Rotation of an elliptical dielectric particle in the focus of a circularly polarized Gaussian beam
A force and a torque exerted on an elliptical dielectric particle in the focus of a spherical circularly polarized laser beam are considered. The numerical simulation is conducted using a diffraction field obtained by an FDTD method, with the force and torque derived using a Maxwell’s stress tensor....
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Samara National Research University
2020-08-01
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| Series: | Компьютерная оптика |
| Subjects: | |
| Online Access: | http://computeroptics.smr.ru/KO/PDF/KO44-4/440409.pdf |
| _version_ | 1818609998741110784 |
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| author | A.G. Nalimov S.S. Stafeev |
| author_facet | A.G. Nalimov S.S. Stafeev |
| author_sort | A.G. Nalimov |
| collection | DOAJ |
| description | A force and a torque exerted on an elliptical dielectric particle in the focus of a spherical circularly polarized laser beam are considered. The numerical simulation is conducted using a diffraction field obtained by an FDTD method, with the force and torque derived using a Maxwell’s stress tensor. It is shown that an optical torque is exerted on the center of an elliptical particle put in the focus of a circularly polarized spherical wave, making it rotate around the optical axis. The rotation occurs when the elliptical microparticle is situated in a transverse plane to the optical axis. When shifting the ellipsoid from the optical axis, an optical trapping force appears that prevents its displacement, meaning that the particle finds itself in an optical trap on the optical axis. |
| first_indexed | 2024-12-16T15:07:27Z |
| format | Article |
| id | doaj.art-270ef5a92a2e4011a8846e3b1185f1a1 |
| institution | Directory Open Access Journal |
| issn | 0134-2452 2412-6179 |
| language | English |
| last_indexed | 2024-12-16T15:07:27Z |
| publishDate | 2020-08-01 |
| publisher | Samara National Research University |
| record_format | Article |
| series | Компьютерная оптика |
| spelling | doaj.art-270ef5a92a2e4011a8846e3b1185f1a12022-12-21T22:27:03ZengSamara National Research UniversityКомпьютерная оптика0134-24522412-61792020-08-0144456156710.18287/2412-6179-CO-693Rotation of an elliptical dielectric particle in the focus of a circularly polarized Gaussian beamA.G. Nalimov0S.S. Stafeev1https://orcid.org/0000-0002-7008-8007IPSI RAS – Branch of the FSRC "Crystallography and Photonics" RAS, Molodogvardeyskaya 151, 443001, Samara, Russia; Samara National Research University, Moskovskoye Shosse 34, 443086, Samara, RussiaIPSI RAS – Branch of the FSRC "Crystallography and Photonics" RAS, Molodogvardeyskaya 151, 443001, Samara, Russia; Samara National Research University, Moskovskoye Shosse 34, 443086, Samara, RussiaA force and a torque exerted on an elliptical dielectric particle in the focus of a spherical circularly polarized laser beam are considered. The numerical simulation is conducted using a diffraction field obtained by an FDTD method, with the force and torque derived using a Maxwell’s stress tensor. It is shown that an optical torque is exerted on the center of an elliptical particle put in the focus of a circularly polarized spherical wave, making it rotate around the optical axis. The rotation occurs when the elliptical microparticle is situated in a transverse plane to the optical axis. When shifting the ellipsoid from the optical axis, an optical trapping force appears that prevents its displacement, meaning that the particle finds itself in an optical trap on the optical axis.http://computeroptics.smr.ru/KO/PDF/KO44-4/440409.pdflight forceoptical torqueoptical tweezersmaxwell’s stress tensorrotation |
| spellingShingle | A.G. Nalimov S.S. Stafeev Rotation of an elliptical dielectric particle in the focus of a circularly polarized Gaussian beam Компьютерная оптика light force optical torque optical tweezers maxwell’s stress tensor rotation |
| title | Rotation of an elliptical dielectric particle in the focus of a circularly polarized Gaussian beam |
| title_full | Rotation of an elliptical dielectric particle in the focus of a circularly polarized Gaussian beam |
| title_fullStr | Rotation of an elliptical dielectric particle in the focus of a circularly polarized Gaussian beam |
| title_full_unstemmed | Rotation of an elliptical dielectric particle in the focus of a circularly polarized Gaussian beam |
| title_short | Rotation of an elliptical dielectric particle in the focus of a circularly polarized Gaussian beam |
| title_sort | rotation of an elliptical dielectric particle in the focus of a circularly polarized gaussian beam |
| topic | light force optical torque optical tweezers maxwell’s stress tensor rotation |
| url | http://computeroptics.smr.ru/KO/PDF/KO44-4/440409.pdf |
| work_keys_str_mv | AT agnalimov rotationofanellipticaldielectricparticleinthefocusofacircularlypolarizedgaussianbeam AT ssstafeev rotationofanellipticaldielectricparticleinthefocusofacircularlypolarizedgaussianbeam |