Observation of enhanced terahertz emission in two-dimensional metal line arrays on GaAs surfaces
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2020-06-11 |
| Journal | Japanese Journal of Applied Physics |
| Authors | Hannah Bardolaza, Maria Angela Faustino-Lopez, Miguel Bacaoco, John Paul Ferrolino, Ivan Cedrick Verona |
| Institutions | University of the Philippines Diliman |
| Citations | 3 |
Abstract
Section titled âAbstractâEnhanced terahertz (THz) emission was observed from semi-insulating GaAs with square and diamond two-dimensional metal line arrays (2DMLAâs) of subwavelength periodicity. An externally-applied magnetic field was used to generate elliptically-polarized THz radiation from the samples and the THz emission characteristics were measured using a THz time-domain spectroscopy setup in transmission geometry. Finite difference time-domain simulations verified the enhancement as due to confinement of the THz electric field at the 2DMLA apertures. These results demonstrating spoof plasmonic enhancement effects may be useful for future photoconductive antenna emitter designs incorporating 2D micro-scale integrated optics, THz metamaterials, without the need for expensive electron beam nanolithography.