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Nn, Zinov'ev; Fletcher, R.; Lj, Challis

doi:10.1103/physrevb.49.14466

Cited by 6 publications

(7 citation statements)

References 20 publications

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“…3 to determine the spectral linewidth. Zinovev 13 modeled the interference fringes for the case of vertical emission only and found qualitative agreement with the measured fringe pattern. However, the emission angle is not purely vertical; in reality it is spread out over 2 steradians almost evenly ͑see above͒.…”

Section: Linewidthsupporting

confidence: 57%

“…The periodic structures are interference fringes due to the Fabry-Perot etalon formed by the substrate. This effect was modeled and measured by Zinovev [13], and provides evidence that the source is indeed quasi-monochromatic. Three important figures of merit for our source are the optical beam pattern, emitted power, and linewidth.…”

Section: A Principle Of Operationmentioning

confidence: 88%

“…In our technique, we heat the electrons with a dc current; the emission frequency is then tunable by magnetic field. This cyclotron emission from 2DEGs has been studied by many groups [4][5][6][7][8][9][10][11][12][13][18][19][20]. Here, we are mainly interested in characterizing the emission power and spectrum in order to use it as a THz source.…”

Section: A Principle Of Operationmentioning

confidence: 99%

“…Previous studies of C.R. emission [4][5][6][7][8][9][10][11][12][13] typically used microsecond or millisecond pulses with low duty cycle for fear of overheating the sample and inadvertently broadening the emission linewidth. The experimental results presented here indicate that low chopping frequencies do not significantly degrade the emission linewidth.…”

mentioning

confidence: 99%

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An all-cryogenic THz transmission spectrometer

Burke

Eisenstein

Pfeiffer³

et al. 2002

Review of Scientific Instruments

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This article describes a THz transmission spectrometer for the spectral range of 2-65 cm Ϫ1 ͑100 GHz to 2 THz͒ with a spectral resolution of at least 1.8 cm Ϫ1 ͑50 GHz͒ where the source, sample, and detector are all fully contained in a cryogenic environment. Cyclotron emission from a two-dimensional electron gas ͑2DEG͒ heated with an electrical current serves as a magnetic-field tunable source. The spectrometer is demonstrated at 4.2 K by measuring the resonant cyclotron absorption of a second 2DEG. Unique aspects of the spectrometer are that ͑1͒ an ultrabroadband detector is used, and ͑2͒ the emitter is run quasicontinuously with a chopping frequency of only 1 Hz. Since optical coupling to room temperature components is not necessary, this technique is compatible with ultralow temperature ͑sub-100 mK͒ operation.

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Section: Linewidthsupporting

confidence: 57%

Section: A Principle Of Operationmentioning

confidence: 88%

Section: A Principle Of Operationmentioning

confidence: 99%

mentioning

confidence: 99%

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An all-cryogenic THz transmission spectrometer

Burke

Eisenstein

Pfeiffer³

et al. 2002

Review of Scientific Instruments

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show abstract

“…The far infrared comprises less than 10 24 (GaAs heterostructures) or 10 26 [Si MOSFETs (metal-oxidesemiconductor field-effect transistors)] of the total emission [5][6][7] and has been observed only at source-drain currents I SD , which exceed the breakdown currents for the QHE. The study of the acoustic phonon emission is an alternative and more desirable approach because it directly reflects the majority of the dissipation.…”

mentioning

confidence: 99%

Spectroscopy of Phonon Emission in the Quantum Hall Effect Regime

1998

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Phonon emission from two-dimensional electron gases in the quantum Hall effect (QHE) state of a Si MOSFET was measured using the phonon-induced conductivity of the substrate. The inherent phonon energy detection threshold of this system was used to analyze the frequency spectra of the phonons in strong magnetic fields. It was found that phonons with cyclotron energy are emitted in the QHE state. The emission takes place in the corners of the Hall bar sample where the current enters and exits. This observation probably indicates that, in the QHE state, the temperature of the electrons in the corners rises sufficiently to allow inter-Landau-level transitions. [S0031-9007(98)05967-5]

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A spontaneous multiphoton emission induced by inhomogeneous potential in electrically modulated two-dimensional electron gases

1998

Microelectronic Engineering

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Far-infrared emission from magnetically quantized two-dimensional electron gases in GaAs/AlxGa1

Cited by 6 publications

References 20 publications

An all-cryogenic THz transmission spectrometer

An all-cryogenic THz transmission spectrometer

Spectroscopy of Phonon Emission in the Quantum Hall Effect Regime

A spontaneous multiphoton emission induced by inhomogeneous potential in electrically modulated two-dimensional electron gases

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