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Dielectric cap quantum well disordering for band gap tuning of InGaAs/InGaAsP quantum well structure using various combinations of semiconductor-dielectric capping layers  

조재원 (광운대학교 전자물리학과)
이희택 (광운대학교 전자물리학과)
최원준 (한국과학기술연구원 광기술연구센터)
우덕하 (한국과학기술연구원 광기술연구센터)
김선호 (한국과학기술연구원 광기술연구센터)
강광남 (한국과학기술연구원 광기술연구센터)
Publication Information
Journal of the Korean Vacuum Society / v.11, no.4, 2002 , pp. 207-211 More about this Journal
Abstract
Band gap tuning by quantum well disordering in $In_{0.53}Ga_{0.47}As/InGaAsP(Q1.25)$ quantum well structure has been investigated using photoluminescence. The threshold temperature for the blue shift was about $750^{\circ}C$ , and the blue shift became larger as the annealing temperature increased. $SiO_2$ showed saturation as the annealing temperature increased. $SiN_x$caused larger blue shift than $SiO_2$, which is considered to be related to the low growth temperature of $SiN_x$. The diffusion of P and Ga are thought to be responsible for the blue shift of the $SiN_x$ and $SiO_2$capped quantum well disordering , respectively.
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