Journal
ACS NANO
Volume 15, Issue 5, Pages 8753-8760Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.1c01001
Keywords
circularly polarized laser emission; chiral optical cavity; light-matter interaction; cellulose nanocrystal; chiral nematic structure
Categories
Funding
- Russell Berrie Nanotechnology Institute (RBNI)
- US Army CCDCAtlantic [W911NF-19-1-0334]
- Winograd Chair of Fluid Mechanics and Heat Transfer at Technion
- European Research Council (ERC) under the European Union [682157]
- [PRIN 2017PHRM8X]
- European Research Council (ERC) [682157] Funding Source: European Research Council (ERC)
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A method of fabricating circularly polarized lasers using cellulose nanocrystals and a laser dye through evaporation-induced assembly is presented, showing controlled chiral nematic structure and modification of laser polarization state into left-handed, resulting in strong and tailored CP laser emission.
Circularly polarized (CP) lasers derived from low- cost and renewable raw sources are attracting increasing attention in photonics and material science. Here, we present a facile and effective approach to fabricate CP lasers by the evaporation- induced assembly of cellulose nanocrystals (CNCs) and a laser dye. The obtained laser exhibits a controlled chiral nematic structure, which acts as a chiral optical cavity, and varied chiral coupling interactions. It is shown that the CNC-based laser can modify the polarization state of the laser into left-handed polarization, leading to strong CP laser emission (CPLE) with a dissymmetry factor up to 0.35. The chiral nematic CNC structure proves to be a versatile yet straightforward strategy to generate strong and tailored CPLE.
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