Study of visible light modulation based on magneto-optical thin films and dynamically tunable all dielectric metasurface embedded in nematic liquid crystal
The study of visible light modulators development has been intensively focused for advanced applications. Magneto-optical SLM (MO-SLM) and active all dielectric metasurface show outstanding performance in efficient visible light modulation. Large perpendicular magnetization anisotropy (PMA) of 480...
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
2019
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| Online Access: | https://hdl.handle.net/10356/85365 http://hdl.handle.net/10220/49228 |
| _version_ | 1826127754563682304 |
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| author | Sun, Ming-Yu |
| author2 | Zheng Yuanjin |
| author_facet | Zheng Yuanjin Sun, Ming-Yu |
| author_sort | Sun, Ming-Yu |
| collection | NTU |
| description | The study of visible light modulators development has been intensively focused for advanced applications. Magneto-optical SLM (MO-SLM) and active all dielectric metasurface show outstanding performance in efficient visible light modulation.
Large perpendicular magnetization anisotropy (PMA) of 480 emu/cm3 and a 0.5o polarization rotation magneto-optical Kerr effect (MOKE) was obtained in 60 nm thin MnBi layer. Oxidation effect was presented by magnetic measurements between a 14-day interval exposure in ambient environment. A dramatic enhancement of Kerr signal can be expected by introducing a layer of dielectric TiO2 layer (0.86o to 9.5o at 633 nm) based on the numerical simulation.
In the meantime, wide range shift in spectra (close to 20 nm around the resonance ~ 670 nm) and the 1.5 PI phase shift is obtained in the sample with a 1.5 um thin layer LC and drivable under a small voltage below 8 V. TiO2 metasurface of nano cylinders was fabricated by a series of standard process of e-beam lithography. Strong surface anchoring effect is observed with a large in-plane LC alignment deviation above PHI = 30o with respect to the preset LC photoalignment or rubbing alignment. |
| first_indexed | 2024-10-01T07:13:42Z |
| format | Thesis |
| id | ntu-10356/85365 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:13:42Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/853652023-07-04T16:28:16Z Study of visible light modulation based on magneto-optical thin films and dynamically tunable all dielectric metasurface embedded in nematic liquid crystal Sun, Ming-Yu Zheng Yuanjin School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering The study of visible light modulators development has been intensively focused for advanced applications. Magneto-optical SLM (MO-SLM) and active all dielectric metasurface show outstanding performance in efficient visible light modulation. Large perpendicular magnetization anisotropy (PMA) of 480 emu/cm3 and a 0.5o polarization rotation magneto-optical Kerr effect (MOKE) was obtained in 60 nm thin MnBi layer. Oxidation effect was presented by magnetic measurements between a 14-day interval exposure in ambient environment. A dramatic enhancement of Kerr signal can be expected by introducing a layer of dielectric TiO2 layer (0.86o to 9.5o at 633 nm) based on the numerical simulation. In the meantime, wide range shift in spectra (close to 20 nm around the resonance ~ 670 nm) and the 1.5 PI phase shift is obtained in the sample with a 1.5 um thin layer LC and drivable under a small voltage below 8 V. TiO2 metasurface of nano cylinders was fabricated by a series of standard process of e-beam lithography. Strong surface anchoring effect is observed with a large in-plane LC alignment deviation above PHI = 30o with respect to the preset LC photoalignment or rubbing alignment. Doctor of Philosophy 2019-07-10T01:36:38Z 2019-12-06T16:02:32Z 2019-07-10T01:36:38Z 2019-12-06T16:02:32Z 2019 Thesis Sun, M.-Y. (2019). Study of visible light modulation based on magneto-optical thin films and dynamically tunable all dielectric metasurface embedded in nematic liquid crystal. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/85365 http://hdl.handle.net/10220/49228 10.32657/10220/49228 en 181 p. application/pdf |
| spellingShingle | Engineering::Electrical and electronic engineering Sun, Ming-Yu Study of visible light modulation based on magneto-optical thin films and dynamically tunable all dielectric metasurface embedded in nematic liquid crystal |
| title | Study of visible light modulation based on magneto-optical thin films and dynamically tunable all dielectric metasurface embedded in nematic liquid crystal |
| title_full | Study of visible light modulation based on magneto-optical thin films and dynamically tunable all dielectric metasurface embedded in nematic liquid crystal |
| title_fullStr | Study of visible light modulation based on magneto-optical thin films and dynamically tunable all dielectric metasurface embedded in nematic liquid crystal |
| title_full_unstemmed | Study of visible light modulation based on magneto-optical thin films and dynamically tunable all dielectric metasurface embedded in nematic liquid crystal |
| title_short | Study of visible light modulation based on magneto-optical thin films and dynamically tunable all dielectric metasurface embedded in nematic liquid crystal |
| title_sort | study of visible light modulation based on magneto optical thin films and dynamically tunable all dielectric metasurface embedded in nematic liquid crystal |
| topic | Engineering::Electrical and electronic engineering |
| url | https://hdl.handle.net/10356/85365 http://hdl.handle.net/10220/49228 |
| work_keys_str_mv | AT sunmingyu studyofvisiblelightmodulationbasedonmagnetoopticalthinfilmsanddynamicallytunablealldielectricmetasurfaceembeddedinnematicliquidcrystal |