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

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 language	English
Pages (from-to)	3885-3888
Number of pages	4
Journal	Optics Letters
Volume	45
Issue number	14
DOIs	https://doi.org/10.1364/OL.398367
Publication status	Published - 15 Jul 2020

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1364/OL.398367

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@article{54629ebf9d8d48849201b674ac71139f,

title = "Overcoming refractive index limit of mesoscale light focusing by means of specular-reflection photonic nanojet",

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.",

author = "Geints, {Yury E.} and Zemlyanov, {Alexander A.} and Minin, {Igor V.} and Minin, {Oleg V.}",

year = "2020",

month = jul,

day = "15",

doi = "10.1364/OL.398367",

language = "English",

volume = "45",

pages = "3885--3888",

journal = "Optics Letters",

issn = "0146-9592",

publisher = "The Optical Society",

number = "14",

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T1 - Overcoming refractive index limit of mesoscale light focusing by means of specular-reflection photonic nanojet

AU - Geints, Yury E.

AU - Zemlyanov, Alexander A.

AU - Minin, Igor V.

AU - Minin, Oleg V.

PY - 2020/7/15

Y1 - 2020/7/15

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AB - 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.

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