Coherent scattering in hybrid GaN meta-surfaces with ZnO nanoantennae

Sween Butler; Zhuang Miao; Arup Neogi

doi:10.1117/12.3004322

9 March 2024 Coherent scattering in hybrid GaN meta-surfaces with ZnO nanoantennae

Sween Butler, Zhuang Miao, Arup Neogi

Proceedings Volume PC12886, Gallium Nitride Materials and Devices XIX; PC128860J (2024) https://doi.org/10.1117/12.3004322
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

Nonlinear optical microcavity structures within GaN meta-surfaces monolithically integrated with ZnO nanoantennae form an ideal platform for realizing tunable nanophotonic sources and directional emitters. Highly efficient second harmonic generation (SHG) is demonstrated from GaN micro-pyramids selectively grown on a wafer-scale substrate to form a meta-surface with ZnO nanoantennae at the tip of each pyramid. The nonlinear light generation from this cavity-based antenna depends on the relative competition of the second and third-order nonlinear process. The selective excitation of a single nanoantenna within the meta-structure can control the nonlinear light generation process. The energy density and frequency of the excitation source compared to the semiconductor's bandgap influences the coherent scattering and directionality of the emission process from the excitation of the meta-structure. The efficiency and directionality of the SHG signal depend on the localized spatial excitation of the ZnO nanorod and GaN micro-pyramid.

Conference Presentation

Citation Download Citation

Sween Butler, Zhuang Miao, and Arup Neogi "Coherent scattering in hybrid GaN meta-surfaces with ZnO nanoantennae", Proc. SPIE PC12886, Gallium Nitride Materials and Devices XIX, PC128860J (9 March 2024); https://doi.org/10.1117/12.3004322

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