Liquid Crystal Auto-Induction and Amplification Function for Circularly Polarized Luminescence (CPL) with High g_em-Value, and Dynamically Controllable CPL Devices

Abstract

Optically active phenylenevinylene derivatives with fluorescence are employed for preparation of a cholesteric liquid crystal based circularly polarized light (CPL) emission device. The device shows intense CPL with a quite large value of the g_em-factor (= 0.6) and quick CPL light switching driven by cholesteric-nematic transition with a homeotropic alignment. This research develops the auto-induction of fluorescent chiral inducers in host liquid crystal for formation of a helical structure with CPL amplification. The present research applies a classical LC light-scattering system using chiral technology as a new method for obtaining CPL dynamic control with an intense g_em-factor.

Keywords:

• Auto-chiral induction
• CPL amplification
• dynamic switching of CPL
• intense g_em
• 3D helical collective

Acknowledgment

This research was firstly supported by JSPS KAKENHI Grant Number 16550106 (2004-2005). Presently supported by JSPS KAKENHI Grant Number 17K05985 (2017-2019).