Abstract
We propose and experimentally demonstrate a small-mode volume bowtie cavity design for all-optical switching applications using a waveguide-cavity structure that exploits asymmetric Fano resonance lineshapes. The bowtie cavity has a mode volume that is five times smaller than conventional (H0-type) photonic crystal point-defect cavities enabling higher nonlinearity and faster switching. Blue and red-detuned Fano resonant devices based on bowtie cavity designs have been fabricated and characterized. Measured linear transmission spectra have been compared to coupled-mode theory models to extract key parameters such as Q-factors. Furthermore, all-optical switching at 2.5 Gbps have been demonstrated in a wavelength-conversion experiment.
Original language | English |
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Journal | Nanophotonics |
ISSN | 2192-8606 |
DOIs | |
Publication status | Accepted/In press - 2025 |
Keywords
- Extreme light confinement
- Fano resonance
- Nanocavity
- Nanophotonics
- Optical switching