Design of curved photonic cavities for a narrow-band widely tunable resonance ranging 200 nm

Abstract

We propose a type of photonic resonator with a tunable curved cavity that enables efficient tuning of the optical length of a resonant cavity made of a solid material; we call this a "tunable curved resonator" (TCR). Its integration with a "tunable curved waveguide" (TCWG) and their actuation by a MEMS (micro electromechanical systems) electrostatic comb actuator are also designed for integrated photonic circuits. With this kind of structure, a widely and continuously tunable narrow-band resonance ranging up to 200 nm is achieved with a MEMS actuation voltage less than 70 V. Its applications in widely tunable photonic filters and lasers are promising.

Highly efficient beam combiner based on the super-collimation effect in photonic crystals with elliptical rods

“…The first one was using the special hyperbolic dispersion of PC structures; zero reflection was achieved, but it required quite strict surface termination [20]. For the second kind of technique, high-efficiency modes coupling was obtained by introducing resonant cavities or an additional structure (e.g., concave lens or tapered structure) before PC waveguides [21][22][23], which made the entire structure more complicated and unfavorable for fabrication. The last kind of technique was careful structure design [24,25].…”

Large-angle beam splitter with sensitive adjustable power ratio based on superprism effect

“…Based on these properties, many functional devices have been proposed and are expected to play important roles in future photonic circuits. Components used in planar optical circuits include couplers [9], de/multiplexers [10], cavities [11,12], and especially beam splitters (BSs) [13][14][15][16][17][18][19][20][21][22][23][24], and they can be realized in two-dimensional (2D) PC slab structures. The devices based on the 2D PC slab have many advantages, such as relatively easy fabrication and convenient integration into conventional devices.…”