Photonic density of states and photonic bandgap of deformed titanium dioxide inverse opal structure
Titanium dioxide (TiO2) inverse opal, a well-ordered nanoporous media, has a good potential in light-matter enhancement application. In this work, the fabricated TiO2 inverse opal structures were prepared by well-ordered template from convective deposition. This measured photonic bandgap was shorter...
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th-mahidol.742122022-08-04T11:12:02Z Photonic density of states and photonic bandgap of deformed titanium dioxide inverse opal structure Nonthanan Sitpathom Tanyakorn Muangnapoh Pisist Kumnorkaew Sujin Suwanna Asawin Sinsarp Tanakorn Osotchan Thailand National Nanotechnology Center Mahidol University King Mongkut's University of Technology Thonburi Materials Science Titanium dioxide (TiO2) inverse opal, a well-ordered nanoporous media, has a good potential in light-matter enhancement application. In this work, the fabricated TiO2 inverse opal structures were prepared by well-ordered template from convective deposition. This measured photonic bandgap was shorter in wavelength from the theoretical prediction of the perfect well-ordered pore structure due to structural shrinkage and incomplete matrix fill. Shorter lattice distance from shrinkage and lower refractive index of matrix from incomplete-filled structure resulted in higher eigen energies of photonic crystal. The scanning electron microscope images indicated that the pore size of TiO2 inverse opal was reduced around 39% from the initial template size. Additionally, to explore the detail on photonic bandgap shift of deformed inverse opal, the photonic band-structures and density of states (DOS) spectra under variation of refractive index and fill fraction were evaluated by plane-wave expansion method. It was found that the zero DOS range has a narrow bandwidth at low fill fraction and refractive index of the matrix which agreed with the perturbation theory on the Hermitian Maxwell eigenvalue problem. 2022-08-04T04:12:02Z 2022-08-04T04:12:02Z 2022-01-01 Article Materials Today: Proceedings. (2022) 10.1016/j.matpr.2022.06.399 22147853 2-s2.0-85133532270 https://repository.li.mahidol.ac.th/handle/123456789/74212 Mahidol University SCOPUS https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85133532270&origin=inward |
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Materials Science Nonthanan Sitpathom Tanyakorn Muangnapoh Pisist Kumnorkaew Sujin Suwanna Asawin Sinsarp Tanakorn Osotchan Photonic density of states and photonic bandgap of deformed titanium dioxide inverse opal structure |
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Titanium dioxide (TiO2) inverse opal, a well-ordered nanoporous media, has a good potential in light-matter enhancement application. In this work, the fabricated TiO2 inverse opal structures were prepared by well-ordered template from convective deposition. This measured photonic bandgap was shorter in wavelength from the theoretical prediction of the perfect well-ordered pore structure due to structural shrinkage and incomplete matrix fill. Shorter lattice distance from shrinkage and lower refractive index of matrix from incomplete-filled structure resulted in higher eigen energies of photonic crystal. The scanning electron microscope images indicated that the pore size of TiO2 inverse opal was reduced around 39% from the initial template size. Additionally, to explore the detail on photonic bandgap shift of deformed inverse opal, the photonic band-structures and density of states (DOS) spectra under variation of refractive index and fill fraction were evaluated by plane-wave expansion method. It was found that the zero DOS range has a narrow bandwidth at low fill fraction and refractive index of the matrix which agreed with the perturbation theory on the Hermitian Maxwell eigenvalue problem. |
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Thailand National Nanotechnology Center |
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Thailand National Nanotechnology Center Nonthanan Sitpathom Tanyakorn Muangnapoh Pisist Kumnorkaew Sujin Suwanna Asawin Sinsarp Tanakorn Osotchan |
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Nonthanan Sitpathom Tanyakorn Muangnapoh Pisist Kumnorkaew Sujin Suwanna Asawin Sinsarp Tanakorn Osotchan |
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Nonthanan Sitpathom |
title |
Photonic density of states and photonic bandgap of deformed titanium dioxide inverse opal structure |
title_short |
Photonic density of states and photonic bandgap of deformed titanium dioxide inverse opal structure |
title_full |
Photonic density of states and photonic bandgap of deformed titanium dioxide inverse opal structure |
title_fullStr |
Photonic density of states and photonic bandgap of deformed titanium dioxide inverse opal structure |
title_full_unstemmed |
Photonic density of states and photonic bandgap of deformed titanium dioxide inverse opal structure |
title_sort |
photonic density of states and photonic bandgap of deformed titanium dioxide inverse opal structure |
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2022 |
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https://repository.li.mahidol.ac.th/handle/123456789/74212 |
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1763496620668747776 |