Features of a Gaussian beam near-field diffraction upon variations in the relief height of subwavelength silicon optical elements
Features of the near-field diffraction of Gaussian beams and Laguerre-Gauss modes by silicon subwavelength optical elements with varying relief height were studied in this paper using a finite-difference time-domain method. Diffractive axicons and subwavelength ring gratings were considered as the o...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Samara National Research University
2023-12-01
|
| Series: | Компьютерная оптика |
| Subjects: | |
| Online Access: | https://www.computeroptics.ru/eng/KO/Annot/KO47-6/470611e.html |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832580621643284480 |
|---|---|
| author | D.A. Savelyev |
| author_facet | D.A. Savelyev |
| author_sort | D.A. Savelyev |
| collection | DOAJ |
| description | Features of the near-field diffraction of Gaussian beams and Laguerre-Gauss modes by silicon subwavelength optical elements with varying relief height were studied in this paper using a finite-difference time-domain method. Diffractive axicons and subwavelength ring gratings were considered as the optical elements with varying relief height. It was shown that the height of individual rings of the ring grating relief can be selected in such a way that the focal spot size is reduced to 0.26λ, an extended intensity line of length up to 4.88λ is generated and optical traps are formed. |
| format | Article |
| id | doaj-art-69a887278b81459fad0bfa2f649ccc32 |
| institution | Kabale University |
| issn | 0134-2452 2412-6179 |
| language | English |
| publishDate | 2023-12-01 |
| publisher | Samara National Research University |
| record_format | Article |
| series | Компьютерная оптика |
| spelling | doaj-art-69a887278b81459fad0bfa2f649ccc322025-01-30T10:47:53ZengSamara National Research UniversityКомпьютерная оптика0134-24522412-61792023-12-0147693894710.18287/2412-6179-CO-1402Features of a Gaussian beam near-field diffraction upon variations in the relief height of subwavelength silicon optical elementsD.A. Savelyev0IPSI RAS – Branch of the FSRC "Crystallography and Photonics" RAS; Samara National Research UniversityFeatures of the near-field diffraction of Gaussian beams and Laguerre-Gauss modes by silicon subwavelength optical elements with varying relief height were studied in this paper using a finite-difference time-domain method. Diffractive axicons and subwavelength ring gratings were considered as the optical elements with varying relief height. It was shown that the height of individual rings of the ring grating relief can be selected in such a way that the focal spot size is reduced to 0.26λ, an extended intensity line of length up to 4.88λ is generated and optical traps are formed.https://www.computeroptics.ru/eng/KO/Annot/KO47-6/470611e.htmlgaussian beamsoptical vorticessilicon ring gratingsdiffractive axiconsharp focusingoptical trapfdtd |
| spellingShingle | D.A. Savelyev Features of a Gaussian beam near-field diffraction upon variations in the relief height of subwavelength silicon optical elements Компьютерная оптика gaussian beams optical vortices silicon ring gratings diffractive axicon sharp focusing optical trap fdtd |
| title | Features of a Gaussian beam near-field diffraction upon variations in the relief height of subwavelength silicon optical elements |
| title_full | Features of a Gaussian beam near-field diffraction upon variations in the relief height of subwavelength silicon optical elements |
| title_fullStr | Features of a Gaussian beam near-field diffraction upon variations in the relief height of subwavelength silicon optical elements |
| title_full_unstemmed | Features of a Gaussian beam near-field diffraction upon variations in the relief height of subwavelength silicon optical elements |
| title_short | Features of a Gaussian beam near-field diffraction upon variations in the relief height of subwavelength silicon optical elements |
| title_sort | features of a gaussian beam near field diffraction upon variations in the relief height of subwavelength silicon optical elements |
| topic | gaussian beams optical vortices silicon ring gratings diffractive axicon sharp focusing optical trap fdtd |
| url | https://www.computeroptics.ru/eng/KO/Annot/KO47-6/470611e.html |
| work_keys_str_mv | AT dasavelyev featuresofagaussianbeamnearfielddiffractionuponvariationsinthereliefheightofsubwavelengthsiliconopticalelements |