Terahertz two-dimensional high-Q photonic crystal waveguide cavities

Abstract

Numerical simulations were used to design a variety of high-Q resonant cavities for integration into a terahertz 2D photonic crystal waveguide. After fabrication, the transmission characteristics of each integrated cavity were explored. These photonic waveguide-coupled cavities demonstrate resonances with linewidths approaching 10 GHz. The results compare favorably to previous observations of rectangular waveguide cavities. Good agreement between the experimental results and the numerical simulations was obtained.

Terahertz spectroscopy and imaging – Modern techniques and applications

“…The development of the parallel-plate waveguide for THz frequencies has overcome some of the problems associated with the recording of absorption spectra with high spectral resolution. The development of the PPWG as a useful spectroscopic tool for the THz region was pioneered by Grischkowsky et al [39,[243][244][245][246][247] and Mittleman et al [149,248,250] In the following we will discuss the relevance of the PPWG for sensitive spectroscopy with high spectral resolution.…”

Dynamic optically induced planar terahertz quasioptics

“…11 Reflective, 11 refractive, and diffractive quasioptical elements 12 have been demonstrated as well as 2D photonic crystal lattices, 13,14 waveguides, 9 and resonators. 15 These passive components form the basic structure of a THz photonic circuit, all on a chip. A key missing feature, however, is the ability to actively control the direction of pulse propagation in the plane.…”

Metallic photonic crystals for terahertz tunable filters

“…For the construction of compact application systems, THz functional devices such as THz switches [5], filters [6], splitters [7] and phase retarders [8] are indispensable. Among these devices, photonic crystals (PCs) have proved to be an effective way to transmit and control THz waves [9][10][11]. PCs for high quality switching and filtering have been widely studied due to their potential applications [12][13][14].…”

“…Grischkowsky et al [10,11] have shown that the metallic PCs can be used as low-loss THz filters via the experimental studies on the transmission properties of the metallic PCs. Unlike the optical band, common metals have almost no absorption, nor dispersion nor extremely large complex dielectric constant for the THz band [16].…”