Optimization of the configuration of a symmetric three-barrier resonant-tunneling structure as an active element of a quantum cascade detector

Tkach, N. V.; Seti, Ju. O.

doi:10.1134/s1063782611030195

Cited by 13 publications

(19 citation statements)

References 11 publications

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“…Такий підхід, за-пропонований у роботах [5,7,14], до оптимі-зації геометричного дизайну активних зон і каскадів багатокаскадних наноприладів, що працюють у одномодовому режимі, може бути узагальнений на випадок оптимізації геоме-тричного дизайну робочого елемента ККЛ за умови реалізації двофотонної генерації.…”

Section: аналіз отриманих результатівunclassified

Role of Two-Photon Electronic Transitions in Operation of Quantum Cascade Lasers

Tkach¹,

Сеті²,

Boiko³

et al. 2014

SEMST

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Анотація. У наближенні ефективних мас та прямокутних потенціальних ям і бар'єрів для електрона на основі аналітично знайдених розв'язків повного рівняння Шредінгера розвинена теорія динамічної провідності трибар'єрної резонансно-тунельної наноструктури у слабкому електромагнітному полі з урахуванням двофотонних електронних переходів з різними частотами. Показано, що вклад двофотонних електронних переходів з випромінюванням електромагнітних хвиль у загальну величину динамічної провідності в оптимальних конфігураціях трибар'єрної наноструктури може досягати 40%.Ключові слова: резонансно-тунельна структура, квантовий лазер, квантовий детектор, динамiчна провiднiсть. ROLE OF TWO-PHOTON ELECTRONIC TRANSITIONS IN OPERATION OF QUANTUM CASCADE LASERS M. V. Tkach, Ju. O. Seti, I. V. Boyko, M. V. Pan'kivAbstract. The theory of dynamic conductivity of three-barrier resonant tunneling structure in weak electromagnetic field taking into account two-photon electronic transitions with different frequencies is developed within the approximation of effective mass and rectangular potential wells and barriers for the electron using the analytically obtained solutions of complete Schrodinger equation. It is shown that

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Section: аналіз отриманих результатівunclassified

Role of Two-Photon Electronic Transitions in Operation of Quantum Cascade Lasers

Tkach¹,

Сеті²,

Boiko³

et al. 2014

SEMST

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“…Theoretical study of electronic band structure of the GaAs/AlAs superlattice with uniformly distributed tunnel-connected QDs was done in [5,6]. The relations of wave vector dependence of the electron energy were obtained.…”

Section: Introductionmentioning

confidence: 99%

Coefficient of Interband Light Absorption by InAs/GaхIn1-хAs Quantum Dot Superlattice at Low Temperatures

Boichuk

Bilynsky

Pazyuk

2017

PCSS

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In the paper the InAs/Ga x In 1-x As superlattice system of small size cubic QDs (10 nm) has been considered. Dispersion relations for electron and hole subbands have been calculated for superlattices of different dimensionality. The dependences of the interband absorption coefficient on light frequency, quantum dot size and interdot distance have been researched.It is shown, that the dimension of the superlattice has influence on the shape of the absorption bands and the increasing of the distance between quantum dots is followed by narrowing of the absorption peaks for all three superlattice types.

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“…It was established that when the widths of nano-structure outer barriers were bigger than 3-4 nm, the resonance energies in open and closed models were almost the same and the resonance widths were two-three orders smaller than the energies. Considering the widths of outer barriers of a three-barrier RTS (the active bands of experimental QCD) as rather big (3-6 nm) [6], we develop the theory of electron-I-phonon interaction using the model of closed three-barrier RTS (figure 1) with fixed effective masses m (z) = {m w (II, IV); m b (I, III, V)} and rectangular potential energy profile neglecting the small decay rate Expressing the electron wave function in the form…”

Section: Hamiltonian and Fourier Image Of Green's Function Of The Sysmentioning

confidence: 99%

“…The effect of phonons on the transport properties of electronic current through RTS was mainly investigated for the two-and three-barrier nano-structures [5][6][7]. Studying the probabilities of quantum transitions using the Fermi golden rule, it is enough to use the Hamiltonian of electron-phonon interaction in the representation of the second quantization over the phonon variables only, obtained by Mori and Ando [8] for a double heterostructure.…”

Section: Introductionmentioning

confidence: 99%

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The effect of interface phonons on operating electron states in three-barrier resonant tunneling structure as an active region of quantum cascade detector

Tkach¹,

Seti²,

Grynyshyn³

et al. 2014

Condens. Matter Phys.

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The Hamiltonian of electrons interacting with interface phonons in three-barrier resonant tunneling structure is established using the first principles within the models of effective mass and polarization continuum. Using the Green's functions method, the temperature shifts and decay rates of operating electron states are calculated depending on geometric design of three-barrier nano-structure GaAs/Al x Ga 1−x As which is an active region of quantum cascade detector. It is established that independently of the temperature, the energy of quantum transition during the process of electromagnetic field absorption is a nonlinear weakly varying function of the position of the inner barrier with respect to the outer barriers of the structure.

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Optimization of the configuration of a symmetric three-barrier resonant-tunneling structure as an active element of a quantum cascade detector

Cited by 13 publications

References 11 publications

Role of Two-Photon Electronic Transitions in Operation of Quantum Cascade Lasers

Role of Two-Photon Electronic Transitions in Operation of Quantum Cascade Lasers

Coefficient of Interband Light Absorption by InAs/GaхIn1-хAs Quantum Dot Superlattice at Low Temperatures

The effect of interface phonons on operating electron states in three-barrier resonant tunneling structure as an active region of quantum cascade detector

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