Two-dimensional photonic crystal phosphor with TiO2 backbone for efficient and polarization-insensitive absorption of excitation photons

Hansol Lee; Tae-Yun Lee; Yeonsang Park; Kyung-Sang Cho; Young-Geun Roh; Hyuck Choo; Heonsu Jeon

doi:10.1117/12.2649597

24 March 2023 Two-dimensional photonic crystal phosphor with TiO₂ backbone for efficient and polarization-insensitive absorption of excitation photons

Hansol Lee, Tae-Yun Lee, Yeonsang Park, Kyung-Sang Cho, Young-Geun Roh, Hyuck Choo, Heonsu Jeon

Author Affiliations +

Proceedings Volume PC12431, Photonic and Phononic Properties of Engineered Nanostructures XIII; PC124310B (2023) https://doi.org/10.1117/12.2649597
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

Photonic crystal (PhC) phosphor is a paradigm-shifting structural platform that the authors’ group has developed. In this study, two major changes are introduced to the existing two-dimensional PhC phosphor: an increase in the refractive index contrast by replacing the PhC backbone material and the planarization of phosphor surface by the squeegee method. Compared with the reference phosphor, the upgraded PhC phosphor exhibits ~59 times enhanced absorption (simulated) and ~7 times enhanced phosphor emission (experimental). Although already impressive, the huge gap between theory and experiment indicates ample room for further improvement through, for example, the refinements in device fabrication.

Conference Presentation

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Hansol Lee, Tae-Yun Lee, Yeonsang Park, Kyung-Sang Cho, Young-Geun Roh, Hyuck Choo, and Heonsu Jeon "Two-dimensional photonic crystal phosphor with TiO₂ backbone for efficient and polarization-insensitive absorption of excitation photons", Proc. SPIE PC12431, Photonic and Phononic Properties of Engineered Nanostructures XIII, PC124310B (24 March 2023); https://doi.org/10.1117/12.2649597

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