Minimal Focal Spot Size Measured Based on Intensity and Power Flow
It is shown, theoretically and numerically, that the distributions of the longitudinal energy flow for tightly focused light with circular and linear polarization are the same, and that the spot has circular symmetry. It is also shown that the longitudinal energy flows are equal for optical vortices...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-08-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/16/5505 |
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| author | Victor V. Kotlyar Sergey S. Stafeev Vladislav D. Zaitsev |
| author_facet | Victor V. Kotlyar Sergey S. Stafeev Vladislav D. Zaitsev |
| author_sort | Victor V. Kotlyar |
| collection | DOAJ |
| description | It is shown, theoretically and numerically, that the distributions of the longitudinal energy flow for tightly focused light with circular and linear polarization are the same, and that the spot has circular symmetry. It is also shown that the longitudinal energy flows are equal for optical vortices with unit topological charge and with radial or azimuthal polarization. The focal spot has a minimum diameter (all other characteristics being equal), which is measured based on the intensity of an optical vortex with azimuthal polarization. The diameter of the focal spot calculated from the energy flow for light with circular or linear polarization is slightly larger (by a fraction of a percentage). The magnitude of the diameter based on the intensity plays a role in the interaction of light with matter, and the magnitude of the diameter based on the energy flux affects the resolution in optical microscopy which is crucial in sensorial applications. |
| first_indexed | 2024-03-10T08:24:42Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T08:24:42Z |
| publishDate | 2021-08-01 |
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| record_format | Article |
| series | Sensors |
| spelling | doaj.art-bdfcf81b210e4de9a35aa6ca89dff9052023-11-22T09:40:55ZengMDPI AGSensors1424-82202021-08-012116550510.3390/s21165505Minimal Focal Spot Size Measured Based on Intensity and Power FlowVictor V. Kotlyar0Sergey S. Stafeev1Vladislav D. Zaitsev2IPSI RAS—Branch of the FSRC “Crystallography and Photonics” RAS, Molodogvardeyskaya 151, 443001 Samara, RussiaIPSI RAS—Branch of the FSRC “Crystallography and Photonics” RAS, Molodogvardeyskaya 151, 443001 Samara, RussiaIPSI RAS—Branch of the FSRC “Crystallography and Photonics” RAS, Molodogvardeyskaya 151, 443001 Samara, RussiaIt is shown, theoretically and numerically, that the distributions of the longitudinal energy flow for tightly focused light with circular and linear polarization are the same, and that the spot has circular symmetry. It is also shown that the longitudinal energy flows are equal for optical vortices with unit topological charge and with radial or azimuthal polarization. The focal spot has a minimum diameter (all other characteristics being equal), which is measured based on the intensity of an optical vortex with azimuthal polarization. The diameter of the focal spot calculated from the energy flow for light with circular or linear polarization is slightly larger (by a fraction of a percentage). The magnitude of the diameter based on the intensity plays a role in the interaction of light with matter, and the magnitude of the diameter based on the energy flux affects the resolution in optical microscopy which is crucial in sensorial applications.https://www.mdpi.com/1424-8220/21/16/5505tight focusingcylindrical vector beamradial polarizationoptical vortexRichards–Wolf formalismPoynting vector |
| spellingShingle | Victor V. Kotlyar Sergey S. Stafeev Vladislav D. Zaitsev Minimal Focal Spot Size Measured Based on Intensity and Power Flow Sensors tight focusing cylindrical vector beam radial polarization optical vortex Richards–Wolf formalism Poynting vector |
| title | Minimal Focal Spot Size Measured Based on Intensity and Power Flow |
| title_full | Minimal Focal Spot Size Measured Based on Intensity and Power Flow |
| title_fullStr | Minimal Focal Spot Size Measured Based on Intensity and Power Flow |
| title_full_unstemmed | Minimal Focal Spot Size Measured Based on Intensity and Power Flow |
| title_short | Minimal Focal Spot Size Measured Based on Intensity and Power Flow |
| title_sort | minimal focal spot size measured based on intensity and power flow |
| topic | tight focusing cylindrical vector beam radial polarization optical vortex Richards–Wolf formalism Poynting vector |
| url | https://www.mdpi.com/1424-8220/21/16/5505 |
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