Loading...

Frequency conversion in time-varying graphene microribbon arrays

Salehi, M ; Sharif University of Technology | 2022

82 Viewed
  1. Type of Document: Article
  2. DOI: 10.1364/OE.467479
  3. Publisher: Optica Publishing Group (formerly OSA) , 2022
  4. Abstract:
  5. We investigate the possibility of frequency conversion in time-varying metasurfaces, composed of graphene microribbon arrays (GMRAs) with time-periodic modulation of their conductivity. We present a quasi-static model for the interaction of light with a temporally modulated metasurface, as well as an accurate analytical treatment of the problem of time-varying GMRAs. Results coming from numerical simulations are also available. We provide corrections to a previous related proposal for frequency conversion and refute the possibility of attaining frequency shifts not equal to an integral multiple of modulation frequency. Contrary to the preceding results, our findings show that efficient frequency conversion demands more requisites than single-layer GMRAs can supply and that its requirements can be addressed successfully by a multi-layer design. © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
  6. Keywords:
  7. Modulation ; Analytical treatment ; Frequency conversions ; Frequency shift ; Integral multiples ; Metasurface ; Modulation frequencies ; Quasi static models ; Single layer ; Time varying ; Time-periodic modulation ; Graphene
  8. Source: Optics Express ; Volume 30, Issue 18 , 2022 , Pages 32061-32073 ; 10944087 (ISSN)
  9. URL: https://opg-optica-org.access.semantak.com/oe/fulltext.cfm?uri=oe-30-18-32061&id=492818