A near-infrared sensitive hybrid device, based on a Ru-doped BSO photorefractive substrate and polymer dispersed liquid crystal (PDLC) layer, is reported. It is found that the photoexcited charge carriers generated in the BSO:Ru substrate create an optically induced space charge field, sufficient to penetrate into the PDLC layer and to re-orient the LC molecules inside the droplets. Beam-coupling measurements at the Bragg regime are performed showing prospective amplification values and high spatial resolution. The proposed structure does not require indium tin oxide (ITO) contacts and alignment layers. Such a device allows all the processes to be controlled by light, thus opening further potential for real-time image processing at the near-infrared range.
© 2014 Optical Society of America
Original Manuscript: March 11, 2014
Revised Manuscript: April 24, 2014
Manuscript Accepted: April 26, 2014
Published: May 30, 2014
Ren Chung Liu, Vera Marinova, Shiuan Huei Lin, Ming-Syuan Chen, Yi-Hsin Lin, and Ken Yuh Hsu, "Near-infrared sensitive photorefractive device using polymer dispersed liquid crystal and BSO:Ru hybrid structure," Opt. Lett. 39, 3320-3323 (2014)