Blue GaN-based vertical cavity surface emitting lasers by CW current injection at 77K

H. C. Kuo; S. W. Chen; T. T. Kao; C. C. Kao; J. R. Chen; T. C. Lu; S. C. Wang

doi:10.1117/12.808644

16 February 2009 Blue GaN-based vertical cavity surface emitting lasers by CW current injection at 77K

H. C. Kuo, S. W. Chen, T. T. Kao, C. C. Kao, J. R. Chen, T. C. Lu, S. C. Wang

Proceedings Volume 7216, Gallium Nitride Materials and Devices IV; 72161A (2009) https://doi.org/10.1117/12.808644
Event: SPIE OPTO: Integrated Optoelectronic Devices, 2009, San Jose, California, United States

Abstract

In the paper, we describe the fabrication and performance characteristics of GaN-based vertical-cavity surface-emitting lasers (VCSELs) by optical pumping and current injection. According to the employment of high-quality and high-reflectivity AlN/GaN DBRs in the whole structure, the lasing action of optically pumped GaN-based VCSELs with hybrid mirrors has been observed at room temperature. Due to the excellent results of optically pumped GaN-based VCSELs with hybrid mirrors, we further demonstrated the lasing behavior of GaN-based VCSELs by continuous-wave current injection at 77 K. The laser has one dominated blue wavelength located at 462 nm with a linewidth of about 0.15 nm and the threshold injection current at 1.4 mA. The divergence angle and polarization ratio of the GaN-based VCSELs with hybrid mirrors are about 11.7° and 80%, respectively. A larger spontaneous coupling efficiency of about 7.5×10^-2 was also measured.

Citation Download Citation

H. C. Kuo, S. W. Chen, T. T. Kao, C. C. Kao, J. R. Chen, T. C. Lu, and S. C. Wang "Blue GaN-based vertical cavity surface emitting lasers by CW current injection at 77K", Proc. SPIE 7216, Gallium Nitride Materials and Devices IV, 72161A (16 February 2009); https://doi.org/10.1117/12.808644

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