NDLI: Development of a 1.9 THz Band Hot-Electron Bolometer Heterodyne Receiver with a Quantum Cascade Laser

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Development of a 1.9 THz Band Hot-Electron Bolometer Heterodyne Receiver with a Quantum Cascade Laser

Content Provider	Semantic Scholar
Author	Maezawa, Hiroyuki Yamakura, Tetsuya Koyama, Tetsuji Yamamoto, Satoshi Shiba, Shoichi Shiino, T. Sakai, Nami Nakai, Naoya Seta, Masumichi Mizuno, Akira Nagahama, Tomoo Fukui, Yasuo Irimajiri, Yoshihisa Sekine, Nobuyuki Hosako, Iwao
Copyright Year	2010
Abstract	We are developing a superconducting Hot-Electron Bolometer (HEB) mixer receiver for the 1.9 THz frequency band. The microbridge of the HEB mixer was made at room temperature from a 6 nm thick Niobium Titanium Nitride (NbTiN) film deposited on a 20 nm-thick AlN interface layer using a helicon sputtering technique. The mixer was cooled to 4.2 K by using a vibration-free closed-cycle mechanical 4 K pulse tube refrigerator. The stability of the HEB mixer receiver was studied in the 1.5 THz band by varying the local oscillator power of a multiplier chain solid-state source with the bias voltage of the mixer fixed. The output power of the intermediate frequency (IF) signal had a maximum peak as a function of the bias current of the HEB mixer. The receiver noise temperature was minimum at around the maximum peak. It was also found that the IF signal was most stable at around the maximum peak. For future use we have performed test fabrication of stacked GaAs/Al0.1Ga0.9As active layers for the preparation of bound to continuum based quantum cascade lasers to be used as a 1.9 THz band local oscillator source. The result of X-ray diffraction measurements showed that the 120 repeated quantum well structures can be deposited with a molecular beam epitaxy (MBE) system within 0.78 % structural mismatch error.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://www.nrao.edu/meetings/isstt/papers/2010/2010444449.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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