High-purity, highly directional resonant cavity light-emitting diode integrated with tunable metasurface for plant illumination

Hongshen Zeng; Huamao Huang

doi:10.1117/12.3034306

5 July 2024 High-purity, highly directional resonant cavity light-emitting diode integrated with tunable metasurface for plant illumination

Hongshen Zeng, Huamao Huang

Author Affiliations +

Proceedings Volume 13183, International Conference on Optoelectronic Information and Functional Materials (OIFM 2024); 1318317 (2024) https://doi.org/10.1117/12.3034306
Event: The 3rd International Conference on Optoelectronic Information and Functional Materials (OIFM 2024), 2024, Wuhan, China

Abstract

Light quality and controllability are crucial factors in plant illumination, posing challenges such as formulating precise light environment and achieving accurate micro-zone lighting. To address these issues, we proposed a resonant cavity light-emitting diode (RCLED) device that incorporates a resonant cavity reflector (RCR) and a metasurface, offering advantages such as high purity and highly directional emission. The RCR, composed of various pairs of distributed Bragg reflectors, was investigated to narrow the full-width at half-maximum (FWHM) of the emitting spectrum, thereby improving the purity. A traditional beam-splitting metasurface was designed to achieve directional emission of the linearly polarized light beam. However, traditional devices with fixed directional emission limit their adaptability. We leverage the Moiré effect to design a two-cascaded metasurfaces system. This device enables tunable deflection angle of the output beam, providing greater flexibility and control. Compared to tradition RCLEDs, our angle-tunable RCR-RCLED with two cascaded metasurfaces boasts a one-third FWHM. Compared to RCR-RCLED integrated with a tradition metasurface, our device has a tunable deflection angle.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Hongshen Zeng and Huamao Huang "High-purity, highly directional resonant cavity light-emitting diode integrated with tunable metasurface for plant illumination", Proc. SPIE 13183, International Conference on Optoelectronic Information and Functional Materials (OIFM 2024), 1318317 (5 July 2024); https://doi.org/10.1117/12.3034306

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KEYWORDS

Light sources and illumination

Light emitting diodes

3D modeling

Mirrors

Polarized light

Integrated modeling

Moire patterns

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