Heavy noble gas (Kr, Xe) irradiated (111) InP nanoporous honeycomb membranes with enhanced ultrafast all-optical terahertz emission

Abstract

Nanoporous honeycomb membranes on InP (111) surfaces emit ultrafast coherent terahertz pulses under near-infrared optical excitation. Irradiating the membranes with heavy noble gas Kr or Xe ions enhances the terahertz emission. The emission does not vary with in-plane magnetic field rotation and exhibits three-cycle dependence on azimuthal-angle rotation. Both suggest the terahertz source is not transient currents but optical rectification enhanced by the heavy-ion irradiation.

Geometrical factors in the emission of terahertz radiation from semiconductors under excitation by sub-picosecond pump pulses

“…In the case of heavy noble gas (Kr, Xe) irradiated (111) InP nanoporous honeycomb membranes, it is found that the terahertz emission is not influenced by an in-plane magnetic field, nor does it show saturation with pump fluence [20]. However, it exhibits a three-cycle dependence on azimuthalangle rotation.…”

Porous and RF sputtering InP for portable THz-TDS in pharmaceutical and medical applications

“…We developed the photoconductive antenna based on structured InP material and have demonstrated that irradiating nanoporous membranes of (111) InP with heavy noble-gas ions enhances terahertz emission. [2] We developed a technology for deposition contacts/wires upon nanoporous InP thin film structures, see the figures 2, 3. In this way we demonstrate the possibility of fabrication an array of antennas/detectors.…”

Terahertz Emitters, Detectors and Sensors: Current Status and Future Prospects

“…This could be eliminated by placing nonlinear crystal in hollow metallic waveguide structure . The conversion efficiency in optical rectification depends primarily on the material nonlinear coefficient and the phase-matching conditions and various schemes for power enhancement have been reported [Radhanpura et al, 2010;Bugay & Sazonov, 2010;He et al, 2008;Reid et al, 2008].…”