Records |
Author |
Mann, C. M.; Matheson, D. N.; Ellison, B. N.; Oldfield, M. L.; Moyna, B. P.; Spencer, J. J.; Wilsher, D. S.; Maddison, B. J. |
Title |
On the design and measurement of a 2.5 THz waveguide mixer |
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Conference Article |
Year |
1998 |
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Proc. 9th Int. Symp. Space Terahertz Technol. |
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161 |
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RPLAB @ s @ schottky_Tn_16800_at_2p5THz |
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283 |
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Author |
Tetsu Suzuki; Chris Mann; Takanari Yasui; Hirotomo Fujishima; Koji Mizuno |
Title |
Quasi–integrated planar Schottky barrier diodes for 2.5 THz receivers |
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Conference Article |
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1998 |
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Proc. 9th Int. Symp. Space Terahertz Technol. |
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187 |
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RPLAB @ s @ schottky_Tn_24000_at_2p5THz |
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284 |
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Author |
Chouvaev, D.; Kuzmin, L.; Tarasov, M.; Sundquist, P.; Willander, M.; Claeson, T. |
Title |
Normal metal hot-electron microbolometer with Andreev mirrors for THz space applications |
Type |
Conference Article |
Year |
1998 |
Publication |
Proc. 9th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 9th Int. Symp. Space Terahertz Technol. |
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331-335 |
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RPLAB @ s @ det_metal_Andreev_Chouvaev_Shitov |
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285 |
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Maddison, B. J.; Martin, R. J.; Oldfield, M. L.; Mann, C. M.; Matheson, D. N.; Ellison, B. N.; Thornton, J.; Hall, W. J.; Lamarre, D. M. |
Title |
A compact 500 GHz planar schottky siode receiver with a wide instantaneous bandwidth |
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Conference Article |
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1998 |
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Proc. 9th Int. Symp. Space Terahertz Technol. |
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367 |
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RPLAB @ s @ schottky_Tn_4800_at_p5THz |
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286 |
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Author |
Brown, Robert. L. |
Title |
Technical specification of the Millimeter Array |
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Conference Article |
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1998 |
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Proc. SPIE, Advanced Technology MMW, Radio, and Terahertz Telescopes, vol. 3357 |
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231-237 |
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Phillips, Thomas G. |
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Address is unknown |
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RPLAB @ s @ ALMA_tech |
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287 |
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Author |
Dahl, H.; Metz, H. J.; Wriedt, T. |
Title |
Light scattering of silver halide crystals |
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Conference Article |
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1998 |
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Proc. 3rd Workshop on Electromagnetic and Light Scattering |
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51-58 |
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Universität Bremen |
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504 |
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Author |
Bingham, S. J.; Börger, B.; Suter, D.; Thomson, A. J. |
Title |
The design and sensitivity of microwave frequency optical heterodyne receivers |
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Journal Article |
Year |
1998 |
Publication |
Review of Scientific Instruments |
Abbreviated Journal |
Rev. Sci. Instrum. |
Volume |
69 |
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9 |
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3403-3409 |
Keywords |
optical mixing |
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0034-6748 |
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508 |
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Author |
Dieleman, Piter |
Title |
Fundamental limitations of THz niobium and niobiumnitride SIS mixers |
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Book Whole |
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1998 |
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SIS |
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Ph.D. thesis |
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Rijksuniversiteit, Groningen |
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529 |
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Author |
Floet, D. Wilms; Baselmans, J. J. A.; Klapwijk, T. M.; Gao, J. R. |
Title |
Resistive transition of niobium superconducting hot-electron bolometer mixers |
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Journal Article |
Year |
1998 |
Publication |
Applied Physics Letters |
Abbreviated Journal |
Appl. Phys. Lett. |
Volume |
73 |
Issue |
19 |
Pages |
2826 |
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HEB |
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0003-6951 |
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543 |
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Author |
Kawamura, Jonathan; Blundell, Raymond; Tong, C.-Y. Edward; Papa, D. Cosmo; Hunter, Todd R.; Gol'tsman, Gregory; Cherednichenko, Sergei; Voronov, Boris; Gershenzon, Eugene |
Title |
First light with an 800 GHz phonon-cooled HEB mixer receiver |
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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35-43 |
Keywords |
HEB, mixer, LO power, local oscillator power, saturation effect, dynamic range |
Abstract |
Phonon-cooled superconductive hot-electron bolometric (HEB) mixers are incorporated in a waveguide receiver designed to operate near 800 Gliz. The mixer elements are thin-film nio- bium nitride microbridges with dimensions of 4 nm thickness, 0.2 to 0.3 p.m in length and 2 jun in width. At 780 GHz the best receiver noise temperature is 840 K (DSB). The mixer IF bandwidth is 2.0 GHz, the absorbed LO power is —0.1 1.1W. A fixed-tuned version of the re- ceiver was installed at the Submillimeter Telescope Observatory on Mt. Graham, Arizona, to conduct astronomical observations. These observations represent the first time that a receiver incorporating any superconducting HEB mixer has been used to detect a spectral line of celes- tial origin. |
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Pasadena, California, USA |
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572 |
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Burke, P. J.; Schoelkopf, R. J.; Prober, D. E.; Skalare, A.; Karasik, B. S.; Gaidis, M. C.; McGrath, W. R.; Bumble, B.; Leduc, H. G. |
Title |
Spectrum of thermal fluctuation noise in diffusion and phonon cooled hot-electron mixers |
Type |
Journal Article |
Year |
1998 |
Publication |
Applied Physics Letters |
Abbreviated Journal |
Appl. Phys. Lett. |
Volume |
72 |
Issue |
12 |
Pages |
1516-1518 |
Keywords |
HEB mixer; thermal fluctuation noise; TFN |
Abstract |
A systematic study of the intermediate frequency noise bandwidth of Nb thin-film superconducting hot-electron bolometers is presented. We have measured the spectrum of the output noise as well as the conversion efficiency over a very broad intermediate frequency range (from 0.1 to 7.5 GHz) for devices varying in length from 0.08 μm to 3 μm. Local oscillator and rf signals from 8 to 40 GHz were used. For a device of a given length, the spectrum of the output noise and the conversion efficiency behave similarly for intermediate frequencies less than the gain bandwidth, in accordance with a simple thermal model for both the mixing and thermal fluctuation noise. For higher intermediate frequencies the conversion efficiency decreases; in contrast, the noise decreases but has a second contribution which dominates at higher frequency. The noise bandwidth is larger than the gain bandwidth, and the mixer noise is low, between 120 and 530 K (double side band). |
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RPLAB @ gujma @ |
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760 |
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Yagoubov, P.; Kroug, M.; Merkel, H.; Kollberg, E.; Gol'tsman, G.; Svechnikov, S.; Gershenzon, E. |
Title |
Noise temperature and local oscillator power requirement of NbN phonon-cooled hot electron bolometric mixers at terahertz frequencies |
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Journal Article |
Year |
1998 |
Publication |
Appl. Phys. Lett. |
Abbreviated Journal |
Appl. Phys. Lett. |
Volume |
73 |
Issue |
19 |
Pages |
2814-2816 |
Keywords |
NbN HEB mixers, noise temperature, local oscillator power |
Abstract |
In this letter, the noise performance of NbN-based phonon-cooled hot electron bolometric quasioptical mixers is investigated in the 0.55–1.1 THz frequency range. The best results of the double-sideband <cd><2018>DSB<cd><2019> noise temperature are: 500 K at 640 GHz, 600 K at 750 GHz, 850 K at 910 GHz, and 1250 K at 1.1 THz. The water vapor in the signal path causes significant contribution to the measured receiver noise temperature around 1.1 THz. The devices are made from 3-nm-thick NbN film on high-resistivity Si and integrated with a planar spiral antenna on the same substrate. The in-plane dimensions of the bolometer strip are typically 0.2Ï«2 um. The amount of local oscillator power absorbed in the bolometer is less than 100 nW. |
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911 |
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Author |
Il’in, K. S.; Milostnaya, I. I.; Verevkin, A. A.; Gol’tsman, G. N.; Gershenzon, E. M.; Sobolewski, R. |
Title |
Ultimate quantum efficiency of a superconducting hot-electron photodetector |
Type |
Journal Article |
Year |
1998 |
Publication |
Appl. Phys. Lett. |
Abbreviated Journal |
Appl. Phys. Lett. |
Volume |
73 |
Issue |
26 |
Pages |
3938-3940 |
Keywords |
NbN SSPD, SNSPD |
Abstract |
The quantum efficiency and current and voltage responsivities of fast hot-electron photodetectors, fabricated from superconducting NbN thin films and biased in the resistive state, have been shown to reach values of 340, 220 A/W, and 4×104 V/W,
respectively, for infrared radiation with a wavelength of 0.79 μm. The characteristics of the photodetectors are presented within the general model, based on relaxation processes in the nonequilibrium electron heating of a superconducting thin film. The observed, very high efficiency and sensitivity of the superconductor absorbing the photon are explained by the high multiplication rate of quasiparticles during the avalanche breaking of Cooper pairs. |
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0003-6951 |
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1579 |
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Author |
Merkel, H. F.; Yagoubov, P. A.; Kroug, M.; Khosropanah, P.; Kollberg, E. L.; Gol’tsman, G. N.; Gershenzon, E. M. |
Title |
Noise temperature and absorbed LO power measurement methods for NbN phonon-cooled hot electron bolometric mixers at terahertz frequencies |
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Conference Article |
Year |
1998 |
Publication |
Proc. 28th European Microwave Conf. |
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Proc. 28th European Microwave Conf. |
Volume |
1 |
Issue |
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Pages |
294-299 |
Keywords |
NbN HEB mixers |
Abstract |
In this paper the absorbed LO power requirements and the noise performance of NbN based phonon-cooled hot electron bolometric (HEB) quasioptical mixers are investigated for RF frequencies in the 0.55-1.1 range The minimal measured DSB noise temperatures are about 500 K at 640 GHz, 600 K at 750 GHz, 850 K at 910 GHz and 1250 K at 1.1 THz. The increase in noise temperature at 1.1THz is attributed to water absorption. The absorbed LO power is measured using a calorimetric approach. The results are subsequently corrected for lattice heating. These values are compared to results of a novel one dimensional hot spot mixer models and to a more traditional isotherm method which tends to underestimate the absorbed LO power for small bias powers. Typically a LO power between 50nW and 100nW is needed to pump the device to the optimal operating point. |
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28th European Microwave Conference |
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1580 |
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Blundell, R.; Kawamura, J. H.; Tong, C. E.; Papa, D. C.; Hunter, T. R.; Gol’tsman, G. N.; Cherednichenko, S. I.; Voronov, B. M.; Gershenzon, E. M. |
Title |
A hot-electron bolometer mixer receiver for the 680-830 GHz frequency range |
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Conference Article |
Year |
1998 |
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Proc. 6-th Int. Conf. Terahertz Electron. |
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Proc. 6-th Int. Conf. Terahertz Electron. |
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18-20 |
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NbN HEB mixers |
Abstract |
We describe a heterodyne receiver designed to operate in the partially transparent atmospheric windows centered on 680 and 830 GHz. The receiver incorporates a niobium nitride thin film, cooled to 4.2 K, as the phonon-cooled hot-electron mixer element. The double sideband receiver noise, measured over the frequency range 680-830 GHz, is typically 700-1300 K. The instantaneous output bandwidth of the receiver is 600 MHz. This receiver has recently been used at the SubMillimeter Telescope, jointly operated by the Steward Observatory and the Max Planck Institute for Radioastronomy, for observations of the neutral carbon and CO spectral lines at 810 GHz and at 806 and 691 GHz respectively. Laboratory measurements on a second mixer in the same test receiver have yielded extended high frequency performance to 1 THz. |
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Leeds, UK |
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IEEE |
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0-7803-4903-2 |
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IEEE Sixth International Conference on Terahertz Electronics Proceedings. THZ 98. (Cat. No.98EX171) |
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1581 |
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