Cholesteric ring resonators

Juergen Schmidtke

doi:10.1117/12.2632230

3 October 2022 Cholesteric ring resonators

Juergen Schmidtke

Proceedings Volume 12207, Liquid Crystals XXVI; 1220704 (2022) https://doi.org/10.1117/12.2632230
Event: SPIE Organic Photonics + Electronics, 2022, San Diego, California, United States

Abstract

Cholesteric liquid crystals (CLCs) show a polarization-sensitive photonic band gap (selective reflection band), the band edges exhibiting resonant optical modes for circularly polarized light. In a theoretical treatment, we discuss the optics of cholesteric ring resonators, where the light is confined to a closed path along the cholesteric helix, which is bent into a circle. Apart from the well-known cavity and band-edge resonances, introduction of an artificial defect (defect layer and/or discontinuity of the director orientation) gives rise to additional resonant modes inside the photonic band gap (defect modes). Such systems show a unique combination of ring cavity, band edge, and defect mode resonances.

Conference Presentation

Citation Download Citation

Juergen Schmidtke "Cholesteric ring resonators", Proc. SPIE 12207, Liquid Crystals XXVI, 1220704 (3 October 2022); https://doi.org/10.1117/12.2632230

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