Nano/micro dual-textured antireflective subwavelength structures in anisotropically etched GaAs

Kyunghwan Kim, Yunwon Song, Jungwoo Oh

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Light trapping by surface texturing is widely used to improve the performance of optoelectronic devices. In this Letter, we demonstrate nano/micro dual-scale textured GaAs by integrating triangular GaAs by orientation-dependent wet etching and subwavelength nanoholes by metal-assisted chemical etching (MacEtch). This is the first report on nano/micro dual-scale textured GaAs. The reflectance was adjusted by controlling the aspect ratio of the nanoholes by varying the MacEtch duration. The combination of the microstructure and subwavelength structures significantly reduced the solar-weighted reflectance of a bare GaAs substrate by 72%.

Original languageEnglish
Pages (from-to)3105-3108
Number of pages4
JournalOptics Letters
Volume42
Issue number16
DOIs
Publication statusPublished - 2017 Aug 15

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etching
reflectance
optoelectronic devices
metals
aspect ratio
trapping
microstructure

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

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abstract = "Light trapping by surface texturing is widely used to improve the performance of optoelectronic devices. In this Letter, we demonstrate nano/micro dual-scale textured GaAs by integrating triangular GaAs by orientation-dependent wet etching and subwavelength nanoholes by metal-assisted chemical etching (MacEtch). This is the first report on nano/micro dual-scale textured GaAs. The reflectance was adjusted by controlling the aspect ratio of the nanoholes by varying the MacEtch duration. The combination of the microstructure and subwavelength structures significantly reduced the solar-weighted reflectance of a bare GaAs substrate by 72{\%}.",
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Nano/micro dual-textured antireflective subwavelength structures in anisotropically etched GaAs. / Kim, Kyunghwan; Song, Yunwon; Oh, Jungwoo.

In: Optics Letters, Vol. 42, No. 16, 15.08.2017, p. 3105-3108.

Research output: Contribution to journalArticle

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