Asish P. Venkitesh, Abinash Barthakur, Przemyslaw Kula and Surajit Dhara*,
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引用次数: 0
Abstract
Nematic liquid crystals whose dielectric anisotropy changes sign above the crossover frequency are known as dual-frequency nematic liquid crystals (DFNLCs). Here, we report experimental studies on the whispering gallery mode (WGM) optical resonance in fluorescent dye-doped DFNLC microdroplets. The microdroplets are dispersed in a phospholipid-doped glycerol, forming a radial director structure. We investigate the effect of the amplitude and frequency of the applied electric field on the morphology and WGM resonance. We show that the WGM resonance can be tuned by changing the amplitude of the applied field at a fixed frequency and by varying the frequency at a fixed amplitude. Our experiments demonstrate that dual-frequency nematic liquid crystals provide new opportunities for tuning WGM resonance with frequency where the ability to tune by the amplitude of the electric field is limited.
期刊介绍：
ACS Applied Optical Materials is an international and interdisciplinary forum to publish original experimental and theoretical including simulation and modeling research in optical materials complementing the ACS Applied Materials portfolio. With a focus on innovative applications ACS Applied Optical Materials also complements and expands the scope of existing ACS publications that focus on fundamental aspects of the interaction between light and matter in materials science including ACS Photonics Macromolecules Journal of Physical Chemistry C ACS Nano and Nano Letters.The scope of ACS Applied Optical Materials includes high quality research of an applied nature that integrates knowledge in materials science chemistry physics optical science and engineering.
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