|
|
Hübers H-W, Semenov AD, Richter H, Schubert J, Hadjiloucas S, Bowen JW, et al. Antenna pattern of the quasi-optical hot-electron bolometric mixer at terahertz frequencies. In: Proc. 12th Int. Symp. Space Terahertz Technol. San Diego, CA, USA; 2001. p. 286–96.
|
|
|
|
Merkel HF, Khosropanah P, Sigfrid Yngvesson K, Cherednichenko S, Kroug M, Adam A, et al. An active zone small signal model for hot-electron bolometric mixers. In: Proc. 12th Int. Symp. Space Terahertz Technol. San Diego, CA, USA; 2001. 55.
|
|
|
|
Skalare A, McGrath WR, Echternach PM, Leduc HG, Siddiqi I, Verevkin A, et al. Aluminum hot-electron bolometer mixers at submillimeter wavelengths. IEEE Trans. Appl. Supercond.. 2001;11(1):641–4.
Abstract: Diffusion-cooled aluminum hot-electron bolometer (HEB) mixers are of interest for low-noise high resolution THz-frequency spectroscopy within astrophysics. Al HEB mixers offer operation with an order of magnitude less local oscillator power, higher intermediate frequency bandwidth and potentially lower noise than competing devices made from other materials. We report on mixer experiments at 618 GHz with devices fabricated from films with sheet resistances in the range from about 55 Ω down to about 9 Ω per square. Intermediate frequency bandwidths of up to 3 GHz were measured (1 μm long device), with absorbed local oscillator power levels of 0.5 to 6 nW and mixer conversion up to -21.5 dB. High input coupling efficiency implies that the electrons in the device are able to thermalize before escaping from the device. It was found that the long coherence length complicates mixer operations due to the proximity of the contact pads. Also, saturation at the IF frequency may be a concern for this type of device, and warrants further studies.
|
|
|
|
Siemsen KJ, Bernard JE, Madej AA, Marmet L. Absolute frequency measurement of a CO2/OsO4 stabilized laser at 28.8 THz. Appl Phys B: Lasers and Optics. 2001;72:567–73.
|
|
|
|
Boreman GD. A Users guide to IR detectors. In: Proc. SPIE. Vol 4420.; 2001. p. 79–90.
Abstract: This paper will guide the first-time user toward proper selection and use of IR detectors for applications in industrial inspection, process control, and laser measurements.
|
|
|
|
Shelkovnikov A, Grain C, Nguyen CT, Butcher RJ, Amy-Klein A, Chardonnet C. 500-Hz two-photon Ramsey fringes with a SF6 beam: towards a new frequency standard in the 30-THz spectral region. Appl Phys B: Lasers and Optics. 2001;73:93–8.
|
|
