Anyone hoping to exploit this promising region of the electromagnetic spectrum must confront its very daunting physics
By CARTER M. ARMSTRONG / SEPTEMBER 2012
- The average power of microfabricated vacuum devices rose two orders of magnitude, from about 10 µW to over a milliwatt at 650 GHz, and researchers are now working on multibeam and sheet-beam devices capable of higher power than comparable low-voltage single round-beam units.
- The average power of submillimeter monolithic microwave integrated circuits and transistors climbed by a factor of five to eight, to the 100 mW level at 200 GHz and 1 mW at 650 GHz.
- The operating frequency range for milliwatt-class cryogenically cooled quantum cascade lasers was extended down to 1.8 THz in 2012, compared to 2.89 THz in 2007.
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