Materials, Photonic Devices, and Sensors

Influence of low-contrast subwavelength grating shape on polarization characteristics of GaN-based light-emitting diode emissions

[+] Author Affiliations
Yuusuke Takashima, Ryo Shimizu

Tokushima University, Graduate School of Advanced Technology and Science, 2-1 Minami-josanjima, Tokushima 770-8506, Japan

Masanobu Haraguchi, Yoshiki Naoi

Tokushima University, Graduate School of Advanced Technology and Science, 2-1 Minami-josanjima, Tokushima 770-8506, Japan

Tokushima University, Institute of Technology and Science, 2-1 Minami-josanjima, Tokushima 770-8506, Japan

Opt. Eng. 54(6), 067112 (Jun 24, 2015). doi:10.1117/1.OE.54.6.067112
History: Received March 17, 2015; Accepted June 2, 2015
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Abstract.  We analytically investigated the influence of grating shape on polarization characteristics of the emission from a GaN-based light-emitting diode with a low-contrast subwavelength grating (SWG), such as SiO2-SWG. The electromagnetic field distribution, calculated using the finite-difference time-domain method, predicted that the polarization characteristics strongly depend on the grating side slope. A trapezoid SiO2-SWG was fabricated on the GaN-based-LED using electron-beam lithography. The optical characteristics of the electroluminescence agreed with those theoretically predicted, and we succeeded in demonstrating the influence of grating shape on the polarization of LED emission.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Yuusuke Takashima ; Ryo Shimizu ; Masanobu Haraguchi and Yoshiki Naoi
"Influence of low-contrast subwavelength grating shape on polarization characteristics of GaN-based light-emitting diode emissions", Opt. Eng. 54(6), 067112 (Jun 24, 2015). ; http://dx.doi.org/10.1117/1.OE.54.6.067112


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