Abstract
Localized near field on a nanostructure has been attracting much attention for a template for size-selective optical trapping beyond the diffraction limit. The near-field optical trapping has mainly been studied by using metallic substrates such as Au nanodot pairs, periodic Al nanoslits, and nanoapertures in an Au film. In this paper, we newly design a Miescattered near-field optical trapping scheme for size-selective photocatalysis by using pairs of poly-rutile TiO 2 nanospheres. The optical intensity distribution in a gap between the nanospheres was simulated by a FDTD (Finite- Difference Time-Domain) method. The simulation system consists of two nanospheres of 240 nm in diameter placed on a silica substrate in water. The 400 nm excitation laser is used for both the near-field generation and the photocatalyst pumping. The optical force for the trapping was calculated based on the near-field intensity distribution. The results suggest that the optical force generated by the proposed system is sufficient for near-field optical trapping which provides size-selective photocatalysis for killing virus, etc.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 8274 |
| DOIs | |
| Publication status | Published - 2012 |
| Event | Complex Light and Optical Forces VI - San Francisco, CA, United States Duration: 2012 Jan 25 → 2012 Jan 26 |
Other
| Other | Complex Light and Optical Forces VI |
|---|---|
| Country | United States |
| City | San Francisco, CA |
| Period | 12/1/25 → 12/1/26 |
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Keywords
- Near field
- Optical trapping
- Size-selective photocatalysis
- TiO
ASJC Scopus subject areas
- Applied Mathematics
- Computer Science Applications
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
Enhanced near-field properties of a gap of TiO 2 nanosphere pairs for 3D photocatalytic optical trap. / Honda, Toshiyuki; Terakawa, Mitsuhiro; Obara, Minoru.
Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8274 2012. 82740Z.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Enhanced near-field properties of a gap of TiO 2 nanosphere pairs for 3D photocatalytic optical trap
AU - Honda, Toshiyuki
AU - Terakawa, Mitsuhiro
AU - Obara, Minoru
PY - 2012
Y1 - 2012
N2 - Localized near field on a nanostructure has been attracting much attention for a template for size-selective optical trapping beyond the diffraction limit. The near-field optical trapping has mainly been studied by using metallic substrates such as Au nanodot pairs, periodic Al nanoslits, and nanoapertures in an Au film. In this paper, we newly design a Miescattered near-field optical trapping scheme for size-selective photocatalysis by using pairs of poly-rutile TiO 2 nanospheres. The optical intensity distribution in a gap between the nanospheres was simulated by a FDTD (Finite- Difference Time-Domain) method. The simulation system consists of two nanospheres of 240 nm in diameter placed on a silica substrate in water. The 400 nm excitation laser is used for both the near-field generation and the photocatalyst pumping. The optical force for the trapping was calculated based on the near-field intensity distribution. The results suggest that the optical force generated by the proposed system is sufficient for near-field optical trapping which provides size-selective photocatalysis for killing virus, etc.
AB - Localized near field on a nanostructure has been attracting much attention for a template for size-selective optical trapping beyond the diffraction limit. The near-field optical trapping has mainly been studied by using metallic substrates such as Au nanodot pairs, periodic Al nanoslits, and nanoapertures in an Au film. In this paper, we newly design a Miescattered near-field optical trapping scheme for size-selective photocatalysis by using pairs of poly-rutile TiO 2 nanospheres. The optical intensity distribution in a gap between the nanospheres was simulated by a FDTD (Finite- Difference Time-Domain) method. The simulation system consists of two nanospheres of 240 nm in diameter placed on a silica substrate in water. The 400 nm excitation laser is used for both the near-field generation and the photocatalyst pumping. The optical force for the trapping was calculated based on the near-field intensity distribution. The results suggest that the optical force generated by the proposed system is sufficient for near-field optical trapping which provides size-selective photocatalysis for killing virus, etc.
KW - Near field
KW - Optical trapping
KW - Size-selective photocatalysis
KW - TiO
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UR - http://www.scopus.com/inward/citedby.url?scp=84857538177&partnerID=8YFLogxK
U2 - 10.1117/12.907207
DO - 10.1117/12.907207
M3 - Conference contribution
SN - 9780819489173
VL - 8274
BT - Proceedings of SPIE - The International Society for Optical Engineering
ER -