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Title: | When Plasmonic Colloids Meet Optical Vortices - A Brief Review |
Authors: | KUMAR, G. V. PAVAN Dept. of Physics |
Keywords: | Optical Vortices Plasmonic Colloids Optical Scattering Absorption 2023-JUN-WEEK4 TOC-JUN-2023 2023 |
Issue Date: | Jul-2023 |
Publisher: | Council Of Scientific And Industrial Research–National Institute Of Science Communication and Policy Research |
Citation: | Indian Journal of Pure & Applied Physics, 61, 589-600. |
Abstract: | Structured light has emerged as an important tool to interrogate and manipulate matter at micron and sub-micron scale. One form of structured light is an optical vortex beam. The helical wave front of these vortices carry orbital angular momentum which can be transferred to a Brownian colloid. When the colloid is made of metallic nanostructures, such as silver and gold, resonant optical effects play a vital role, and the interaction leads to complex dynamics and assembly. This brief review aims to discuss some recent work on trapping plasmonic colloids with optical vortices and their lattices. The role of optical scattering and absorption has important implications on the underlying forces and torques, which is specifically enunciated. The effect of spin and orbital angular momentum in an optical vortex can lead to spin-orbit coupling dynamics, and these effects are highlighted with examples from the literature. In addition to assembly and dynamics, enhanced Brownian motion of plasmonic colloids under the influence of a vortex-lattice is discussed. The pedagogical aspects to understand the interaction between optical vortex and plasmonic colloids is emphasized. |
URI: | http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/8064 |
Appears in Collections: | JOURNAL ARTICLES |
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