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Author Tong, C.-Y. E.; Meledin, D.; Loudkov, D.; Blundell, R.; Erickson, N.; Kawamura, J.; Mehdi, I.; Gol’tsman, G. url  doi
openurl 
  Title A 1.5 THz Hot-Electron Bolometer mixer operated by a planar diode based local oscillator Type Conference Article
  Year 2003 Publication IEEE MTT-S Int. Microwave Symp. Digest Abbreviated Journal IEEE MTT-S Int. Microwave Symp. Digest  
  Volume 2 Issue Pages 751-754  
  Keywords (down) waveguide NbN HEB mixers  
  Abstract We have developed a 1.5 THz superconducting NbN Hot-Electron Bolometer mixer. It is operated by an all-solid-state Local Oscillator comprising of a cascade of 4 planar doublers following an MMIC based W-band power amplifier. The threshold available pump power is estimated to be 1 /spl mu/W.  
  Address Philadelphia, PA, USA  
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  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 1516  
Permanent link to this record
 
 
Author Tong, C.-Y. Edward; Meledin, Denis; Blundell, Raymond; Erickson, Neal; Kawamura, Jonathan; Mehdi, Imran; Gol'tsman, Gregory url  openurl
  Title A 1.5 THz hot-electron bolometer mixer operated by a planar diode-based local oscillator Type Abstract
  Year 2003 Publication Proc. 14th Int. Symp. Space Terahertz Technol. Abbreviated Journal Proc. 14th Int. Symp. Space Terahertz Technol.  
  Volume Issue Pages 286  
  Keywords (down) waveguide NbN HEB mixers  
  Abstract We describe a 1.5 THz heterodyne receiver based on a superconductin g hot-electron bolometer mixer, which is pumped by an all-solid-state local oscillator chain. The bolometer is fabricated from a 3.5 nm-thick niobium nitride film deposited on a quartz substrate with a 200 nm-thick magnesium oxide buffer layer. The bolometer measures 0.15 fun in width and 1.5 1..tm in length. The chip consisting of the bolometer and mixer circuitry is incorporated in a fixed-tuned waveguide mixer block with a corru g ated feed horn. The local oscillator unit comprises of a cascade of four planar doublers followin g a MMIC-based W-band power amplifier. The local oscillator is coupled to the mixer using a Martin-Puplett interferometer. The local oscillator output power needed for optimal receiver performance is approximately 1 to 2 11W, and the chain is able to provide this power at a number of frequency points between 1.45 and 1.56 THz. By terminating the rf input with room temperature and 77 K loads, a Y-factor of 1.11 (DSB) has been measured at a local oscillator frequency of 1.476 THz at 3 GHz intermediate frequency.  
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  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 1501  
Permanent link to this record
 
 
Author Meledin, D.; Tong, C.-Y. E.; Blundell, R.; Goltsman, G. url  doi
openurl 
  Title Measurement of intermediate frequency bandwidth of hot electron bolometer mixers at terahertz frequency range Type Journal Article
  Year 2003 Publication IEEE Microw. Wireless Compon. Lett. Abbreviated Journal IEEE Microw. Wireless Compon. Lett.  
  Volume 13 Issue 11 Pages 493-495  
  Keywords (down) waveguide NbN HEB mixers  
  Abstract We have developed a new experimental setup for measuring the IF bandwidth of superconducting hot electron bolometer mixers. In our measurement system we use a chopped hot filament as a broadband signal source, and can perform a high-speed IF scan with no loss of accuracy when compared to coherent methods. Using this technique we have measured the 3 dB IF bandwidth of hot electron bolometer mixers, designed for THz frequency operation, and made from 3-4 nm thick NbN film deposited on an MgO buffer layer over crystalline quartz.  
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  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1531-1309 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 1509  
Permanent link to this record
 
 
Author Anthore, A.; Pothier, H.; Esteve, D. doi  openurl
  Title Density of states in a superconductor carrying a supercurrent Type Journal Article
  Year 2003 Publication Phys. Rev. Lett. Abbreviated Journal Phys. Rev. Lett.  
  Volume 90 Issue 12 Pages 127001 (1 to 4)  
  Keywords (down) Usadel, superconducting nanowire  
  Abstract We have measured the tunneling density of states (DOS) in a superconductor carrying a supercurrent or exposed to an external magnetic field. The pair correlations are weakened by the supercurrent, leading to a modification of the DOS and to a reduction of the gap. As predicted by the theory of superconductivity in diffusive metals, we find that this effect is similar to that of an external magnetic field.  
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  Notes Recommended by Klapwijk Approved no  
  Call Number Serial 924  
Permanent link to this record
 
 
Author Hoogeveen, R. W. M.; Yagoubov, P. A.; Maurellis, A.; Koshelets, V. P.; Shitov, S. V.; Mair, U.; Krocka, M.; Wagner, G.; Birk, M.; Huebers, H.-W.; Richter, H.; Semenov, A.; Gol’tsman, G. N.; Voronov, B. M.; Ellison, B.N.; Kerridge, B.J.; Matheson, D. N.; Alderman, B.; Harman, M.; Siddans, R.; Reburn, J. url  doi
openurl 
  Title New cryogenic heterodyne techniques applied in TELIS: the balloonborne THz and submillimeter limb sounder for atmospheric research Type Conference Article
  Year 2003 Publication Proc. SPIE Abbreviated Journal Proc. SPIE  
  Volume 5152 Issue Pages 347-355  
  Keywords (down) TELIS, limb sounder, heterodyne detection, terahertz, sub millimeter, cryogenic, limb sounding, balloon borne, atmospheric research  
  Abstract We present a design concept for a new state-of-the-art balloon borne atmospheric monitor that will allow enhanced limb sounding of the Earth’s atmosphere within the submillimeter and far-infrared wavelength spectral range: TELIS, TErahertz and submm LImb Sounder. The instrument is being developed by a consortium of major European institutes that includes the Space Research Organization of the Netherlands (SRON), the Rutherford Appleton Laboratory (RAL) will utilize state-of-the-art superconducting heterodyne technology and is designed to be a compact, lightweight instrument cpaable of providing broad spectral coverage, high spectral resolution and long flight duration ( 24 hours duration during a single flight campaign). The combination of high sensitivity and extensive flight duration will allow evaluation of the diurnal variation of key atmospheric constitutenets sucyh as OH, HO2, ClO, BrO togehter will onger lived constituents such as O3, HCL and N2O. Furthermore, TELIS will share a common balloon platform to that of the MIPAS-B Fourier Transform Spectrometer, developed by the Institute of Meteorology and Climate research of the over an extended spectral range. The combination of the TELIS and MIPAS instruments will provide atmospheric scientists with a very powerful observational tool. TELIS will serve as a testbed for new cryogenic heterodyne detection techniques, and as such it will act as a prelude to future spaceborne instruments planned by the European Space Agency (ESA).  
  Address  
  Corporate Author Thesis  
  Publisher SPIE Place of Publication Editor Strojnik, M.  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference Infrared Spaceborne Remote Sensing XI  
  Notes Approved no  
  Call Number Serial 1508  
Permanent link to this record
 
 
Author Hirata, A.; Harada, M.; Nagatsuma, T. openurl 
  Title 120-GHz wireless link using photonic techniques for generation, modulation, and emission of millimeter-wave signals Type Journal Article
  Year 2003 Publication J. of Lightwave Technology Abbreviated Journal  
  Volume 21 Issue 10 Pages 2145-2153  
  Keywords (down) subterahartz terahertz THz communications  
  Abstract We present a wireless link system that uses millimeter-wave (MMW) photonic techniques. The photonic transmitter in the wireless link consists of an optical 120-GHz MMW generator, an optical modulator, and a high-power photonic MMW emitter. A uni-traveling carrier photodiode (UTC-PD) was used as the photonic emitter in order to eliminate electronic MMW amplifiers. We evaluated the dependence of UTC-PD output power on its transit-time limited bandwidth and its CR-time constant limited bandwidth, and employed a UTC-PD with the highest output power for the photonic emitter. As for the MMW generation, we developed a 120-GHz optical MMW generator that generates a pulse train and one that generates a sinusoidal signal. The UTC-PD output power generated by a narrow pulse train was higher than that generated by sinusoidal signals under the same average optical power condition, which contributes to reducing the photocurrent of the photonic emitter. We have experimentally demonstrated that the photonic transmitter can transmit data at up to 3.0 Gb/s. The wireless link using the photonic transmitter can be applied to optical gigabit Ethernet signals.  
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  Notes Approved no  
  Call Number Serial 592  
Permanent link to this record
 
 
Author Zhang, Jin; Slysz, W.; Verevkin, A.; Okunev, O.; Chulkova, G.; Korneev, A.; Lipatov, A.; Gol'tsman, G. N.; Sobolewski, R. doi  openurl
  Title Response time characterization of NbN superconducting single-photon detectors Type Journal Article
  Year 2003 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal  
  Volume 13 Issue 2 Pages 180-183  
  Keywords (down) SSPD jitter, SNSPD jitter  
  Abstract We report our time-resolved measurements of NbN-based superconducting single-photon detectors. The structures are meander-type, 10-nm thick, and 200-nm wide stripes and were operated at 4.2 K. We have shown that the NbN devices can count single-photon pulses with below 100-ps time resolution. The response signal pulse width was about 150 ps, and the system jitter was measured to be 35 ps.  
  Address  
  Corporate Author Thesis  
  Publisher IEEE Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
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  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 1058  
Permanent link to this record
 
 
Author Zwiller, V.; Aichele, T.; Seifert, W.; Persson, J.; Benson, O. url  doi
openurl 
  Title Generating visible single photons on demand with single InP quantum dots Type Journal Article
  Year 2003 Publication Applied Physics Letters Abbreviated Journal Appl. Phys. Lett.  
  Volume 82 Issue 10 Pages 1509-1511  
  Keywords (down) single photon, quantum dot, InP  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0003-6951 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 503  
Permanent link to this record
 
 
Author Su, M. Y.; Carter, S. G.; Sherwin, M. S. url  doi
openurl 
  Title Strong-field terahertz optical mixing in excitons Type Journal Article
  Year 2003 Publication Phys. Rev. B Abbreviated Journal Phys. Rev. B  
  Volume 67 Issue 12 Pages  
  Keywords (down) optical mixing  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1098-0121 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 500  
Permanent link to this record
 
 
Author Finkel, Matvey; Vachtomin, Yuriy; Antipov, Sereey; Drakinski, Vladimir; Kaurova, Natalia; Voronov, Boris; Goltsman, Greeory url  openurl
  Title Gain bandwidth and noise temperature of NbTiN HEB mixer Type Conference Article
  Year 2003 Publication Proc. 14th Int. Symp. Space Terahertz Technol. Abbreviated Journal Proc. 14th Int. Symp. Space Terahertz Technol.  
  Volume Issue Pages 276-285  
  Keywords (down) NbTiN HEB mixer  
  Abstract We have determined that the gain bandwidth of phonon-cooled HEB mixer employing NbTiN films deposited on MgO layer over Si substrate is limited b y the escape of phonons to the substrate. The cut-off frequencies of 1 um long devices operating at T 71, based on 3.5 nm. 4 nm and 10 nm thick films amount to 400 Mk. 300 MHz, and 100 MHz, respectivel y . The gain bandwidth of 0.13 . um long devices fabricated from 3.5 nm thick film is larger and amounts to 0.8 GIL; at the optimal operating point and to 1.5 GIL: at larger bias. The increase of the gain bandwidth from 400 MHz up to 1.5 GH: with the change of bridge length is attributed to diffusion cooling. A double sideband noise temperature of 4000 K was obtained for heterodyne receiver utilizing pilot NbTiN HEB mixer (not optimized for normal state resistance) operating at the local oscillator frequency of 2.5 THz.  
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  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 1500  
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