Abstract
Photochemically tunable photonic band gap materials were prepared by infiltration of liquid crystal polymers having azobenzene groups into voids of SiO2 inverse opal films. Linearly polarized light irradiation resulted in transformation from a random to an anisotropic molecular orientation of azobenzene side chains in the voids of the SiO2 inverse opal film, leading to the reversible and stable shift of the reflection band to longer wavelength more than 15 nm. In order to improve switching properties, we used copolymers with azobenzene monomer and tolane monomer, which indicate higher birefringence, as infiltration materials into the voids. The azo-tolane copolymers were found to show the higher birefringence than azobenzene homopolymers by the linearly polarized light irradiation. Thus, the reflection band of the SiO2 inverse opal film infiltrated with the azo-tolane copolymers was shifted to long wavelength region more than 55 nm by the irradiation of linearly polarized light.
| Original language | English |
|---|---|
| Title of host publication | Liquid Crystals XII |
| DOIs | |
| Publication status | Published - Nov 12 2008 |
| Event | Liquid Crystals XII - San Diego, CA, United States Duration: Aug 11 2008 → Aug 12 2008 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 7050 |
| ISSN (Print) | 0277-786X |
Other
| Other | Liquid Crystals XII |
|---|---|
| Country | United States |
| City | San Diego, CA |
| Period | 8/11/08 → 8/12/08 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering
Cite this
Photoswitching properties of photonic band gap materials containing azo-polymer liquid crystal. / Moritsugu, Masaki; Shirota, Tomomi; Kubo, Shoichi; Kim, Sun Nam; Ogata, Tomonari; Nonaka, Takamasa; Sato, Osamu; Kurihara, Seiji.
Liquid Crystals XII. 2008. 705014 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7050).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Photoswitching properties of photonic band gap materials containing azo-polymer liquid crystal
AU - Moritsugu, Masaki
AU - Shirota, Tomomi
AU - Kubo, Shoichi
AU - Kim, Sun Nam
AU - Ogata, Tomonari
AU - Nonaka, Takamasa
AU - Sato, Osamu
AU - Kurihara, Seiji
PY - 2008/11/12
Y1 - 2008/11/12
N2 - Photochemically tunable photonic band gap materials were prepared by infiltration of liquid crystal polymers having azobenzene groups into voids of SiO2 inverse opal films. Linearly polarized light irradiation resulted in transformation from a random to an anisotropic molecular orientation of azobenzene side chains in the voids of the SiO2 inverse opal film, leading to the reversible and stable shift of the reflection band to longer wavelength more than 15 nm. In order to improve switching properties, we used copolymers with azobenzene monomer and tolane monomer, which indicate higher birefringence, as infiltration materials into the voids. The azo-tolane copolymers were found to show the higher birefringence than azobenzene homopolymers by the linearly polarized light irradiation. Thus, the reflection band of the SiO2 inverse opal film infiltrated with the azo-tolane copolymers was shifted to long wavelength region more than 55 nm by the irradiation of linearly polarized light.
AB - Photochemically tunable photonic band gap materials were prepared by infiltration of liquid crystal polymers having azobenzene groups into voids of SiO2 inverse opal films. Linearly polarized light irradiation resulted in transformation from a random to an anisotropic molecular orientation of azobenzene side chains in the voids of the SiO2 inverse opal film, leading to the reversible and stable shift of the reflection band to longer wavelength more than 15 nm. In order to improve switching properties, we used copolymers with azobenzene monomer and tolane monomer, which indicate higher birefringence, as infiltration materials into the voids. The azo-tolane copolymers were found to show the higher birefringence than azobenzene homopolymers by the linearly polarized light irradiation. Thus, the reflection band of the SiO2 inverse opal film infiltrated with the azo-tolane copolymers was shifted to long wavelength region more than 55 nm by the irradiation of linearly polarized light.
UR - http://www.scopus.com/inward/record.url?scp=55549111228&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=55549111228&partnerID=8YFLogxK
U2 - 10.1117/12.794633
DO - 10.1117/12.794633
M3 - Conference contribution
AN - SCOPUS:55549111228
SN - 9780819472700
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Liquid Crystals XII
ER -