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Overcoming optical contrast limit of mesoscale light focusing by means of retrograde-reflection photonic nanojet

The physical origin of subwavelength photonic nanojet in retrograde-reflection mode (retro-PNJ) is theoretically considered. This specific type of photonic nanojet emerges upon sequential double focusing of a plane optical wave by a transparent dielectric microparticle located near a flat reflecting mirror. For the first time to the best of our knowledge, we report a unique property of retro-PNJ for increasing its focal length and intensity using microparticles with the optical contrast exceeding limiting value (n > 2) that fundamentally distinguishes retro-PNJ from regular PNJ behavior. This may drastically increase the trapping potential of PNJ-based optical tweezers.

preprint2020arXivOpen access
Yury E. GeintsAlexander A. ZemlyanovIgor V. MininOleg V. Minin
physics.optics
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Open access4 authors1 topic
Imported metadata coverageMissing code, dataset, citation and institution fields are tracked without dominating the paper.Details
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Yury E. GeintsAlexander A. ZemlyanovIgor V. MininOleg V. Minin

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