Optical studies in Bragg reflectors with absorbing layers

• Main Authors: Liu. HSIEH-CHUNG, 劉學中
• Other Authors: Shen. Ji-Lin
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/14042978547313951071

碩士 === 中原大學 === 物理學系 === 88 === Reflectivity and photoluminescence studies on the GaAs/AlAs Bragg mirror with the InGaAs/InGaAsP multiple-quantum-well absorbing layer were performed. An absorption dip enhanced by the optical confinement of the Fabry-Perot resonance was observed in the reflectivity spectra. The absorption intensity of the Fabry-Perot mode increases with increasing temperature and can be explained by the resonant coincidence of the Fabry-Perot cavity mode and the center of the stop band of the Bragg mirror. The photoluminescence studies provide a vehicle for obtaining the absorption coefficient of the cavity medium by measuring the quality factor of the Fabry-Perot mode. The refractive indexes of the Bragg mirror and cover layer were fitted by tuning the angle of incidence (in reflectivity) and angle of detection (in photoluminescence), respectively.