Interaction Between UV Radiation and Cholesteric Liquid Crystals

Haas, W.; Adams, James E.; Wysòcki, J. J.

doi:10.1080/15421406908084884

Cited by 64 publications

(20 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The selective reflection band of CLC progressively shifts to longer wavelength in proportion to the exposure energy of UV light due to a photolysis reaction of CI. 69 Nuclear magnetic resonance spectral measurement confirms that signal intensity of a terminal proton attached to CI monotonously decreases with exposure to UV light. Consumption of 20% in molar ratio of CI by exposure to UV light of 1.0 J cm À2 results in a large shift of the selective reflection band of CLC from 550 to 720 nm.…”

Section: Phototunable Laser Action From Clcsmentioning

confidence: 73%

Self-assembled organic and polymer photonic crystals for laser applications

Furumi

2012

Polym J

View full text Add to dashboard Cite

This article describes an overview of recent developments in fabrication and uses of self-assembled photonic crystals (PCs) of organic and polymer materials, such as chiral liquid crystals (CLCs) and colloidal crystals (CCs), for laser applications. Both CLCs and CCs have intrinsic capabilities to spontaneously assemble 1D-PC and 3D-PC structures, respectively. When a periodic length in the PC structures of CLCs and CCs corresponds to several hundred nanometers of the light wavelength, the photonic band-gaps (PBGs) can be visualized as Bragg reflection colors. When combining fluorescence dyes in the CLCs and CCs, the stimulated laser action at PBG band edge(s) or within the PBG wavelength can be generated by optical excitation. Moreover, the optically excited laser action is controllable by external stimuli due to the self-organization of CLCs and CCs. This review highlights not only the research backgrounds of CLC and CC structures as PCs, but also the experimental results of their versatile soft and tunable laser applications. We believe that a wide variety of CLC and CC structures will have leading roles in the next generation of optoelectronic devices of organic and polymer materials.

show abstract

Section: Phototunable Laser Action From Clcsmentioning

confidence: 73%

Self-assembled organic and polymer photonic crystals for laser applications

Furumi

2012

Polym J

View full text Add to dashboard Cite

show abstract

“…Adams and Haas investigated the pitch change in cholesteryl nonanoate/cholesteryl iodide by ultraviolet (UV) irradiation. [37,38] Upon irradiation, photodecomposition of cholesteryl iodide reduces its ratio in the mixed system, thus resulting in a cholesteric pitch change. In studies concerning the effect of a small amount of a photochromic dopant, Sackmann reported a pitch change induced by reversible photochemical reactions such as photoisomerization of azobenzene and stilbene in a mixture of cholesteryl chloride and cholesteryl nonanoate.…”

Section: Photochemical Control Of Cholesteric Pitchmentioning

confidence: 99%

Cholesteric Liquid Crystals for Color Information Technology

2001

View full text Add to dashboard Cite

show abstract

“…[7] In the case of a two-component system Eq, [7] has a unique solution (since a2 = 1 --al) given by Assume some differential stimulus, ds, actually changes only ERP.…”

Section: Theorymentioning

confidence: 99%

“…The effect studied involves the change in pitch of a cholesteric film resulting from exposure to ultraviolet light (6)(7)(8)(9). We present here an experimental example of this principle.…”

mentioning

confidence: 99%