|
|
Alexandre Karpov, David Miller, Rice FR, Stern JA, Bruce Bumble, LeDuc HG, et al. Low-noise SIS mixer for far-infrared radio astronomy. In: Proc. SPIE. Vol 5498. Glasgow, Scotland, UK; 2004. p. 616–21.
|
|
|
|
Moore DP, Remedios JJ, Waterfall AM, Burgess A. Measuring halocarbons from the MIPAS instrument.; 2004.
|
|
|
|
Yu B, Zeng F, Yang Y, Xing Q, Chechin A, Xin X, et al. Torsional vibrational modes of tryptophan studied by terahertz time-domain spectroscopy. Biophys. J.. 2004;86(3):1649–54.
|
|
|
|
Ciulin V, Carter SG, Sherwin MS. Terahertz optical mixing in biased GaAs single quantum wells. Phys Rev B. 2004;70(11):115312–(1.
|
|
|
|
Koshelets VP. Integrated superconducting submm receivers.; 2004.
|
|
|
|
Statue of the SIR program for SR&T (extension to 1 THz).; 2004.
|
|
|
|
Koshelets VP, Shitov SV, Dmitriev PN Ermakov A. B., Filippenko LV, Koryukin OV, Sobolev AS, et al. Integrated submillimeter and terahertz receivers with superconducting local oscillator [abstract]. In: Presanted at 8th International Workshop “From Andreev Reflection to the International Space Station”.; 2004.
|
|
|
|
Koshelets VP, Dmitriev PN, Ermakov AB, Filippenko LV, Khudchenko AV, Koryukin OV, et al. SIR for TELIS (post-critical) review.; 2004.
|
|
|
|
Korneev A, Kouminov P, Matvienko V, Chulkova G, Smirnov K, Voronov B, et al. Sensitivity and gigahertz counting performance of NbN superconducting single-photon detectors. Appl Phys Lett. 2004;84(26):5338–40.
Abstract: We have measured the quantum efficiencysQEd, GHz counting rate, jitter, and noise-equivalentpowersNEPdof nanostructured NbN superconducting single-photon detectorssSSPDsdin thevisible to infrared radiation range. Our 3.5-nm-thick and 100- to 200-nm-wide meander-typedevices(total area 10310mm2), operating at 4.2 K, exhibit an experimental QE of up to 20% inthe visible range and,10% at 1.3 to 1.55mm wavelength and are potentially sensitive up tomidinfrareds,10mmdradiation. The SSPD counting rate was measured to be above 2 GHz withjitter,18 ps, independent of the wavelength. The devices’ NEP varies from,10−17W/Hz1/2for1.55mm photons to,10−20W/Hz1/2for visible radiation. Lowering the SSPD operatingtemperature to 2.3 K significantly enhanced its performance, by increasing the QE to,20% andlowering the NEP level to,3310−22W/Hz1/2, both measured at 1.26mm wavelength.
|
|
|
|
Siddiqi I, Prober DE. Nb–Au bilayer hot-electron bolometers for low-noise THz heterodyne detection. Appl Phys Lett. 2004;84(8):1404.
Abstract: The sensitivity of present Nb diffusion-cooled hot-electron bolometer (HEB) mixers is not quantum limited, and can be improved by reducing the superconducting transition temperature TC. Lowering TC reduces thermal fluctuations, resulting in a decrease of the mixer noise temperature TM. However, lower TC mixers have reduced dynamic range and saturate more easily due to background noise. We present 30 GHz microwave measurements on a bilayer HEB system, Nb–Au, in which TC can be tuned with Au layer thickness to obtain the maximum sensitivity for a given noise background. These measurements are intended as a guide for the optimization of THz mixers. Using a Nb–Au mixer with TC = 1.6 K, we obtain TM = 50 K with 2 nW of local oscillator (LO) power. Good mixer performance is observed over a wide range of LO power and bias voltage and such a device should not exhibit saturation in a THz receiver.
|
|
