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Plasmon-assisted optical trapping and anti-trappingстатья
Информация о цитировании статьи получена из
Scopus
Дата последнего поиска статьи во внешних источниках: 4 марта 2026 г.
- Авторы: Ivinskaya Aliaksandra M., Petrov Mihail I., Bogdanov Andrei Andreyevich, Shishkin Ivan I., Ginzburg Pavel B., Shalin Alexander S.
- Сборник: Nature Publishing Group Houndmills Basingstoke
- Том: 6
- Год издания: 2017
- Издательство: Nature Publishing Group Specialist Journals
- Местоположение издательства: Houndmills, Basingstoke, UK, England
- DOI: 10.1038/lsa.2016.258
- Аннотация: The ability to manipulate small objects with focused laser beams has opened a venue for investigating dynamical phenomena relevant to both fundamental and applied science. Nanophotonic and plasmonic structures enable superior performance in optical trapping via highly confined near-fields. In 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 surface. Surface plasmon excitation at the metal substrate plays a key role in tailoring the optical forces acting on a nearby particle. Depending 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 substrates. Furthermore, 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 analyzed. The 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 micro- and nano-scales. © 2017 The Author(s).
- Добавил в систему: Шалин Александр Сергеевич