TY - JOUR
T1 - Optimization of light diffraction efficiency and its enhancement from a doped-PMMA volume holographic material
AU - Hsieh, Mei-Li
AU - Chen, Wei-Cheng
AU - Hong, Chen-Yu
AU - Lin, Shawn Yu
PY - 2013/9/1
Y1 - 2013/9/1
N2 - In this paper, we study the diffraction efficiency from the volume gratings in holographic materials, PQJ PMMA, and their efficiency-enhancement in an optically dark environment (dark enhancement). We show that the diffraction efficiency is increased in real-time by light-exposure and then by a slow diffusion process in the dark after light-exposure. We observe strong correlations between the efficiency, the light-exposure energy and the dark-enhancement. Furthermore, we establish an optimum condition for light-exposure and dark-enhancement. Accordingly, we simultaneously achieve the best diffraction-efficiency of 82% for a 2 mm thick PQ/PMMA and an efficiency-enhancement of 3.1 times after exposure, approaching the theoretical limit of 4 times. Published by Elsevier B.V.
AB - In this paper, we study the diffraction efficiency from the volume gratings in holographic materials, PQJ PMMA, and their efficiency-enhancement in an optically dark environment (dark enhancement). We show that the diffraction efficiency is increased in real-time by light-exposure and then by a slow diffusion process in the dark after light-exposure. We observe strong correlations between the efficiency, the light-exposure energy and the dark-enhancement. Furthermore, we establish an optimum condition for light-exposure and dark-enhancement. Accordingly, we simultaneously achieve the best diffraction-efficiency of 82% for a 2 mm thick PQ/PMMA and an efficiency-enhancement of 3.1 times after exposure, approaching the theoretical limit of 4 times. Published by Elsevier B.V.
KW - Holographic optical elements; Volume gratings; Polymers
U2 - 10.1016/j.optcom.2013.06.012
DO - 10.1016/j.optcom.2013.06.012
M3 - Article
VL - 308
SP - 121
EP - 124
JO - Optics Communications
JF - Optics Communications
SN - 0030-4018
ER -