All-Optical Switching Improvement Using Photonic-Crystal Fano Structures

Low-loss ultrafast and nonvolatile all-optical switch enabled by all-dielectric phase change materials

“…This phenomenon called Fano resonance is because of the interactions of narrow Bragg resonances with broad Mie or Fabry–Pérot bands in photonic crystals ( Luk’yanchuk et al., 2010 ). Fano resonance can provide a quite steep and asymmetric transmission spectrum ( Hayashi et al., 2016 )( Yu et al., 2016 ), which is beneficial for some sensing devices. Similar to hybrid plasmonic metamaterials ( Wang et al., 2015 )( Nikolaenko et al., 2010 ), the size parameters and the refractive index (or dielectric constant) of PhCs surface can influence the resonance frequency ( Petronijevic and Sibilia, 2016 ).…”

On-Chip Architecture for Self-Homodyned Nonclassical Light

“…The interference between these two scattering channels then results in an asymmetric Fanoresonant lineshape [26] in transmission. This type of device has been explored classically [25,27,28] and semiclassically [29][30][31] for switching and lasing applications. However, in our paper we will explore this device from a fully cavity quantum electrodynamical (CQED) perspective [32] by studying the quantum statistics of the transmitted light [33].…”

Fano resonance from a one-dimensional topological photonic crystal

“…Constructive and destructive interferences between localized discrete state and continuum state usually give rise to asymmetric spectra, which is known as Fano resonance [1]. Asymmetric lineshape of Fano resonance exhibits an ultrasharp variation from the minimum to the maximum compared to the symmetric Lorenzian lineshape with an approximative quality (Q) factor [2]. This steeper resonant peak provides great advantages for chip-scale integrated applications like low-threshold lasing [3,4], high-sensitivity optical sensing [5][6][7] and low-power all-optical switching [2,[8][9][10].…”

“…Asymmetric lineshape of Fano resonance exhibits an ultrasharp variation from the minimum to the maximum compared to the symmetric Lorenzian lineshape with an approximative quality (Q) factor [2]. This steeper resonant peak provides great advantages for chip-scale integrated applications like low-threshold lasing [3,4], high-sensitivity optical sensing [5][6][7] and low-power all-optical switching [2,[8][9][10]. Thanks to the maturity and rapid development of planar processing technology, a large number of structures such as microring resonators [11][12][13][14][15], microdisks [16] and photonic crystal (PC) nano-cavities [2,4,[8][9][10] have been proposed to generate the Fano resonance.…”

“…This steeper resonant peak provides great advantages for chip-scale integrated applications like low-threshold lasing [3,4], high-sensitivity optical sensing [5][6][7] and low-power all-optical switching [2,[8][9][10]. Thanks to the maturity and rapid development of planar processing technology, a large number of structures such as microring resonators [11][12][13][14][15], microdisks [16] and photonic crystal (PC) nano-cavities [2,4,[8][9][10] have been proposed to generate the Fano resonance. Among them, more compact designs are always expected to meet the rapid development of large-scale photonic integrated circuits.…”