| Records |
| Author |
Kroug, M.; Yagoubov, P.; Gol'tsman, G.; Kollberg, E. |
| Title |
NbN quasioptical phonon cooled hot electron bolometric mixers at THz frequencies |
Type |
Conference Article |
| Year |
1997 |
Publication |
Inst. Phys. Conf. Ser. |
Abbreviated Journal |
Inst. Phys. Conf. Ser. |
| Volume |
1 |
Issue |
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Pages |
405-408 |
| Keywords |
NbN HEB mixers |
| Abstract |
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| Address |
Veldhoven |
| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
Bristol |
Editor |
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| Language |
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Original Title |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0951-3248 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
3rd Eur. Conf. on Applied Superconductivity |
| Notes |
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Approved |
no |
| Call Number |
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Serial |
1600 |
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| Author |
Cherednichenko, S.; Yagoubov, P.; Il'In, K.; Gol'tsman, G.; Gershenzon, E. |
| Title |
Large bandwidth of NbN phonon-cooled hot-electron bolometer mixers on sapphire substrates |
Type |
Conference Article |
| Year |
1997 |
Publication |
Proc. 8th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 8th Int. Symp. Space Terahertz Technol. |
| Volume |
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Issue |
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Pages |
245-257 |
| Keywords |
NbN HEB mixers, fabrication process |
| Abstract |
The bandwidth of NbN phonon-cooled hot electron bolometer mixers has been systematically investigated with respect to the film thickness and film quality variation. The films, 2.5 to 10 mm thick, were fabricated on sapphire substrates using DC reactive magnetron sputtering. All devices consisted of several parallel strips, each 1 1.1 wide and 211 long, placed between Ti-Au contact pads. To measure the gain bandwidth we used two identical BWOs operating in the 120-140 GHz frequency range, one functioning as a local oscillator and the other as a signal source. The majority of the measurements were made at an ambient temperature of 4.5 K with optimal LO and DC bias. The maximum 3 dB bandwidth (about 4 GHz) was achieved for the devices made of films which were 2.5-3.5 nm thick, had a high critical temperature, and high critical current density. A theoretical analysis of bandwidth for these mixers based on the two-temperature model gives a good description of the experimental results if one assumes that the electron temperature is equal to the critical temperature. |
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Approved |
no |
| Call Number |
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Serial |
276 |
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| Author |
Kawamura, J.; Blundell, R.; Tong, C-Y. E.; Gol'tsman, G.; Gershenzon, E.; Voronov, B.; Cherednichenko, S. |
| Title |
Phonon-cooled NbN HEB mixers for submillimeter wavelengths |
Type |
Conference Article |
| Year |
1997 |
Publication |
Proc. 8th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 8th Int. Symp. Space Terahertz Technol. |
| Volume |
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Issue |
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Pages |
23-28 |
| Keywords |
waveguide NbN HEB mixers |
| Abstract |
The noise performance of receivers incorporating NbN phonon-cooled superconducting hot electron bolometric mixers is measured from 200 GHz to 900 GHz. The mixer elements are thin-film (thickness — 4 nm) NbN with —5 to 40 pm area fabricated on crystalline quartz sub- strates. The receiver noise temperature from 200 GHz to 900 GHz demonstrates no unexpected degradation with increasing frequency, being roughly TRx ,; 1-2 K The best receiver noise temperatures are 410 K (DSB) at 430 GHz, 483 K at 636 GHz, and 1150 K at 800 GHz. |
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Edition |
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Medium |
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Expedition |
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Conference |
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| Notes |
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Approved |
no |
| Call Number |
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Serial |
275 |
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| Author |
Gerecht, E.; Musante, C. F.; Jian, H.; Yngvesson, K. S.; Dickinson, J.; Waldman, J.; Gol'tsman, G. N.; Yagoubov, P. A.; Voronov, B. M.; Gershenzon, E. M. |
| Title |
Measured results for NbN phonon-cooled hot electron bolometric mixers at 0.6-0.75 THz, 1.56 THz, and 2.5 THz |
Type |
Conference Article |
| Year |
1998 |
Publication |
Proc. 9th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 9th Int. Symp. Space Terahertz Technol. |
| Volume |
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Issue |
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Pages |
105-114 |
| Keywords |
NbN HEB mixers |
| Abstract |
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| Address |
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Thesis |
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Place of Publication |
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Editor |
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Edition |
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ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
no |
| Call Number |
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Serial |
1587 |
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| Author |
Yagoubov, P.; Kroug, M.; Merkel, H.; Kollberg, E.; Schubert, J.; Hubers, H. W.; Svechnikov, S.; Voronov, B.; Gol'tsman, G.; Wang, Z. |
| Title |
Hot electron bolometric mixers based on NbN films deposited on MgO substrates |
Type |
Conference Article |
| Year |
1999 |
Publication |
Inst. Phys. Conf. Ser. |
Abbreviated Journal |
Inst. Phys. Conf. Ser. |
| Volume |
167 |
Issue |
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Pages |
687-690 |
| Keywords |
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| Abstract |
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Thesis |
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Place of Publication |
Barcelona, Spain |
Editor |
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Conference |
4th Europ. Conf. on Appl. Superconductivity, Inst. Phys. Conf. Ser. |
| Notes |
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Approved |
no |
| Call Number |
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Serial |
297 |
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| Author |
Tong, C.-Y. Edward; Kawamura, Jonathan; Todd, R. Hunter; Papa, D. Cosmo; Blundell, Raymond.; Smith, Michael; Patt, Ferdinand; Gol'tsman, Gregory; Gershenzon, Eugene |
| Title |
Successful operation of a 1 THz NbN hot-electron bolometer receiver |
Type |
Conference Article |
| Year |
2000 |
Publication |
Proc. 11th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 11th Int. Symp. Space Terahertz Technol. |
| Volume |
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Issue |
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Pages |
49-59 |
| Keywords |
NbN HEB mixers, applications |
| Abstract |
A phonon-cooled NbN superconductive hot-electron bolometer receiver covering the frequency range 0.8-1.04 THz has successfully been used for astronomical observation at the Sub-Millimeter Telescope Observatory on Mount Graham, Arizona. This waveguide heterodyne receiver is a modified version of our fixed-tuned 800 GHz HEB receiver to allow for operation beyond 1 THz. The measured noise temperature of this receiver is about 1250 K at 0.81 THz, 560 K at 0.84 THz, and 1600 K at 1.035 THz. It has a 1 GHz wide IF bandwidth, centered at 1.8 GHz. This receiver has recently been used to detect the CO (9-8) molecular line emission at 1.037 THz in the Orion nebula. This is the first time a ground-based heterodyne receiver has been used to detect a celestial source above 1 THz. |
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| Notes |
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Approved |
no |
| Call Number |
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Serial |
303 |
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| Author |
Semenov, A. D.; Hübers, H.–W.; Schubert, J.; Gol'tsman, G. N.; Elantiev, A. I.; Voronov, B. M.; Gershenzon, E. M. |
| Title |
Frequency dependent noise temperature of the lattice cooled hot-electron terahertz mixer |
Type |
Conference Article |
| Year |
2000 |
Publication |
Proc. 11th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 11th Int. Symp. Space Terahertz Technol. |
| Volume |
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Issue |
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Pages |
39-48 |
| Keywords |
NbN HEB mixers |
| Abstract |
We present the measurements and the theoretical model on the frequency dependent noise temperature of a lattice cooled hot electron bolometer (HEB) mixer in the terahertz frequency range. The experimentally observed increase of the noise temperature with frequency is a cumulative effect of the non-uniform distribution of the high frequency current in the bolometer and the charge imbalance, which occurs near the edges of the normal domain and contacts with normal metal. In addition, we present experimental results which show that the noise temperature of a HEB mixer can be reduced by about 30% due to a Parylene antireflection coating on the Silicon hyperhemispheric lens. |
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| Notes |
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Approved |
no |
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Serial |
305 |
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| Author |
Gershenson, M. E.; Gong, D.; Sato, T.; Karasik, B. S.; Sergeev, A. V. |
| Title |
Millisecond electron-phonon relaxation in ultrathin disordered metal films at millikelvin temperatures |
Type |
Journal Article |
| Year |
2001 |
Publication |
Appl. Phys. Lett. |
Abbreviated Journal |
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| Volume |
79 |
Issue |
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Pages |
2049-2051 |
| Keywords |
HEB detector, FIR, far infrared |
| Abstract |
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no |
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RPLAB @ s @ heb_eph_interaction_Gershenzon |
Serial |
315 |
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| Author |
Cherednichenko, S.; Kroug, M.; Merkel, H.; Kollberg, E.; Loudkov, D.; Smirnov, K.; Voronov, B.; Gol'tsman, G.; Gershenzon, E. |
| Title |
Local oscillator power requirement and saturation effects in NbN HEB mixers |
Type |
Conference Article |
| Year |
2001 |
Publication |
Proc. 12th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 12th Int. Symp. Space Terahertz Technol. |
| Volume |
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Issue |
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Pages |
273-285 |
| Keywords |
NbN HEB mixers, LO power, local oscillator power, saturation effect, dynamic range |
| Abstract |
The local oscillator power required for NbN hot-electron bolometric mixers (P LO ) was investigated with respect to mixer size, critical temperature and ambient temperature. P LO can be decreased by a factor of 10 as the mixer size decreases from 4×0.4 µm 2 to 0.6×0.13 µm 2 . For the smallest volume mixer the optimal local oscillator power was found to be 15 nW. We found that for such mixer no signal compression was observed up to an input signal of 2 nW which corresponds to an equivalent input load of 20,000 K. For a constant mixer volume, reduction of T c can decrease optimal local oscillator power at least by a factor of 2 without a deterioration of the receiver noise temperature. Bath temperature was found to have minor effect on the receiver characteristics. |
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San Diego, CA, USA |
Editor |
Jet Propulsion Laboratory, California Inst.it.u.t.e of Technology |
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no |
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Serial |
318 |
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| Author |
Kroug, M.; Cherednichenko, S.; Choumas, M.; Merkel, H.; Kollberg, E.; Hübers, H.-W.; Richter, H.; Loudkov, D.; Voronov, B.; Gol'Tsman, G. |
| Title |
HEB quasi-optical heterodyne receiver for THz frequencies |
Type |
Conference Article |
| Year |
2001 |
Publication |
Proc. 12th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
244-252 |
| Keywords |
HEB mixer, NbN, MgO, conversion gain bandwidth, noise temperature |
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Place of Publication |
San Diego, CA, USA |
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no |
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Serial |
319 |
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