Experimental demonstration of a tunable photonic hook by a partially illuminated dielectric microcylinder

Igor V. Minin, Oleg V. Minin, Cheng Yang Liu, Hao De Wei, Yury E. Geints, Alina Karabchevsky

Research output: Contribution to journalArticle

Abstract

In this Letter, we report the experimental observations of a tunable curved photonic nanojet (photonic hook) generated by a 5 µm polydimethylsiloxane microcylinder deposited on a silicon substrate and illuminated by 405 nm laser beam. A moveable opaque aluminum-mask is mounted in front of the microcylinder implementing partial illumination and imparting spatial curvature to the photonic nanojet. Experimental results of main parameters (tilt angle, width, and intensity) of emerging photonic hooks exhibit close agreement with numerical predictions of the near-field optical structures. The experimentally measured full widths at half-maximum of photonic hooks are 0.48λ, 0.56λ, and 0.76λ for tilt angles of θ = 0, 5.7, and 20.1, respectively. Photonic hooks possess great potential in complex manipulation such as super-resolution imaging, surface fabrication, and optomechanical manipulation along curved trajectories.

Original languageEnglish
Pages (from-to)4899-4902
Number of pages4
JournalOptics Letters
Volume45
Issue number17
DOIs
Publication statusPublished - 1 Sep 2020

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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