Enhancing the light extraction efficiency of AlInN nanowire ultraviolet light-emitting diodes with photonic crystal structures
| Autor: | Thang Van Le, Barsha Jain, Thi Tan Pham, Moses Tumuna, Ha Quoc Thang Bui, Hieu Pham Trung Nguyen, Anh Viet Hoang, Renjie Wang, Ravi Teja Velpula, Jeffrey Jude |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Ultraviolet light emitting diodes Nanowire Physics::Optics 02 engineering and technology medicine.disease_cause 01 natural sciences law.invention 010309 optics Condensed Matter::Materials Science Optics law 0103 physical sciences medicine Photonic crystal Diode business.industry Extraction (chemistry) Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics Light emission 0210 nano-technology business Ultraviolet Light-emitting diode |
| Zdroj: | Optics express. 28(15) |
| ISSN: | 1094-4087 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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