Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session PP05: V: Optical, Electronic, Ionic, and Piezoelectric Properties of Polymers and Composites
9:00 AM–11:00 AM,
Tuesday, March 21, 2023
Room: Virtual Room 5
Sponsoring
Unit:
DPOLY
Chair: Bryan Boudouris, Purdue University
Abstract: PP05.00005 : Up-converted coherent light emission inside of polar nematic liquid crystalline media
9:48 AM–10:00 AM
Presenter:
DAICHI OKADA
(RIKEN center for emergent matter science)
Authors:
DAICHI OKADA
(RIKEN center for emergent matter science)
Fumito Araoka
(Riken center for emergent matter science)
Hiroya Nishikawa
(Riken center for emergent matter science)
By taking such advantages of PNLCs, we herein demonstrate a flexible up-conversion system of coherent light emission. By doping fluorescent molecule into PNLCs and placing that into an optical cavity consisting of two dielectric mirrors, PNLCs layer can equip two functions for laser oscillation and second harmonic generation (SHG), simultaneously. Upon excitation of the doped fluorescent molecules by a pulsed laser light, clear and sharp emission peak with nonlinearity is confirmed beyond a certain excitation threshold. Under the lasing regime, additional emission peaks at the half wavelengths of lasing peaks are also detected, meaning intra-cavity wavelength conversion through the SHG process. The SHG efficiency of the intracavity conversion process is several hundred times higher than that of outside cavity without the laser oscillation process. Such a brand-new type of flexible up-conversion device must be promising for future optical/optoelectric devices.
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