Preprint
Lithography-free IR polarization converters via orthogonal in-plane phonons in a-MoO3 flakes
ArXiv.org
06/18/2020
DOI: 10.48550/arxiv.2006.10855
Abstract
Exploiting polaritons in natural vdW materials has been successful in achieving extreme light confinement and low-loss optical devices and enabling simplified device integration. Recently, a-MoO3 has been reported as a semiconducting biaxial vdW material capable of sustaining naturally orthogonal in-plane phonon polariton modes in IR. In this study, we investigate the polarization-dependent optical characteristics of cavities formed using a-MoO3 to extend the degrees of freedom in the design of IR photonic components exploiting the in-plane anisotropy of this material. Polarization-dependent absorption over 80% in a multilayer Fabry-Perot structure with a-MoO3 is reported without the need for nanoscale fabrication on the a-MoO3. We observe coupling between the a-MoO3 optical phonons and the Fabry-Perot cavity resonances. Using cross-polarized reflectance spectroscopy we show that the strong birefringence results in 15% of the total power converted into the orthogonal polarization with respect to incident wave. These findings can open new avenues in the quest for polarization filters and low-loss, integrated planar IR photonics and in dictating polarization control.
Details
- Title: Subtitle
- Lithography-free IR polarization converters via orthogonal in-plane phonons in a-MoO3 flakes
- Creators
- Sina Abedini DereshgiThomas G FollandAkshay A MurthyXianglian SongIbrahim TanrioverVinayak P DravidJoshua D CaldwellKoray Aydin
- Resource Type
- Preprint
- Publication Details
- ArXiv.org
- DOI
- 10.48550/arxiv.2006.10855
- ISSN
- 2331-8422
- Language
- English
- Date posted
- 06/18/2020
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984442010802771
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