Polarization-controlled single-mode photonic-crystal VCSEL

Tian Cao; Chen Xu; Simin Wei; Yiyang Xie; Mingming Mao

doi:10.1117/12.917679

22 February 2012 Polarization-controlled single-mode photonic-crystal VCSEL

Tian Cao, Chen Xu, Simin Wei, Yiyang Xie, Mingming Mao

Proceedings Volume 8333, Photonics and Optoelectronics Meetings (POEM) 2011: Optoelectronic Devices and Integration; 83330L (2012) https://doi.org/10.1117/12.917679
Event: Photonics and Optoelectronics Meetings 2011, 2011, Wuhan, China

Abstract

We investigated photonic crystal vertical cavity surface emitting laser with elliptical air holes,which can produce a circular beam with standard substrates in a relatively easy fabrication process.Because of the elliptical air holes,the mutually perpendicular directions of photonic crystal have different effective index,the photonic crystal cavity has highly birefringent.Normal photonic crystal VCSELs send single mode laser,and the basic mode was orthogonal double degennerate state.The polarized direction could change easily.If we used elliptical air holes to break the symmetric structure of photonic crystal,because of the highly birefringent,one of polarization modes was frustrated,only one polarized mode could transmit.We introduced elliptical air holes in the top mirror and get polarization controlled laser.The spacing between air holes was 4μm and the dimentions of the elliptical air holes were 2.0μm×1.4μm.The polarization controlled photonic crystal vertical-cavity surface-emitting laser shows side mode suppression ratio(SMSR) over 30dB,and controlled the polarization of laser in one direction.

Citation Download Citation

Tian Cao, Chen Xu, Simin Wei, Yiyang Xie, and Mingming Mao "Polarization-controlled single-mode photonic-crystal VCSEL", Proc. SPIE 8333, Photonics and Optoelectronics Meetings (POEM) 2011: Optoelectronic Devices and Integration, 83330L (22 February 2012); https://doi.org/10.1117/12.917679

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