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Isotropic wavevector domain image filters by a photonic crystal slab device
- 发表刊物：JOSA A
- 摘要：We show that several types of isotropic image filters in the wavevector domain can be implemented with a single photonic crystal slab device. Such a slab is designed so that the guided resonance near the Γ point exhibits an isotropic band structure. Depending on the light frequency and the choice of transmission or reflection mode, the device realizes isotropic high-pass, low-pass, band-reject, and band-pass filtering in wavevector space. These filter functions are important for various image processing tasks, including edge detection, smoothing, white noise suppression, and suppression or …
- 卷号：35
- 期号：10
- 页面范围：1685-1691
- 是否译文：否
- 发表时间：2018-10-01
