New Techniques and Applications for High Resolution Tunable Submillimeter Spectroscopy
Recent advances in submillimeter detectors  and sources  have opened up new possibilities for high resolution spectroscopy in the 300 to 3000 GHz regime (10 to 100 cm−1). The techniques described here are based on the development of GaAs Schottky diode detectors mounted in a corner-cubeconfiguration, and upon new optically pumped cw submillimeter lasers. The diodes, in conjunction with the lasers have been used to make high sensitivity heterodyne radiometers and receivers suitable for high resolution spectroscopy. In addition, the same Schottky diode system has been utilized for efficient sideband modulation of laser signals. This use of the diode permits tunable radiation to be generated ± 1 cm−1 about any submillimeter laser line.
KeywordsFilter Bank Schottky Diode Heterodyne Detector High Resolution Spectroscopy Ellipsoidal Mirror
Unable to display preview. Download preview PDF.
- 4.W. A. M. Blumberg, D. D. Peck, H. R. Fetterman, Appl. Phys. Lett. to be published.Google Scholar
- 7.G. A. Koepf et al., to be published.Google Scholar
- 8.See for example Frank C. DeLucia in Molecular Spectroscopy: Modern Research edited by K. N. Rao, ( Academic Press, New York 1976 ) p. 69.Google Scholar