Wang Chih-Ming, Tsai Yao-Lin, Tu Sheng-Han, Lee Chien-Chieh, Kuo Cheng-Huang, Chang Jenq-Yang
Institute of Opto-electronic Engineering, National Dong Hwa University, Hualien, 97401 Taiwan, China.
Opt Express. 2010 Dec 6;18(25):25608-14. doi: 10.1364/OE.18.025608.
In this paper, the polarization dependent optical properties of InGaN/GaN multi-quantum wells (MQWs) LED with cascading plasmonic gratings are investigated using an angle-resolved photoluminescence (ARPL) spectrometer. The plasmonic gratings consist of two Ag gratings with a half-pitch displacement. The ARPL spectra of the TE-TM state present a broadband emission with resonance dips occasioned by the SP resonance while the TM-TE state presents resonance peaks with low sideband emission. The resonance properties can be tuned by modifying the geometric parameters of the plasmonic grating. The ARPL spectrum of the LED sample with pure GaN 1D grating is also measured and discussed. The investigated plasmonics LED represents resonance optical properties different from the conventional surface relief LED, which can be used in special applications.
在本文中，使用角分辨光致发光（ARPL）光谱仪研究了具有级联等离子体光栅的InGaN/GaN多量子阱（MQW）发光二极管的偏振相关光学特性。等离子体光栅由两个具有半个间距位移的银光栅组成。TE-TM态的ARPL光谱呈现出宽带发射，伴有表面等离子体（SP）共振引起的共振凹陷，而TM-TE态呈现出具有低边带发射的共振峰。可以通过修改等离子体光栅的几何参数来调节共振特性。还测量并讨论了具有纯GaN一维光栅的发光二极管样品的ARPL光谱。所研究的等离子体发光二极管表现出与传统表面起伏发光二极管不同的共振光学特性，可用于特殊应用。
