Abstract
Two-photon conductivity in GaAs and CdS0·5Se0·5 were investigated with modelocked Nd:glass laser pulse excitation, with a view to determine their suitability for picosecond pulsewidth measurement. The contrast ratio using GaAs as twophoton conductor was 1.8 and it increased to 2.4 when CdS0·5Se0·5 was used. The improved contrast ratio in the case of CdS0·5Se0·5 was partly due to the improved resolution of the crystal (2 ps) and partly due to the extended square-law region.
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Work supported in part by ARPA monitored by Army Research Office and by NSF through the Center of Material Research.
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Lee, C.H., Jayaraman, S. Measurement of ultrashort optical pulses by two-photon photoconductivity techniques. Opto-electronics 6, 115–120 (1974). https://doi.org/10.1007/BF01421993
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DOI: https://doi.org/10.1007/BF01421993