| Records |
| Author |
Vaks, V. L.; Kurin, V. V.; Pankratov, A. L.; Koshelets, V. P. |
| Title |
Investigation of spectral properties of phase-focked flux flow oscillator |
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Abstract |
| Year |
2005 |
Publication |
ISEC |
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Pages |
PD-04 |
| Keywords |
SIR, FFO |
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Place of Publication |
Netherlands |
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522 |
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| Author |
Hoogeveen, R. W. M.; Yagoubov, P. A.; de Lange, A.; Selig, A. M.; Koshelets, V. P.; Ellison B. N.; Birk, M. |
| Title |
Superconducting integrated receiver development for TELIS |
Type |
Conference Article |
| Year |
2005 |
Publication |
Proc. 12th International Symposium on Remote Sensing |
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SIR |
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Bruges, Belgium |
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no |
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523 |
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| Author |
Lee, Ju-Hyun; Kim, Dong-Woo; Wu, Yung-Hsun; Yu, Chang-Jae; Lee, Sin-Doo; Wu, Shin-Tson |
| Title |
High-speed infrared phase modulators using short helical pitch ferroelectric liquid crystals |
Type |
Journal Article |
| Year |
2005 |
Publication |
Optics Express |
Abbreviated Journal |
Opt. Express |
| Volume |
13 |
Issue |
20 |
Pages |
7732 |
| Keywords |
IR modulator |
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| ISSN |
1094-4087 |
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no |
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541 |
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| Author |
Тарасов, М.; Кузьмин, Л. |
| Title |
Концепция смесителя на основе болометра на холодных электронах |
Type |
Journal Article |
| Year |
2005 |
Publication |
Письма в ЖЭТФ |
Abbreviated Journal |
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| Volume |
81 |
Issue |
10 |
Pages |
661-664 |
| Keywords |
CEB, mixer |
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no |
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545 |
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| Author |
Baselmans, J. J. A.; Hajenius, M.; Gao, J. R.; Baryshev, A.; Kooi, J.; Klapwijk, T. M.; Voronov, B.; de Korte, P.; Gol'tsman, G. |
| Title |
NbN hot electron bolometer mixers: sensitivity, LO power, direct detection and stability |
Type |
Journal Article |
| Year |
2005 |
Publication |
IEEE Trans. Appl. Supercond. |
Abbreviated Journal |
IEEE Trans. Appl. Supercond. |
| Volume |
15 |
Issue |
2 |
Pages |
484-489 |
| Keywords |
HEB mixers, direct detection effect, stability, Allan variance |
| Abstract |
We demonstrate that the performance of NbN lattice cooled hot electron bolometer mixers depends strongly on the interface quality between the bolometer and the contact structure. Both the receiver noise temperature and the gain bandwidth can be improved by a factor of 2 by cleaning the interface and adding an additional superconducting interlayer to the contact pad. Using this we obtain a double sideband receiver noise temperature of 950 K at 2.5 THz and 4.3 K, using a 0.4/spl times/4 /spl mu/m HEB mixer with a spiral antenna. At the same bias point, we obtain an IF gain bandwidth of 6 GHz. To comply with current demands on THz mixers for use in space based receivers we reduce the device size to 0.15/spl times/1 /spl mu/m and use a twin slot antenna. We report measurements of the noise temperature, LO power requirement, stability and the direct detection effect, using a mixer with a 1.6 THz twin slot antenna and a 1.462 THz solid state LO source with calibrated output power. |
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1051-8223 |
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no |
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Serial |
546 |
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| Author |
Goltsman, Gregory N.; Vachtomin, Yuriy B.; Antipov, Sergey V.; Finkel, Matvey I.; Maslennikov, Sergey N.; Polyakov, Stanislav L.; Svechnikov, Sergey I.; Kaurova, Natalia S.; Grishina, Elisaveta V.; Voronov, Boris M. |
| Title |
Low-noise NbN phonon-cooled hot-electron bolometer mixers for terahertz heterodyne receivers |
Type |
Conference Article |
| Year |
2005 |
Publication |
Proc. 9-th WMSCI |
Abbreviated Journal |
Proc. 9-th WMSCI |
| Volume |
9 |
Issue |
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Pages |
154-159 |
| Keywords |
NbN HEB mixers |
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| Publisher |
International Institute of Informatics and Systemics |
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no |
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Serial |
547 |
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| Author |
Nagatsuma, T.; Hirata, A.; Sato, Y.; Yamaguchi, R.; Takahashi, H.; Kosugi, T.; Tokumitsu, M.; Sugahara, H.; Furuta, T.; Ito, H. |
| Title |
Sub-Terahertz Wireless Communications Technologies |
Type |
Conference Article |
| Year |
2005 |
Publication |
Proc. 18th International Conference on Applied Electromagnetics and Communications (ICECom 2005) |
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Issue |
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Pages |
1-4 |
| Keywords |
subterahartz terahertz THz communications |
| Abstract |
This paper presents a 10-Gb/s wireless link system that uses a 120-GHz-band sub-terahertz electro-magnetic waves. In the transmitter, photonic techniques are used for generation, modulation, and emission of the sub-THz signals, while the receiver is composed of all-electronic devices using InP-HEMTs. |
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no |
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Serial |
593 |
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| Author |
An, Zhenghua; Chen, Jeng-Chung; Ueda, T.; Komiyama, S.; Hirakawa, K. |
| Title |
Infrared phototransistor using capacitively coupled two-dimensional electron gas layers |
Type |
Journal Article |
| Year |
2005 |
Publication |
Applied Physics Letters |
Abbreviated Journal |
Appl. Phys. Lett. |
| Volume |
86 |
Issue |
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Pages |
172106 - 172106-3 |
| Keywords |
2DEG |
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no |
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RPLAB @ akorneev @ |
Serial |
603 |
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| Author |
Barends, R.; Hajenius, M.; Gao, J. R.; Klapwijk, T. M. |
| Title |
Current-induced vortex unbinding in bolometer mixers |
Type |
Journal Article |
| Year |
2005 |
Publication |
Applied Physics Letters |
Abbreviated Journal |
Appl. Phys. Lett. |
| Volume |
87 |
Issue |
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Pages |
263506 (1 to 3) |
| Keywords |
HEB mixer numerical model, HEB model, IV-curves, vortex-antivortex, Berezinskii–Kosterlitz–Thouless theory, diffusion cooling channel, diffusion channel, distributed HEB model, distributed model, self-heating effect, temperature profile |
| Abstract |
We present a description of the current-voltage characteristics of hot electron bolometers in terms of the current-dependent intrinsic resistive transition of NbN films. We find that, by including this current dependence, we can correctly predict the complete current-voltage characteristics, showing excellent agreement with measurements for both low and high bias and for small as well as large devices. It is assumed that the current dependence is due to vortex-antivortex unbinding as described in the Berezinskii–Kosterlitz–Thouless theory. The presented approach will be useful in guiding device optimization for noise and bandwidth. |
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no |
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604 |
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| Author |
Huebers, Heinz-Wilhelm; Pavlov, S.; Semenov, A.; Köhler, R.; Mahler, L.; Tredicucci, A.; Beere, H.; Ritchie, D.; Linfield, E. |
| Title |
Terahertz quantum cascade laser as local oscillator in a heterodyne receiver |
Type |
Journal Article |
| Year |
2005 |
Publication |
Optics Express |
Abbreviated Journal |
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| Volume |
13 |
Issue |
15 |
Pages |
5890-5896 |
| Keywords |
QCL heterodyne, 6 mW at 2.5 THz, HEB mixer, terahertz |
| Abstract |
Terahertz quantum cascade lasers have been investigated with respect to their performance as a local oscillator in a heterodyne receiver. The beam profile has been measured and transformed in to a close to Gaussian profile resulting in a good matching between the field patterns of the quantum cascade laser and the antenna of a superconducting hot electron bolometric mixer. Noise temperature measurements with the hot electron bolometer and a 2.5 THz quantum cascade laser yielded the same result as with a gas laser as local oscillator. |
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no |
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627 |
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