Studies of Semiconductor Quantum Wire Lasers

• Main Authors: Chia-Ying Lu, 呂佳穎
• Other Authors: Chien-Ping Lee
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/r95243

碩士 === 國立交通大學 === 電子工程系所 === 92 === Theoretical studies have reported that the 1-D valence subbands cannot be labeled as heavy-hole (hh) band and light-hole (lh) band because the hh and lh bands are strongly mixed. This mixing causes strong polarization anisotropy in the emission and absorption spectra with respect to the direction of electric field parallel or perpendicular to the wire. In this study, we mainly investigated the effect of the polarization anisotropy in quantum wires (QWrs) lasers. For this, two kinds of contact stripes with different direction were made： One with the contact stripes aligned to , and another with the contact stripes aligned to .Moreover, the direction of the QWrs is along . In order to study the effect of the polarization anisotropy in QWrs lasers, the temperature dependent L-I curve, Laser spectrum, and polarization dependent photoluminescence were measured. The results did show the existing of the effect of the polarization anisotropy in our QWrs lasers. The threshold current and laser emission wavelength were totally different for the QWrs Laser with different contact stripes direction. Besides, other interesting and strange phenomena were observed in our study and they were discussed in later chapter. In the future, we hope these interesting and strange phenomena could be used for the device application.