Single-emitter nanocrystal fluorescence in liquid crystal hosts: nonclassical light sources with definite polarization

Svetlana G. Lukishova

doi:10.1117/12.3027883

30 September 2024 Single-emitter nanocrystal fluorescence in liquid crystal hosts: nonclassical light sources with definite polarization

Svetlana G. Lukishova

Author Affiliations +

Proceedings Volume 13121, Liquid Crystals XXVIII; 131210A (2024) https://doi.org/10.1117/12.3027883
Event: Organic Photonics + Electronics, 2024, San Diego, California, United States

Abstract

Overview is presented on using liquid crystals in single-photon sources (SPSs) exhibiting antibunching (separation of all photons in time) with definite linear or circular polarizations. SPSs are key components for secure, long-distance quantum communication systems with quantum repeaters. If we can produce a photon with definite polarization, the efficiency of the quantum cryptography system is doubled. Both nematic and cholesteric liquid crystal (CLC) hosts were used to create definite linear or circular polarization of antibunched photons emitted by different types of single emitters (dye molecules, colloidal semiconductor nanocrystal quantum dots (NQDs) with different fluorescence wavelengths, nitrogen-vacancy (NV) color-center nanodiamonds). Definite polarization from nanocrystals doped with trivalent rare-earth ions in liquid crystal hosts at low light level is also reported. Both monomeric and glassy oligomeric liquid crystal hosts have been used. Raman scattering in monomeric liquid crystals can prevent photon antibunching at some fluorescence wavelengths. A circular polarized microcavity resonance in NQD fluorescence in a 1-D photonic bandgap CLC microcavity and spontaneous emission enhancement as well as some pitfalls on purity of single-photon emission with using photoalignment materials are discussed (photoalignment materials’ fluorescence imaging may show single-emitter fluorescence behavior with emission of antibunched light).

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Svetlana G. Lukishova "Single-emitter nanocrystal fluorescence in liquid crystal hosts: nonclassical light sources with definite polarization", Proc. SPIE 13121, Liquid Crystals XXVIII, 131210A (30 September 2024); https://doi.org/10.1117/12.3027883

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE