Photonic crystal channel drop filter based on ring-shaped defects for DWDM systems

Coupled cavity-waveguide based on topological corner state and edge state

“…With its unique band gap and local characteristics, photonic crystal (PC) has become an effective carrier for realizing on-chip integrated optical communication [1,2]. Coupled cavity-waveguide system (CCWS) based on PCs can realize the input, localization and output of optical signals, and has been widely used in filters [3,4], sensors [5,6], lasers [7,8] and other micro-nano integrated photonics devices. However, the performance of conventional optical waveguide and optical cavity is easily affected by obstacles and defects caused by actual fabrication errors.…”

Investigation of Electromagnetic Wave Propagation Frequencies in Two-Dimensional Photonic Crystals with Finite Differences Method

“…In these studies, the finite difference method is preferred for the solution since the structures whose electromagnetic wave propagation behavior is examined are two-dimensional and each point of the structures has different material properties. Moreover, the frequencies of electromagnetic wave propagation in optical structures are examined using the finite difference method by drilling small circular holes or additions to the structures (Alipour-Banaei et al, 2017;Dideban et al, 2017;Xia et al, 2017).…”

All optical binary ASK demodulator using photonic crystal based nonlinear ring resonator

“…In last decades it has been shown that photonic crystals (PhCs) [1,2] which consist of regular arrangement of dielectric materials with periodic refractive indices can be very useful for designing different kinds of optical devices [3][4][5]. The realization of optical filters [6][7][8][9][10], demultiplexers [11][12][13][14][15][16], logic gates [17][18][19][20][21][22], coders [23][24][25][26][27][28][29], adders [30][31][32][33][34][35] and analog to digital converters [36][37][38][39][40] proves the ability of photonic crystals for playing a crucial role in the next generation of all optical networks. An all optical phase shift keying (PSK) demodulator was designed using 2D PhCs [41].…”