Frequency-tunable terahertz radiation from stimulated polariton scattering in MgO:LiNbO3

Authors

  • Ameera Jose ⋅ AU MQ Photonics Research Centre, Macquarie University
  • Ondrej Kitzler ⋅ AU MQ Photonics Research Centre, Macquarie University
  • Helen Pask ⋅ AU MQ Photonics Research Centre, Macquarie University
  • David Spence ⋅ AU MQ Photonics Research Centre, Macquarie University

Abstract

Stimulated polariton scattering from transverse optical modes in MgO:LiNbO3 bulk crystals results in generation of electromagnetic waves in the terahertz (THz) region. In this paper, temperature and phase-matching polarization characteristics of MgO:LiNbO3 are theoretically analyzed. The enhancement of THz gain coefficient at lower temperature is attributed to the decrease in mode linewidth which leads to monotonic reduction in absorption coefficient. The calculated gain of order of several cm-1 suggests that forward and backward THz waves can be generated using type II non-collinear phase-matching. The results presented in this work will guide new experiments to optimize THz sources based on MgO:LiNbO3.

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Article ID

SPP-2021-2F-03

Section

Condensed Matter Physics and Materials Science

Published

2021-10-04

How to Cite

[1]
A Jose, O Kitzler, H Pask, and D Spence, Frequency-tunable terahertz radiation from stimulated polariton scattering in MgO:LiNbO3, Proceedings of the Samahang Pisika ng Pilipinas 39, SPP-2021-2F-03 (2021). URL: https://proceedings.spp-online.org/article/view/SPP-2021-2F-03.