Engineering of AlGaN-Delta-GaN Quantum-Well Gain Media for Mid- and Deep-Ultraviolet Lasers

Jing Zhang, Nelson Tansu
2013 IEEE Photonics Journal  
The gain characteristics of AlGaN-delta-GaN quantum wells (QWs) with varying delta-GaN positions and AlGaN QW compositions are analyzed. The use of optimized AlGaN-delta-GaN QWs resulted in $7-times increase in material gain over that of conventional AlGaN QWs for gain media emitting at $240 nm. By employing asymmetric AlGaNdelta-GaN QWs, the optimized optical gain can be achievable for AlGaN-delta-GaN QW structure with realistic design applicable for mid-and deep-ultraviolet (UV) lasers. The
more » ... (UV) lasers. The threshold properties and differential gains are also studied for optimized AlGaN-delta-GaN QWs UV lasers.
doi:10.1109/jphot.2013.2248705 fatcat:tyuvbgrynngbfd42whmhpklcji