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Giant Terahertz Photoconductance of Quantum Point Contacts in the Tunneling Regime. / Otteneder, M.; Kvon, Z. D.; Tkachenko, O. A. et al.

In: Physical Review Applied, Vol. 10, No. 1, 014015, 17.07.2018.

Research output: Contribution to journal › Article › peer-review

Harvard

Otteneder, M, Kvon, ZD, Tkachenko, OA, Tkachenko, VA, Jaroshevich, AS, Rodyakina, EE, Latyshev, AV & Ganichev, SD 2018, 'Giant Terahertz Photoconductance of Quantum Point Contacts in the Tunneling Regime', Physical Review Applied, vol. 10, no. 1, 014015. https://doi.org/10.1103/PhysRevApplied.10.014015

APA

Otteneder, M., Kvon, Z. D., Tkachenko, O. A., Tkachenko, V. A., Jaroshevich, A. S., Rodyakina, E. E., Latyshev, A. V., & Ganichev, S. D. (2018). Giant Terahertz Photoconductance of Quantum Point Contacts in the Tunneling Regime. Physical Review Applied, 10(1), [014015]. https://doi.org/10.1103/PhysRevApplied.10.014015

Vancouver

Otteneder M, Kvon ZD, Tkachenko OA, Tkachenko VA, Jaroshevich AS, Rodyakina EE et al. Giant Terahertz Photoconductance of Quantum Point Contacts in the Tunneling Regime. Physical Review Applied. 2018 Jul 17;10(1):014015. doi: 10.1103/PhysRevApplied.10.014015

Author

Otteneder, M. ; Kvon, Z. D. ; Tkachenko, O. A. et al. / Giant Terahertz Photoconductance of Quantum Point Contacts in the Tunneling Regime. In: Physical Review Applied. 2018 ; Vol. 10, No. 1.

BibTeX

@article{cdf06517ab1448218aa888ff372b454d,
title = "Giant Terahertz Photoconductance of Quantum Point Contacts in the Tunneling Regime",
abstract = "We report on the observation of the giant photoconductance of a quantum point contact (QPC) in the tunneling regime excited by terahertz radiation. Studied QPCs are formed in a GaAs/(Al,Ga)As heterostructure with a high-electron-mobility two-dimensional electron gas. We demonstrate that irradiation of strongly negatively biased QPCs by laser radiation with frequency f=0.69THz and intensity 50mW/cm2 results in two orders of magnitude enhancement of the QPC conductance. The effect increases with the dark conductivity decrease. It is also characterized by a strong polarization dependence and a drastic reduction of the signal by increasing the radiation frequency to 1.63 THz. We demonstrate that all experimental findings can be well explained by the photon-assisted tunneling through the QPC. Corresponding calculations are in good agreement with the experiment.",
keywords = "2-DIMENSIONAL ELECTRON-GAS, FAR-INFRARED RADIATION, MICROWAVE-RADIATION, DEEP IMPURITIES, FIELDS, WELLS, IONIZATION, ABSORPTION, TRANSPORT, TIME",
author = "M. Otteneder and Kvon, {Z. D.} and Tkachenko, {O. A.} and Tkachenko, {V. A.} and Jaroshevich, {A. S.} and Rodyakina, {E. E.} and Latyshev, {A. V.} and Ganichev, {S. D.}",
note = "Publisher Copyright: {\textcopyright} 2018 American Physical Society.",
year = "2018",
month = jul,
day = "17",
doi = "10.1103/PhysRevApplied.10.014015",
language = "English",
volume = "10",
journal = "Physical Review Applied",
issn = "2331-7019",
publisher = "American Physical Society",
number = "1",

}

RIS

TY - JOUR

T1 - Giant Terahertz Photoconductance of Quantum Point Contacts in the Tunneling Regime

AU - Otteneder, M.

AU - Kvon, Z. D.

AU - Tkachenko, O. A.

AU - Tkachenko, V. A.

AU - Jaroshevich, A. S.

AU - Rodyakina, E. E.

AU - Latyshev, A. V.

AU - Ganichev, S. D.

N1 - Publisher Copyright: © 2018 American Physical Society.

PY - 2018/7/17

Y1 - 2018/7/17

N2 - We report on the observation of the giant photoconductance of a quantum point contact (QPC) in the tunneling regime excited by terahertz radiation. Studied QPCs are formed in a GaAs/(Al,Ga)As heterostructure with a high-electron-mobility two-dimensional electron gas. We demonstrate that irradiation of strongly negatively biased QPCs by laser radiation with frequency f=0.69THz and intensity 50mW/cm2 results in two orders of magnitude enhancement of the QPC conductance. The effect increases with the dark conductivity decrease. It is also characterized by a strong polarization dependence and a drastic reduction of the signal by increasing the radiation frequency to 1.63 THz. We demonstrate that all experimental findings can be well explained by the photon-assisted tunneling through the QPC. Corresponding calculations are in good agreement with the experiment.

AB - We report on the observation of the giant photoconductance of a quantum point contact (QPC) in the tunneling regime excited by terahertz radiation. Studied QPCs are formed in a GaAs/(Al,Ga)As heterostructure with a high-electron-mobility two-dimensional electron gas. We demonstrate that irradiation of strongly negatively biased QPCs by laser radiation with frequency f=0.69THz and intensity 50mW/cm2 results in two orders of magnitude enhancement of the QPC conductance. The effect increases with the dark conductivity decrease. It is also characterized by a strong polarization dependence and a drastic reduction of the signal by increasing the radiation frequency to 1.63 THz. We demonstrate that all experimental findings can be well explained by the photon-assisted tunneling through the QPC. Corresponding calculations are in good agreement with the experiment.

KW - 2-DIMENSIONAL ELECTRON-GAS

KW - FAR-INFRARED RADIATION

KW - MICROWAVE-RADIATION

KW - DEEP IMPURITIES

KW - FIELDS

KW - WELLS

KW - IONIZATION

KW - ABSORPTION

KW - TRANSPORT

KW - TIME

UR - http://www.scopus.com/inward/record.url?scp=85050378298&partnerID=8YFLogxK

U2 - 10.1103/PhysRevApplied.10.014015

DO - 10.1103/PhysRevApplied.10.014015

M3 - Article

AN - SCOPUS:85050378298

VL - 10

JO - Physical Review Applied

JF - Physical Review Applied

SN - 2331-7019

IS - 1

M1 - 014015

ER -

ID: 15964617