Abstract
We theoretically investigate the design of thin subwavelength gratings possessing high-reflectivity and high-Q resonances when illuminated at normal incidence by a Gaussian beam. We compare the performances of single-period and dual-period rectangular gratings using finite element method-based optimization and predict a close to two orders of magnitude improvement (×90) in their transmission loss-linewidth product, which is the relevant figure of merit for e.g. resonant mirror-based microcavity applications.
| Original language | English |
|---|---|
| Article number | 045009 |
| Journal | Journal of Physics: Photonics |
| Volume | 6 |
| Issue | 4 |
| DOIs | |
| Publication status | Published - Oct 2024 |
Keywords
- guided-mode resonance
- photonic crystal
- subwalength grating
- ultrathin mirrors