ABOVE BANDGAP THERMO-OPTIC COEFFICIENT MEASUREMENTS FOR DIRECT BANDGAP MATERIALS

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" ABOVE BANDGAP THERMO-OPTIC COEFFICIENT MEASUREMENTS FOR DIRECT BANDGAP MATERIALS "

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	152041
Doc. No	:	ET23833
Main Entry	:	Ramsey Akl
Title Proper	:	ABOVE BANDGAP THERMO-OPTIC COEFFICIENT MEASUREMENTS FOR DIRECT BANDGAP MATERIALS
Note	:	This document is digital این مدرک بصورت الکترونیکی می باشد
Abstract	:	Accurate values of the optical functions of gallium arsenide in the verynear infrared region are particularly important for many technological applications.Many different techniques have been used to measure the thermo-optic coefficients,most of which require ad hoc samples, such as those based on prism-shapedspecimens or on diffraction grating photonic devices. For bulk crystals, the twochannelspectroscopic polarization modulation ellipsometer has been shown to bequite accurate in the determination of the optical functions at elevated temperatures.This work presents a simple approach to determine the thermo-optic coefficients ofgallium arsenide above the bandgap for elevated temperatures. To our knowledge,these measurements have not been pursued, but they do provide important informationfor optical fiber communications. The method is based on the Fresnel equations,which are used to understand the interaction of light with matter. Numerical resultsshow the method to be both stable and accurate.,.............-....,....-...,..tested for theQ1 PC1 bus cardBoth these projects mere sofixare des elopment efforts tonards contributing to dlfferentaspects of Roboucs and lZ1echatronics projects m the Controls and Roboucs Group..
Subject	:	Electericl tess
	:	برق
electronic file name	:	TL47094.pdf
Title and statement of responsibility and	:	ABOVE BANDGAP THERMO-OPTIC COEFFICIENT MEASUREMENTS FOR DIRECT BANDGAP MATERIALS [Thesis]