| Records |
| Author |
Cherednichenko, S.; Drakinskiy, V.; Baubert, J.; Lecomte, B.; Dauplay, F.; Krieg, J. M.; Delorme, Y.; Feret, A.; Hübers, H. W.; Semenov, A. D.; Gol'tsman, G. N. |
| Title |
2.5 THz multipixel heterodyne receiver based on NbN HEB mixers |
Type |
Conference Article |
| Year |
2006 |
Publication |
Proc. SPIE |
Abbreviated Journal |
Proc. SPIE |
| Volume |
6275 |
Issue  |
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Pages |
62750I (1 to 11) |
| Keywords |
HEB, mixer, membrane |
| Abstract |
A 16 pixel heterodyne receiver for 2.5 THz has been developed based on NbN superconducting hot-electron bolometer (HEB) mixers. The receiver uses a quasioptical RF coupling approach where HEB mixers are integrated into double dipole antennas on 1.5 µm thick Si3N4/SiO2 membranes. Spherical mirrors (one per pixel) and backshort distance from the antenna have been used to design the output mixer beam profile. The camera design allows all 16 pixel IF readout in parallel. The gain bandwidth of the HEB mixers on Si3N4/SiO2 membranes was found to be 0.7÷0.9 GHz, which is much smaller than for similar devices on silicon. Application of buffer layers and use of alternative types of membranes (e.g. silicon-on-insulator) is under investigation. |
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no |
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561 |
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| Author |
Финкель, М. И. |
| Title |
Терагерцовые смесители на эффекте электронного разогрева в ультратонких плёнках NbN и NbTiN |
Type |
Manuscript |
| Year |
2006 |
Publication |
М. МПГУ |
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| Keywords |
HEB, detector, mixer, terahertz, THz, infrared, IR, direct detection effect, conversion bandwidth, conversion loss |
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Ph.D. thesis |
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no |
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597 |
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| Author |
Stevens, M.; Hadfield, R.; Schwall, R.; Nam, S.W.; Mirin, R.; Gupta, J. |
| Title |
Fast lifetime measurements of infrared emitters using a low-jitter superconduct- ing single-photon detector |
Type |
Journal Article |
| Year |
2006 |
Publication |
Applied Physics Letters |
Abbreviated Journal |
Appl. Phys. Lett. |
| Volume |
89 |
Issue |
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Pages |
031109 |
| Keywords |
SSPD, jitter, QD, QW |
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no |
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RPLAB @ akorneev @ |
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611 |
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| Author |
Walther, Christoph; Scalari, Giacomo; Faist, Jerome; Beere, Harvey; Ritchie, David |
| Title |
Low frequency terahertz quantum cascade laser operating from 1.6 to 1.8 THz |
Type |
Journal Article |
| Year |
2006 |
Publication |
Applied Physics Letters |
Abbreviated Journal |
Appl. Phys. Lett. |
| Volume |
89 |
Issue |
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Pages |
231121(1-3) |
| Keywords |
QCL, 360 uW at 1.6 THz |
| Abstract |
The authors report a GaAs/Al0.1Ga0.9As quantum cascade laser based on a bound-to-continuum transition optimized for low frequency operation. High tunability of the gain curve is achieved by the Stark effect and laser emission is measured between 1.6 and 1.8 THz. Pulsed mode operation up to 95 K and continuous wave operation up to 80 K are reported. The dynamical range in current is as high as 43%. |
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no |
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629 |
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ГОСТ 2.120-73. ЕСКД. Технический проект |
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2006 |
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gost, detproj |
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no |
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860 |
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ГОСТ 2.501-88. ЕСКД. Правила учета и хранения |
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2006 |
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gost, detproj |
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no |
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862 |
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ГОСТ 3.1102-81. ЕСТД. Стадии разработки и виды документов |
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2006 |
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gost, detproj |
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no |
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868 |
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ГОСТ 3.1121-84. ЕСТД. Общие требования к комплектности и оформлению документов на типовые и групповые технологические процессы (операции) |
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2006 |
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gost, detproj |
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no |
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870 |
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Baryshev A.; Hovenier J.N.; Adam A.J.L.; Kašalynas I.; Gao J.R.; Klaassen T.O.; Williams B.S.; Kumar S.; Hu Q.; Reno J.L. |
| Title |
Phase locking and spectral linewidth of a two-mode terahertz quantum cascade laser |
Type |
Journal Article |
| Year |
2006 |
Publication |
Physics Letters |
Abbreviated Journal |
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89 |
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| Abstract |
We have studied the phase locking and spectral linewidth of an ~ 2.7 THz quantum cascade laser by mixing its two lateral lasing modes. The beat signal at about 8 GHz is compared with a microwave eference by applying conventional phase lock loop circuitry with feedback to the laser bias current. Phase locking has been demonstrated, resulting in a narrow beat linewidth of less than 10 Hz. Under requency stabilization we find that the terahertz line profile is essentially Lorentzian with a minimum linewidth of ~ 6.3 kHz. Power dependent measurements suggest that this linewidth does not approach the Schawlow-Townes limit. |
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RPLAB @ atomics90 @ |
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967 |
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Hovenier J.N.; Adam A.J.L.; Kašalynas I.; Gao J.R.; Klaassen T.O.; Baryshev A.; Williams B.S.; Kumar S.; Hu Q.; Reno J.L. |
| Title |
Phase-locking on the beat signal of a two-mode 2.7 terahertz metal-metal quantum cascade laser |
Type |
Conference Article |
| Year |
2006 |
Publication |
Proc. Symp. IEEE/LEOS Benelux Chapter |
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125-128 |
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| Abstract |
We have studied the linewidth and phase-locking of a 2.7 THz quantum cascade laser by using a superconducting bolometer mixer. The 8 GHz beat signal is compared with a microwave reference with a feedback to the laser bias current. Phase locking has been demonstrated, resulting in an extremely narrow beat linewidth of less than 10 Hz. Under frequency-stabilization conditions we find that the line profile is virtually Lorentzian with a long-term minimum linewidth of the THz modes of about 6.3 kHz. Temperature dependent measurements suggestthat this linewidthdoes not approach the Schawlow-Townes limit. |
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no |
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RPLAB @ atomics90 @ |
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968 |
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