Enhancing the light extraction efficiency of AlInN nanowire ultraviolet light-emitting diodes with photonic crystal structures

Barsha Jain, Ravi Teja Velpula, Moses Tumuna, Ha Quoc Thang Bui, Jeffrey Jude, Thi T.A.N. Pham, Thang V.A.N. Le, Anh Viet Hoang, Renjie Wang, Hieu Pham Trung Nguyen

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, AlInN nanowire ultraviolet light-emitting diodes (LEDs) with emission at ∼299 nm have been successfully demonstrated. We have further studied the light extraction properties of these nanowire LEDs using photonic crystal structures with square and hexagonal lattices of nanowires. The light extraction efficiency (LEE) of the periodic nanowire LED arrays was found to be significantly increased as compared to random nanowire LEDs. The LEEs reach ∼ 56%, and ∼ 63% for the square and hexagonal photonic crystal-based nanowire structures, respectively. Moreover, highly transverse-magnetic polarized emission was observed with dominant vertical light emission for the AlInN nanowire ultraviolet LEDs.

Original languageEnglish (US)
Pages (from-to)22908-22918
Number of pages11
JournalOptics Express
Volume28
Issue number15
DOIs
StatePublished - Jul 20 2020

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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