Overcoming refractive index limit of mesoscale light focusing by means of specular-reflection photonic nanojet

Yury E. Geints, Alexander A. Zemlyanov, Igor V. Minin, Oleg V. Minin

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The physical origin of subwavelength photonic nanojet in specular-reflection mode (s-PNJ) is theoretically considered. This specific type of photonic nanojet (PNJ) emerges upon double focusing of a plane optical wave by a transparent dielectric microparticle located near a flat mirror. For the first time, to the best of our knowledge, we report a unique property of s-PNJ for increasing its focal length and intensity using circular-shaped microparticles with a refractive index ratio exceeding the known limiting value that fundamentally distinguishes s-PNJ from regular PNJ behavior. This may drastically increase the trapping potential of PNJ-based optical tweezers.

Original languageEnglish
Pages (from-to)3885-3888
Number of pages4
JournalOptics Letters
Volume45
Issue number14
DOIs
Publication statusPublished - 15 Jul 2020

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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