High-Q two-dimensional photonic crystal nanocavity on glass with an upper glass thin film
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2023
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866913731464658944 |
|---|---|
| author | Kawata, Ryusei Fujita, Akinari Pholsen, Natthajuks Iwamoto, Satoshi Ota, Yasutomo |
| author_facet | Kawata, Ryusei Fujita, Akinari Pholsen, Natthajuks Iwamoto, Satoshi Ota, Yasutomo |
| contents | We numerically analyze two-dimensional photonic crystal (PhC) nanocavities on glass with a thin glass film on top of the structure. We investigated a multi-step heterostructure GaAs PhC nanocavity located on glass. We found that covering the structure even with a very-thin glass film efficiently suppresses unwanted polarization mode conversion occurring due to the asymmetric refractive index environment around the PhC. We also uncovered that the glass-covered structure can exhibit a higher Q factor than that observed in the structure symmetrically cladded with thick glass. We point out that the mode mismatch between the PhC nanocavity and modes in the upper glass film largely contributed to the observed Q-factor enhancement. These observations were further analyzed through the comparison among different types of on-glass PhC nanocavites covered with thin glass films. We also discuss that the in-plane structure of the upper glass film is important for additionally enhancing Q factor of the nanocavity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_00935 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | High-Q two-dimensional photonic crystal nanocavity on glass with an upper glass thin film Kawata, Ryusei Fujita, Akinari Pholsen, Natthajuks Iwamoto, Satoshi Ota, Yasutomo Optics We numerically analyze two-dimensional photonic crystal (PhC) nanocavities on glass with a thin glass film on top of the structure. We investigated a multi-step heterostructure GaAs PhC nanocavity located on glass. We found that covering the structure even with a very-thin glass film efficiently suppresses unwanted polarization mode conversion occurring due to the asymmetric refractive index environment around the PhC. We also uncovered that the glass-covered structure can exhibit a higher Q factor than that observed in the structure symmetrically cladded with thick glass. We point out that the mode mismatch between the PhC nanocavity and modes in the upper glass film largely contributed to the observed Q-factor enhancement. These observations were further analyzed through the comparison among different types of on-glass PhC nanocavites covered with thin glass films. We also discuss that the in-plane structure of the upper glass film is important for additionally enhancing Q factor of the nanocavity. |
| title | High-Q two-dimensional photonic crystal nanocavity on glass with an upper glass thin film |
| topic | Optics |
| url | https://arxiv.org/abs/2311.00935 |