Picosecond infrared switching and spectroscopy of highly excited electronic states in the narrow-gap semiconductors InSb, PbTe, and (HgCd)Te
Thesis/Dissertation
·
OSTI ID:6830708
Picosecond optical techniques are aplied to study the spectral and dynamic properties of high-density, electron-hole plasmas in several narrow-gap semiconductors. The physics of the transient free-carrier plasma edge and its application to the study of high density plasmas and the switching of high-power, picosecond mid-infrared pulses are discussed. The design and construction of mode-locked Nd:glass and Nd:YAG lasers, a hybrid TEA CO/sub 2/ laser, and other experimental apparatus is given in detail. The arrangement and performance of a semiconductor switch generating picosecond 10.6 micron pulses of variable duration is presented. The ultrashort pulses are used to study the nonlinear transmission in InSb at 10.6 microns. An excite-probe technique is applied to measure the recombination times of high-density, electron-hole plasmas in InSb, (HgCd)Te, and PbTe. The luminescence from highly excited PbTe is characterized spectrally and temporally. Experimental results of optical gain at 5.3 microns in PbTe are given. The physics of recombination for high-density plasmas in narrow-gap semiconductors are discussed considering the applicability of models for Auger recombination. The possibility of using highly-excited narrow-gap semiconductors as picosecond, mid-infrared optical sources is considered.
- Research Organization:
- Brown Univ., Providence, RI (USA)
- OSTI ID:
- 6830708
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360603* -- Materials-- Properties
42 ENGINEERING
420300 -- Engineering-- Lasers-- (-1989)
ALLOYS
AMPLIFICATION
ANTIMONY ALLOYS
CADMIUM COMPOUNDS
CADMIUM TELLURIDES
CARBON DIOXIDE LASERS
CHALCOGENIDES
DATA
ELECTRICAL EQUIPMENT
ELECTRON-HOLE COUPLING
ELECTRONIC STRUCTURE
EQUIPMENT
EXPERIMENTAL DATA
GAIN
GAS LASERS
INDIUM ALLOYS
INFORMATION
INFRARED SPECTRA
LASER SPECTROSCOPY
LASERS
LEAD COMPOUNDS
LEAD TELLURIDES
LUMINESCENCE
MERCURY COMPOUNDS
MERCURY TELLURIDES
NEODYMIUM LASERS
NUMERICAL DATA
PERFORMANCE
PLASMA
PNICTIDES
Q-SWITCHING
RECOMBINATION
SEMICONDUCTOR DEVICES
SEMICONDUCTOR SWITCHES
SOLID STATE LASERS
SPECTRA
SPECTROSCOPY
SWITCHES
TELLURIDES
TELLURIUM COMPOUNDS
USES
360603* -- Materials-- Properties
42 ENGINEERING
420300 -- Engineering-- Lasers-- (-1989)
ALLOYS
AMPLIFICATION
ANTIMONY ALLOYS
CADMIUM COMPOUNDS
CADMIUM TELLURIDES
CARBON DIOXIDE LASERS
CHALCOGENIDES
DATA
ELECTRICAL EQUIPMENT
ELECTRON-HOLE COUPLING
ELECTRONIC STRUCTURE
EQUIPMENT
EXPERIMENTAL DATA
GAIN
GAS LASERS
INDIUM ALLOYS
INFORMATION
INFRARED SPECTRA
LASER SPECTROSCOPY
LASERS
LEAD COMPOUNDS
LEAD TELLURIDES
LUMINESCENCE
MERCURY COMPOUNDS
MERCURY TELLURIDES
NEODYMIUM LASERS
NUMERICAL DATA
PERFORMANCE
PLASMA
PNICTIDES
Q-SWITCHING
RECOMBINATION
SEMICONDUCTOR DEVICES
SEMICONDUCTOR SWITCHES
SOLID STATE LASERS
SPECTRA
SPECTROSCOPY
SWITCHES
TELLURIDES
TELLURIUM COMPOUNDS
USES