Room temperature single-photon source:
Single-dye molecule fluorescence in liquid crystal host
Svetlana G. Lukishova, Ansgar W. Schmid, Andrew J. McNamara,
Robert W. Boyd, and Carlos R. Stroud, Jr.
IEEE J. Selected Topics Quant. Electron. 9, 1512 (2003).
Click here to download the .pdf version of the paper
lukishova031.pdf (1 MB)
We report on new approaches toward an implementation of an efficient, room temperature,
deterministically polarized, single-photon source (SPS) on demand—a key hardware
element for quantum information and quantum communication. Operation of a room temperature
SPS is demonstrated via photon antibunching in the fluorescence from single terrylene-dye
molecules embedded in a cholesteric liquid crystal host. Using oxygen-depleted liquid crystal
hosts, dye-bleaching was avoided over the course of more than 1 h of continuous 532-nm excitation.
Liquid crystal hosts (including liquid crystal oligomers/polymers) permit further increase
of the efficiency of the source: 1) by aligning the dye molecules along a direction preferable
for maximum excitation efficiency; 2) by tuning a one-dimensional (1-D) photonic-band-gap
microcavity of planar-aligned cholesteric (chiral nematic) liquid crystal layer to the dye
Web page maintained by
Hideomi Nihira ( firstname.lastname@example.org ).
Last modified 13 September 2006