Piezoelectric and thermal effects on optical properties of violet-blue InGaN lasers

Sheng-Horng Yen; Bo-Ting Liou; Mei-Ling Chen; Yen-Kuang Kuo

doi:10.1117/12.575319

20 January 2005 Piezoelectric and thermal effects on optical properties of violet-blue InGaN lasers

Sheng-Horng Yen, Bo-Ting Liou, Mei-Ling Chen, Yen-Kuang Kuo

Proceedings Volume 5628, Semiconductor Lasers and Applications II; (2005) https://doi.org/10.1117/12.575319
Event: Photonics Asia, 2004, Beijing, China

Abstract

The optical properties of the violet-blue InGaN quantum-well lasers with an emission wavelength of 400-480 nm are studied with a LASTIP simulation program. Assuming that the In_xGa_1-xN/In_yGa_1-yN heterostructure has a band-offset ratio of 7/3, our simulation results indicate that the use of an AlGaN blocking layer can help reduce the electronic current overflow, and the non-uniform carrier distribution in the quantum wells plays an important role in the laser performance. If the piezoelectric effect is taken into account, the lowest threshold current of the violet-blue InGaN quantum-well lasers is obtained when the number of InGaN well layers is two if the emission wavelength is shorter than 412 nm, and one if the emission wavelength is longer than 412 nm. At a laser wavelength of 478 nm, the slope efficiency of the InGaN single quantum-well laser is decreased by ~2.4% and that of the double quantum-well laser is decreased by ~13.9% when the thermal effect is taken into account.

Citation Download Citation

Sheng-Horng Yen, Bo-Ting Liou, Mei-Ling Chen, and Yen-Kuang Kuo "Piezoelectric and thermal effects on optical properties of violet-blue InGaN lasers", Proc. SPIE 5628, Semiconductor Lasers and Applications II, (20 January 2005); https://doi.org/10.1117/12.575319

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