Abstract
Abstract Chiral photonic-band structure provides technical benefits in the form of a self-assembled helical structure and further functional wavelength tunability that exploits helical deformation according to pitch changes. The stopband wavelength control of the chiral photonic-band structure can be obtained by individual electrical methods or mechanical stretching deformation approaches. However, research on combined electric control of stretchable chiral photonic-band wavelength control while ensuring optical stability during the tuning process has remained limited till now. In this study, using the hybrid structure of elastomeric mesogenic chiral photonic gels (CPGs) with an electrically controlled dielectric soft actuator, we report the first observation of electrically stretchable CPGs and their electro-mechano-optical behaviors. The reliable wavelength tuning of a CPG to a broadband wavelength of ∼171 nm changed with high optical stability and repeated wavelength transitions of up to 100 times. Accordingly, for the first time, electrical wavelength tuning method of stretchable chiral liquid crystal photonicband structure was investigated.
Highlights
A chiral photonic-band structure using liquid crystals can spontaneously self-organize, enabling it to exploit the helicoidal optical rotation of mesogenic molecules, which have an effective birefringence [1]
In this study, using the hybrid structure of elastomeric mesogenic chiral photonic gels (CPGs) with an electrically controlled dielectric soft actuator, we report the first observation of electrically stretchable CPGs and their electro-mechano-optical behaviors
Using the intrinsic benefits of soft matter, where the molecular arrangements can be altered in a controllable manner, chiral photonic-band structures and a photonic stopband wavelength can be tuned by addressing various external stimuli such as light [15,16,17,18,19,20], temperature [21,22,23,24,25], electric field [26,27,28,29,30,31,32], and mechanical deformation [33,34,35,36]
Summary
A chiral photonic-band structure using liquid crystals can spontaneously self-organize, enabling it to exploit the helicoidal optical rotation of mesogenic molecules, which have an effective birefringence [1]. In this study, using the hybrid structure of elastomeric mesogenic chiral photonic gels (CPGs) with an electrically controlled dielectric soft actuator, we report the first observation of electrically stretchable CPGs and their electro-mechano-optical behaviors.
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