Abstract
We report on the studies of the surface plasmon polaritons in n-GaN epitaxial layers. The grating etched on the surface of the epitaxial layer is used to excite surface plasmon polaritons by means of terahertz photons. The experimental reflectivity spectrum for p-polarized radiation demonstrates a set of resonances associated with excitation of different surface plasmon polariton modes. Spectral peculiarities due to the diffraction effect have been also revealed. Emission of terahertz radiation is investigated under epilayer temperature modulation by electric current. The emissivity spectrum of the epitaxial layer with surface-relief grating shows peaks in the frequency ranges corresponding to the decay of the surface plasmon polariton modes. The characteristic features of the reflectivity and emissivity spectra are well described theoretically by a differential method with explicit integration scheme.
| Original language | English |
|---|---|
| Article number | 012073 |
| Journal | Journal of Physics: Conference Series |
| Volume | 864 |
| DOIs | |
| Publication status | Published - 15 Aug 2017 |
| MoE publication type | A4 Article in a conference publication |
| Event | 33rd International Conference on the Physics of Semiconductors - Beijing, China Duration: 31 Jul 2016 → 5 Aug 2016 |
Funding
This work was supported by the RFBR (projects Nos. 14-02-90444 and 16-32-60085), the Ministry of Education and Science of the Russian Federation (state assignment), the National Academy of Sciences of Ukraine (project 25-02-14), and the Academy of Finland (project No. 13251864).