Liquid-crystalline blue phase laser with widely tunable wavelength.

Adv Mater

Department of Advance Materials Engineering for Information and Electronics/Regional, Innovation Center-Components and Materials for Information Display, Kyung Hee University, Yongin-shi, Gyeonggi-do 446-701, Korea.

Published: June 2013

A lasing peak shift of more than 100 nm is realized due to the large shift of a photonic bandgap of a liquid-crystalline blue phase.

Download full-text PDF

Source
http://dx.doi.org/10.1002/adma.201204591DOI Listing

Publication Analysis

Top Keywords

liquid-crystalline blue
8
blue phase
8
phase laser
4
laser tunable
4
tunable wavelength
4
wavelength lasing
4
lasing peak
4
peak shift
4
shift 100
4
100 realized
4

Similar Publications

Circularly Polarized Room-Temperature Phosphorescence from Dye-Doped Cholesteric Liquid Crystalline Polymer Networks.

J Phys Chem Lett

January 2025

Laboratory of Advanced Optoelectronic Materials, Suzhou Key Laboratory of Novel Semiconductor-Optoelectronics Materials and Devices, State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Engineering Laboratory of Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.

Circularly polarized luminescence (CPL) materials have drawn increasing attention for their potential applications in optical displays and chemo/biosensing. Nevertheless, the construction of circularly polarized room-temperature phosphorescence (CPRTP) materials is still a significant challenge. In this work, four liquid crystalline polymer network films with RTP properties have been fabricated via photopolymerization of cholesteric liquid-crystalline mixtures containing different amounts of commercially available dyes.

View Article and Find Full Text PDF

This paper presents the reversible transformation between two polymorphs of a hexacatenar liquid crystal () with distinct fluorescence colors at room temperature (RT). This method utilizes mechanical pressure (mechanochromism) and an electric field (E-field-chromism). The molecule (), designed with a pyrene core and 1,2,3-triazole linkers, exhibits a blue-emissive crystalline (CRY) polymorph () and a green-emissive liquid crystalline (LC) polymorph () at RT, depending on the cooling rate from the liquid phase.

View Article and Find Full Text PDF

Cellulose nanocrystals (CNCs) are known to self-assemble into a left-handed chiral nematic lyotropic liquid crystalline phase in water. When captured in the solid state, this structure can impart films with photonic properties that make them promising candidates in photonics, sensing, security, and other areas. Unfortunately, the intrinsic hydrophilicity of CNCs renders these iridescent films susceptible to moisture, thereby limiting their practicality.

View Article and Find Full Text PDF
Article Synopsis
  • The text examines phase transitions, specifically martensitic transformations, which involve the movement of atoms in a coherent way to shift from one crystalline structure to another, and highlights recent experimental observations in soft materials.
  • The study utilizes direct simulations of a liquid crystalline blue phase (BP II) to analyze the dynamic transition to another phase (BP I) through a machine-learning approach to identify local structures and defects.
  • Findings reveal that this transformation can be triggered by the breakup of line defect junctions and can be reversed by changing temperature, shedding light on complex structural changes in ordered materials more broadly.
View Article and Find Full Text PDF

The results of an experimental investigation of the temperature and wavelength dependence of the Kerr constant () of mixtures with an increasing amount of chiral dopant in an isotropic liquid crystal phase are reported. The material was composed of a nematic liquid crystal (5CB) and a chiral dopant (CE2), which formed non-polymer-stabilized liquid crystalline blue phases with an exceptionally large value of ∼2 × 10 mV. The measurements were performed on liquid and blue phases at several concentrations covering a range of temperatures and using three wavelengths: 532 nm, 589 nm and 633 nm.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!