Title :
A Tunable Terahertz Photonic Crystal Narrow-Band Filter
Author :
Shaopeng Li ; Hongjun Liu ; Qibing Sun ; Nan Huang
Author_Institution :
State Key Lab. of Transient Opt. & Photonics Technol., Xi´an Inst. of Opt. & Precision Mech., Xi´an, China
Abstract :
We theoretically propose and investigate a magnetically tunable narrow-band terahertz filter based on a triangular lattice silicon photonic crystal with a point and two line defects. The optical properties of the filter have been analyzed in detail. It is found that a single resonant peak with the central frequency of ~1 THz is existed in the transmission spectrum, which has a narrow full width at half maximum of <;2 GHz. Moreover, under the control of an external magnetic field, transmission frequency and width of passband are adjustable, which reveals that the 2-D silicon photonic crystal waveguide with point and line defects can serve as a continuously tunable bandpass filter at the terahertz waveband.
Keywords :
band-pass filters; elemental semiconductors; magneto-optical devices; microwave photonics; optical lattices; optical waveguide filters; photonic crystals; silicon; terahertz wave devices; terahertz wave spectra; 2D silicon photonic crystal waveguide; Si; full width at half maximum; line defects; magnetic field; magnetically tunable narrow-band terahertz filter; optical properties; passband width; point defects; terahertz waveband; transmission frequency; transmission spectrum; triangular lattice silicon photonic crystal; tunable bandpass filter; tunable terahertz photonic crystal narrow-band filter; Band-pass filters; Magnetic separation; Materials; Microwave filters; Optical filters; Photonic crystals; Refractive index; Terahertz; narrow-band filter; photonic crystal; terahertz;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2391127
