Fem simulation to understand parameters controlling photonic nanojet spot size
The diffraction limit in optical microscopy was identified 150 years ago, especially in the far field due to the loss of evanescent signals that contains the high spatial data of the specimen. In recent years, much research on integration of microspheres in optical microscopy have been widely stu...
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| Format: | Final Year Project (FYP) |
| Language: | English |
| Published: |
2016
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| Online Access: | http://hdl.handle.net/10356/68469 |
| _version_ | 1826123422805000192 |
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| author | Krisnan, Moganasundari |
| author2 | Manojit Pramanik |
| author_facet | Manojit Pramanik Krisnan, Moganasundari |
| author_sort | Krisnan, Moganasundari |
| collection | NTU |
| description | The diffraction limit in optical microscopy was identified 150 years ago, especially in the far
field due to the loss of evanescent signals that contains the high spatial data of the specimen. In
recent years, much research on integration of microspheres in optical microscopy have been
widely studied to tackle this barrier.
In this paper, a 2D FEM simulation study was performed to identify the parameters that assist in
achieving a sub-wavelength photonic nanojet using different designs of microsphere geometries.
The Full width at half Maximum (FWHM) latitudinal and longitudinal dimensions of the
photonic nanojet was numerically calculated and are presented in detail.
From the simulations, photonic nanojets with a width as small as 248nm, and elongated photonic
nanojets of about 27391nm (25λ) can be achieved. This simple approach can be used in
biomedical microscopy which desires fine resolution of nanoscale specimens. |
| first_indexed | 2024-10-01T06:04:25Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/68469 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:04:25Z |
| publishDate | 2016 |
| record_format | dspace |
| spelling | ntu-10356/684692023-03-03T15:37:14Z Fem simulation to understand parameters controlling photonic nanojet spot size Krisnan, Moganasundari Manojit Pramanik School of Chemical and Biomedical Engineering DRNTU::Engineering The diffraction limit in optical microscopy was identified 150 years ago, especially in the far field due to the loss of evanescent signals that contains the high spatial data of the specimen. In recent years, much research on integration of microspheres in optical microscopy have been widely studied to tackle this barrier. In this paper, a 2D FEM simulation study was performed to identify the parameters that assist in achieving a sub-wavelength photonic nanojet using different designs of microsphere geometries. The Full width at half Maximum (FWHM) latitudinal and longitudinal dimensions of the photonic nanojet was numerically calculated and are presented in detail. From the simulations, photonic nanojets with a width as small as 248nm, and elongated photonic nanojets of about 27391nm (25λ) can be achieved. This simple approach can be used in biomedical microscopy which desires fine resolution of nanoscale specimens. Bachelor of Engineering (Chemical and Biomolecular Engineering) 2016-05-26T04:05:06Z 2016-05-26T04:05:06Z 2016 Final Year Project (FYP) http://hdl.handle.net/10356/68469 en Nanyang Technological University 57 p. application/pdf |
| spellingShingle | DRNTU::Engineering Krisnan, Moganasundari Fem simulation to understand parameters controlling photonic nanojet spot size |
| title | Fem simulation to understand parameters controlling photonic nanojet spot size |
| title_full | Fem simulation to understand parameters controlling photonic nanojet spot size |
| title_fullStr | Fem simulation to understand parameters controlling photonic nanojet spot size |
| title_full_unstemmed | Fem simulation to understand parameters controlling photonic nanojet spot size |
| title_short | Fem simulation to understand parameters controlling photonic nanojet spot size |
| title_sort | fem simulation to understand parameters controlling photonic nanojet spot size |
| topic | DRNTU::Engineering |
| url | http://hdl.handle.net/10356/68469 |
| work_keys_str_mv | AT krisnanmoganasundari femsimulationtounderstandparameterscontrollingphotonicnanojetspotsize |