Improving optical coherence of light-emitting diodes by surface plasmons via shallow-etched conic pit array.
Opt Express
; 31(24): 39953-39964, 2023 Nov 20.
Article
em En
| MEDLINE
| ID: mdl-38041307
ABSTRACT
We propose the coupling of multiple quantum wells and surface plasmons can improve coherence of light emitted from LED wafers, as evidenced herein by a shallow-etched conic pit array with evaporated Ag (V-Ag) on a GaN-based LED wafer. The improvement in spatial coherence is critically verified by angle-resolved spectra. The temporal coherence length of the V-Ag wafer is 1.4 times larger than that of the plain wafer. The coherence-enhanced wafer achieves anisotropic and deflective emission in micro area and at far field by diffraction. This research provides a novel perspective on research of plasmonic LEDs and a new straightforward architecture to acquire partially coherent light from LEDs.
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MEDLINE
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En
Ano de publicação:
2023
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Article