Optical properties of light emitting diodes with a cascading plasmonic grating

Chih Ming Wang, Yao Lin Tsai, Sheng Han Tu, Chien Chieh Lee, Cheng Huang Kuo, Jenq Yang Chang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


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.

Original languageEnglish
Pages (from-to)25608-25614
Number of pages7
JournalOptics Express
Issue number25
StatePublished - 6 Dec 2010


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