Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session L16: Aqueous Solutions, Solvated Interfaces, and Ionic Polarization II
11:15 AM–2:15 PM,
Wednesday, March 6, 2019
BCEC
Room: 155
Sponsoring
Units:
DCOMP DCP
Chair: Jeffrey Greeley, Purdue University
Abstract: L16.00011 : TDDFT approach on laser field enhancement by carbon nanotube and photo-decomposition of water
Hong Zhang1, Yoshiyuki Miyamoto2, Xinlu Cheng1, Angel Rubio3
1College of Physical Science and Technology, Sichuan University, Chengdu 610065, China
1:39 PM–1:51 PM
Presenter:
Hong Zhang
(Physics, Sichuan University, China)
Author:
Hong Zhang
(Physics, Sichuan University, China)
In this presentation, we discuss field enhancement of femtosecond laser by carbon nanotubes and application to accelerating water photo-decomposition. The real-time time-dependent density functional theory (TDDFT) was employed for simulating water photo-decomposition near (8,0) semiconducting carbon nanotube. A short pulse with full-width of half-maximum 10fs was considered. When optical field is perpendicular to the tube axis, we found significant laser field enhancement corresponding to laser-power enhancement by factor 2 with laser wavelength 800 nm, and by factor around 8 with wavelength 400 nm. The enhancement is due to polarizability and wall-curvature of carbon nanotube that helps to reduce threshold power for photo-decomposition of water.
(Physics, Sichuan University, China)
(Physics, Sichuan University, China)
In this presentation, we discuss field enhancement of femtosecond laser by carbon nanotubes and application to accelerating water photo-decomposition. The real-time time-dependent density functional theory (TDDFT) was employed for simulating water photo-decomposition near (8,0) semiconducting carbon nanotube. A short pulse with full-width of half-maximum 10fs was considered. When optical field is perpendicular to the tube axis, we found significant laser field enhancement corresponding to laser-power enhancement by factor 2 with laser wavelength 800 nm, and by factor around 8 with wavelength 400 nm. The enhancement is due to polarizability and wall-curvature of carbon nanotube that helps to reduce threshold power for photo-decomposition of water.
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