Electrically Controlled Lasing in Supercooled Liquid Crystal Blue Phase I Microdroplets

Petriashvili, Gia; Hamdi, Ridha; Chanishvili, Andro; Zurabishvili, Tsisana; Chubinidze, Ketevan; Ponjavidze, Nino

doi:10.1021/acsaelm.0c00279

Cited by 6 publications

(4 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[44] Therefore, probing light confinement in the BPLCs and using them as novel soft lasers are of great interest. Up to now, various BP lasers have been developed based on band-edge lasing, [42,45,46] distributed feedback lasing, [44] defect lasing, [47] and random lasing [48][49][50] using film confined in LC cells [51][52][53][54] or freestanding one. [42,43] Though much progress has been made on BP lasers in terms of the tunability of lasing wavelength under external stimuli, such as light, [55,56] electricity, [45,57,58] temperature, [48,51,54,[59][60][61][62] and mechanics, [63] the research focused on the working temperature of BP lasers is insufficient.…”

Section: Introductionmentioning

confidence: 99%

Over 200 °C Broad‐Temperature Lasers Reconstructed from a Blue‐Phase Polymer Scaffold

et al. 2022

View full text Add to dashboard Cite

Blue‐phase liquid crystal (BPLC) lasers have received extensive attention and have potential applications in sensors, displays, and anti‐counterfeiting, owing to their unique 3D photonic bandgap. However, the working temperature range of such BPLC lasers is insufficient, and investigations are required to elucidate the underlying mechanism. Herein, a broad‐temperature reconstructed laser is successfully achieved in dye‐doped polymer‐stabilized blue‐phase liquid crystals (DD‐PSBPLCs) with an unprecedented working temperature range of 25–230 °C based on a robust polymer scaffold, which combines the thermal stability and the tunability from the system. The broad‐temperature lasing stems from the high thermal stability of the robust polymerized system used, which affords enough reflected and matched fluorescence signals. The temperature‐tunable lasing behavior of the DD‐PSBPLCs is associated with the phase transition of the unpolymerized content (≈60 wt%) in the system, which endows with a reconstructed characteristic of BP lasers including a U‐shaped lasing threshold, a reversible lasing wavelength, and an obvious lasing enhancement at about 70 °C. This work not only provides a new idea for the design of broad‐temperature BPLC lasers, but also sets out important insight in innovative microstructure changes for novel multifunctional organic optic devices.

show abstract

Section: Introductionmentioning

confidence: 99%

Over 200 °C Broad‐Temperature Lasers Reconstructed from a Blue‐Phase Polymer Scaffold

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Compared with lattice distortion, field‐induced phase transition requires a much higher electric field strength and usually results in an irreversible and discontinuous shift in selective reflections. [ 149–153 ]…”

Section: Stimuli‐driven Bp Photonic Nanostructuresmentioning

confidence: 99%

3D Chiral Photonic Nanostructures Based on Blue‐Phase Liquid Crystals

Yang

2021

Small Science

View full text Add to dashboard Cite

3D photonic nanostructures with intrinsic chirality have recently entered the research limelight due to their fundamental importance and potential technological applications. Blue‐phase liquid crystals (BPLCs) with chiral cubic nanostructures are an inventive example of 3D chiral photonic nanostructures. The inherently self‐organized 3D chiral nanostructures give rise to a complete photonic bandgap, which results in the selective reflection of circularly polarized light in all three dimensions. Herein, a comprehensive review of the state‐of‐the‐art of BPLCs and their potential applications is presented. First, the history and fundamentals of BPLCs are introduced. Then, the recent endeavors in the design, synthesis, and properties of BPLCs such as lattice orientation control with different techniques, photonic bandgap tuning with external fields, and fabrication of free‐standing BPLC polymer films are summarized. Finally, a discussion of the future challenges and potential applications of BPLCs is provided. It is believed that this review would stimulate innovative ideas for the design and engineering of novel chiral nanostructured materials for advanced photonic systems with tailorable functionalities.

show abstract

“…[ 31 ] Much progress has been made on BPLC lasers. Typically, BPLC lasers with tunable emission wavelength have been investigated based on the variable PBG of BPLCs under external stimuli, such as electricity, [ 21,23,24,32 – 34 ] light, [ 35 ] heat, [ 28,31,36 ] mechanics, [ 11 ] and etc. More importantly, the broad temperature BPLC lasers have also received increasing attention due to the intrinsic characteristics of the narrow temperature window for BPLCs.…”

Section: Introductionmentioning

confidence: 99%

Super‐Wide Temperature Lasers Spanning from −180 to 240 °C Based on Fully‐Polymerized Blue Phase Superstructures

Chen,

Zheng,

Yang

et al. 2024

Advanced Materials

View full text Add to dashboard Cite

Blue phase liquid crystal (BPLC) lasers have potential applications in displays, sensors, and anti‐counterfeiting fields owing to their outstanding optical properties. However, there remain challenges on lasing below 0 °C, which significantly limits the potential application of BPLC lasers in low‐temperature environments. In this work, BPLC lasing below 0 °C was realized for the first time in a super‐wide temperature range of ‐180 ∼ 240 °C using a well‐designed fully‐polymerized BPLC system with a narrow line width of 0.0881 nm and a low lasing threshold of 37 nJ/pulse. This fully‐polymerized BPLC both effectively avoids low‐temperature random crystallization and has excellent compatibility with dye molecules that significantly widened the lasing temperature range below 0 °C. Besides, the variations of laser peak and threshold were also revealed below 0 °C, i.e., redshifted laser wavelength and increased threshold value with decreasing temperature, which contributed to a blue‐shifted laser signal and a U‐shaped lasing threshold in ‐180 ∼ 240 °C. These unique laser behaviors could be ascribed to the temperature‐dependent anisotropically microstructural deformation of BP lattice. This work not only opens a door to the development of low‐temperature BPLC lasers but also sets out important insights in the design of novel organic optical devices.This article is protected by copyright. All rights reserved

show abstract

Electrically Controlled Lasing in Supercooled Liquid Crystal Blue Phase I Microdroplets

Cited by 6 publications

References 26 publications

Over 200 °C Broad‐Temperature Lasers Reconstructed from a Blue‐Phase Polymer Scaffold

Over 200 °C Broad‐Temperature Lasers Reconstructed from a Blue‐Phase Polymer Scaffold

3D Chiral Photonic Nanostructures Based on Blue‐Phase Liquid Crystals

Super‐Wide Temperature Lasers Spanning from −180 to 240 °C Based on Fully‐Polymerized Blue Phase Superstructures

Contact Info

Product

Resources

About