Please use this identifier to cite or link to this item: https://doi.org/10.1364/OE.20.011574
Title: First principles study of Bismuth alloying effects in GaAs saturable absorber
Authors: Li, D.
Yang, M. 
Zhao, S.
Cai, Y. 
Feng, Y. 
Issue Date: 7-May-2012
Citation: Li, D., Yang, M., Zhao, S., Cai, Y., Feng, Y. (2012-05-07). First principles study of Bismuth alloying effects in GaAs saturable absorber. Optics Express 20 (10) : 11574-11580. ScholarBank@NUS Repository. https://doi.org/10.1364/OE.20.011574
Abstract: First principles hybrid functional calculations have been carried out to study electronic properties of GaAs with Bi alloying effects. It is found that the doping of Bi into GaAs reduces the bandgap due to the intraband level repulsions between Bi induced states and host states, and the Bi-related impurity states originate from the hybridization of Bi-6p and its nearest As-4p orbitals. With the increase of Bi concentration in GaAs, the bandgap decreases monotonously. The calculated optical properties of the undoped and Bi-doped GaAs are similar except the shift toward lower energy of absorption edge and main absorption peaks with Bi doping. These results suggest a promising application of GaBixAs1-x alloy as semiconductor saturable absorber in Q-switched or mode-locked laser. © 2012 Optical Society of America.
Source Title: Optics Express
URI: http://scholarbank.nus.edu.sg/handle/10635/96642
ISSN: 10944087
DOI: 10.1364/OE.20.011574
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