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Plasmon-assisted optical trapping and anti-trapping

Light(Science & Applications) 2016年第1期5卷 52-57页

作者： Aliaksandra Ivinskaya Mihail I Petrov Andrey A Bogdanov ivan shishkin Pavel Ginzburg Alexander S Shalin Department of Nanophotonics and Metamaterials ITMO UniversityBirzhevaja Line14199034 St PetersburgRussia School of Electrical Engineering Tel Aviv UniversityRamat AvivTel Aviv 69978Israel Kotel’nikov Institute of Radio Engineering and Electronics of Russian Academy of Sciences(Ulyanovsk branch) Goncharova Street 48/2432071 UlyanovskRussia Ulyanovsk State University Lev Tolstoy Street 42432017 UlyanovskRussia

The ability to manipulate small objects with focused laser beams has opened a venue for investigating dynamical phenomena relevant to both fundamental and applied *** and plasmonic structures enable superior performance in optical trapping via highly confined *** this case,the interplay between the excitation field,re-scattered fields and the eigenmodes of a structure can lead to remarkable effects;one such effect,as reported here,is particle trapping by laser light in a vicinity of metal *** plasmon excitation at the metal substrate plays a key role in tailoring the optical forces acting on a nearby *** on whether the illuminating Gaussian beam is focused above or below the metal-dielectric interface,an order-of-magnitude enhancement or reduction of the trap stiffness is achieved compared with that of standard glass ***,a novel plasmon-assisted anti-trapping effect(particle repulsion from the beam axis)is predicted and studied.A highly accurate particle sorting scheme based on the new anti-trapping effect is *** ability to distinguish and configure various electromagnetic channels through the developed analytical theory provides guidelines for designing auxiliary nanostructures and achieving ultimate control over mechanical motion at the microand nano-scales.

关键词： Gaussian beam Green’s function optical forces optical tweezers surface plasmon

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Modifying light–matter interactions with perovskite nanocrystals inside antiresonant photonic crystal fiber

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Photonics Research 2021年第8期9卷 1462-1469页

作者： ANDREY A.MACHNEV ANATOLY P.PUSHKAREV PAVEL TONKAEV ROMAN E.NOSKOV KRISTINA R.RUSIMOVA PETER J.MOSLEY SERGEY V.MAKAROV PAVEL B.GINZBURG ivan I.shishkin School of Electrical Engineering Tel Aviv UniversityTel Aviv 69978Israel Department of Physics and Engineering ITMO UniversitySaint Petersburg 197101Russia Centre for Photonics and Photonic Materials Department of PhysicsUniversity of BathBath BA27AYUK Photonics and 2D Materials Moscow Institute of Physics and TechnologyDolgoprudny 141700Russia

Structured environments are employed in a plethora of applications to tailor dynamics of light–matter interaction processes by modifying the structure of electromagnetic *** promising example of such a system is antiresonant photonic crystal fibers(AR-PCFs),which allow light–analyte interactions in a very long *** we probe contribution of microstructuring and nontrivial mode hierarchy on light–matter interactions in AR-PCFs by investigating lifetime shortening of perovskite(CsPbBr3)nanocrystals grown to fiber *** crystals have been deposited using a wet chemistry approach and then excited by a supercontinuum source in the 450–500 nm *** spectra have been measured and analyzed via the time-correlated single photon counting(TCSPC)technique,unravelling contributions of core and cladding *** lifetime imaging inside an AR-PCF enables mapping input of various electromagnetic channels into light–matter interaction *** results pave the way for tailoring the dynamics of high-order quantum processes,promoting the concept of AR-PCF as a light-driven reactor.

关键词： fiber light resonant

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