой шумовая температура приемника меняется в пределах 16% от средней. Диаметр этой области составил 3.3% диаметра линзы. Получены отклонения основного лепестка диаграммы направленности, которые составили ±1.25o от направления ...
Added: October 12, 2017
Одиноков С. Б., Кузнецов А. С., Николаев В. В. et al., Естественные и технические науки 2013 № 1 С. 193-195
Presented results of a preliminary experimental research of the parameters of nanoelectromechanical measuring converters with field emission (NEMMC with FE) on optical-electronic stand. ...
Added: November 10, 2018
Ю.Е. Лозовик, Успехи физических наук 2018 Т. 188 № 11 С. 1203-1208
Рассматриваются новые эффекты в системах квантовых диполей: анизотропная сверхтекучесть во внешних полях, эффекты сильных корреляций и кристаллизация, фаза суперсолида. Анализируются эффекты ротонной неустойчивости, типичные для сильно коррелированных бозе-систем, но проявляющиеся в слабо взаимодействующей системе наклонных диполей. Интересными физическими реализациями рассматриваемых систем являются дипольные экситоны в связанных квантовых ямах либо в одиночной квантовой яме в сильном ...
Added: October 22, 2018
Vinnichenko M. Y., Makhov I. S., Panevin V. Y. et al., , in : 21st Russian Youth Conference on Physics of Semiconductors and Nanostructures, Opto- and Nanoelectronics, RYCPS 2019. Vol. 1482.: Bristol : IOP Publishing, 2020.
Added: October 11, 2021
Moiseev E., Максимов М. В., Kryzhanovskaya N. et al., Физика и техника полупроводников 2020 Т. 54 № 2 С. 212-216
The results are presented on a comparative analysis of spectral and threshold characteristics of diode microdisk lasers operating at room temperature in a spectral range of 1.2xx µm with different active regions: InGaAsN/GaAs quantum wells or InAs/InGaAs/GaAs quantum dots. It was found that microlasers of a comparable size with quantum wells have higher lasing threshold ...
Added: September 30, 2020