Sub-wavelength photonic hooks generated in photonic chips with asymmetric array of Si3N4 micropillars

Aneesh Vincent Veluthandath; Ganapathy Senthil Murugan

doi:10.1117/12.3016709

10 June 2024 Sub-wavelength photonic hooks generated in photonic chips with asymmetric array of Si₃N₄ micropillars

Aneesh Vincent Veluthandath, Ganapathy Senthil Murugan

Proceedings Volume 12991, Nanophotonics X; 1299104 (2024) https://doi.org/10.1117/12.3016709
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

Photonic hooks, akin to curved photonic nanojets, result from introducing asymmetry in refractive index distribution, achieved by using asymmetric particles or masking the illumination path. These structures function similarly to Airy beams, enabling particle manipulation and imaging. We propose a planar photonic chip design generating subwavelength-width photonic hooks. Illuminating three Si₃N₄micro-pillars with a 532 nm TE polarized plane wave—comprising one λ-wide and two λ/3-wide—produces intense photonic hooks above the micro-pillars, with a 0.7 λ FWHM. The larger pillar, separated by 2λ from the smaller ones, which are λ/3 apart, influences hook properties and optical forces. This offers potential advancements in nanophotonics and microfluidic systems integration.

Conference Presentation

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

Citation Download Citation

Aneesh Vincent Veluthandath and Ganapathy Senthil Murugan "Sub-wavelength photonic hooks generated in photonic chips with asymmetric array of Si₃N₄ micropillars", Proc. SPIE 12991, Nanophotonics X, 1299104 (10 June 2024); https://doi.org/10.1117/12.3016709

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