M. Cho

Terahertz pulse propagation in a plastic photonic crystal fiber

Guided-wave single-mode propagation of sub-ps terahertz (THz) pulses in a plastic photonic crystal fiber has been experimentally demonstrated for the first time to the best of our knowledge. The plastic photonic crystal fiber is fabricated from high density polyethylene tubes and filaments. The fabricated fiber exhibits low loss and relatively low dispersive propagation of THz pulses within the experimental bandwidth of 0.1 /spl sim/ 3 THz. The measured loss and group velocity dispersion are less than 0.5 cm/sup -1/ and -0.3 ps/THz/spl middot/cm above 0.6 THz, respectively.

Highly birefringent terahertz polarization maintaining plastic photonic crystal fibers

Guided-wave propagation of sub-ps terahertz (THz) pulses in a highly birefringent plastic photonic crystal fiber was studied by using a THz time domain spectroscopy technique. The plastic photonic crystal fiber was fabricated by using high density polyethylene tubes and solid filaments. The fabricated THz plastic photonic crystal fibers exhibit an extremely large birefringence of ~ 2.1 x 10(-2), which is almost one order of magnitude larger than that of previously reported photonic crystal fibers.

Terahertz pulse transmission in plastic photonic crystal fibres

Guided-wave single-mode propagation of sub-ps terahertz (THz) pulses in a plastic photonic crystal fibre has been experimentally demonstrated. The plastic photonic crystal fibre (PPCF) is fabricated from high-density polyethylene tubes and filaments. The fibre exhibits low loss and relatively low dispersive propagation of THz pulses within the experimental bandwidth of 0.1-3 THz. Such PPCFs have the promise of low loss, mechanically flexible interconnect channels for compact THz devices and systems.

Air-guiding photonic crystal waveguides for terahertz radiation

Air guided single mode propagation of THz radiation in a photonic crystal waveguide has been experimentally demonstrated. The photonic crystal waveguide has been fabricated by introducing an air defect at the center of the air/Si 1D photonic crystal.

Highly birefringent terahertz plastic photonic crystal fibers

Guided-wave propagation of sub-ps terahertz (THz) pulses in a highly birefringent plastic photonic crystal fiber (PPCF) was studied by using a THz time domain spectroscopy technique. The fabricated THz PPCFs exhibit an extremely large birefringence of ~ 2.1times10-2, which is almost one order of magnitude larger than that of previously reported PCFs.

FITD Simulation of Terahertz Near-Field Microscopes

The spatial resolutions of conventional THz TDS systems are limited by diffraction. In this work, we present a numerical analysis of apertureless THz pulse near-field microscopy (NFM), and successfully demonstrate that the THz NFM can have nanometer-scale resolution. For the numerical analysis we used CST MWS, a commercial software based on finite integral time domain (FITD) method. It is found that the THz near field is strongly localized around the probe tip as expected, which is of importance for nanometer resolution.

Highly birefringent terahertz photonic crystal fiber

Guided-wave propagation of sub-ps terahertz (THz) pulses in a highly birefringent plastic photonic crystal fiber has been experimentally demonstrated. The fabricated fibers have exhibited an extremely high birefringence of ~ 0.021 at 0.3 THz.