Abstract
To construct an electronically controllable phase array system in the millimeter-wave region, one needs switches, phase shifters, and modulators which are operable at speeds of ~ 1 nsec and with a time precision of several picoseconds. The only technique possessing this speed capability uses an optically injected electron-hole plasma in a semiconductor waveguide to control the phase shift and attenuation of the millimeter waves. In our early experiments, ultrafast millimeter-wave switching without jitter has been demonstrated with a response time of 40 psec.1 The modulation of millimeter-wave signals at 94 GHz with a repetition rate of ≥200 MHz has also been reported. To design optically controllable millimeter-wave components, it is necessary to understand in detail the behavior of the electron-hole plasma in a semiconductor. For this purpose, we will report on the newly developed techniques which can follow the dynamic evolution of the electron-hole plasma in the semiconductor with excellent time resolution.
© 1984 Optical Society of America
PDF ArticleMore Like This
Aileen M. Vaucher, Ming G. Li, C. D. Striffler, and Chi H. Lee
WC7 International Conference on Ultrafast Phenomena (UP) 1984
Chi H. Lee, M. G. Li, and Aileen M. Vaucher
WL5 Conference on Lasers and Electro-Optics (CLEO:S&I) 1983
Chi. H. Lee, Aileen M. Yurek, M. G. Li, E. Chauchard, and R. Fischers
WE4 Picosecond Electronics and Optoelectronics (UEO) 1985