Periodic metallo-dielectric structure in diamond.
Intense ultrashort light pulses induce three dimensional localized phase transformation of diamond. Photoinduced amorphous structures have electrical conducting properties of a maximum of 64 S/m based on a localized transition from sp(3) to sp(2) in diamond. The laser parameters of fluence and scanning speed affect the resultant electrical conductivities due to recrystallization and multi-filamentation phenomena. We demonstrate that the laser-processed diamond with the periodic cylinder arrays have the characteristic transmission properties in terahertz region, which are good agreement with theoretical calculations. The fabricated periodic structures act as metallo-dielectric photonic crystal.
Shimizu
M
M
Department of Material Chemistry, Kyoto University, Katsura, Kyoto, Japan.
Shimotsuma
Y
Y
Sakakura
M
M
Yuasa
T
T
Homma
H
H
Minowa
Y
Y
Tanaka
K
K
Miura
K
K
Hirao
K
K
D003460:Crystallization; D003461:Crystallography; D018130:Diamond; D004553:Electric Conductivity; D007700:Kinetics; D007834:Lasers; D008027:Light; D008962:Models, Theoretical; D037742:Nanotubes, Carbon; D016011:Normal Distribution; D055095:Optics and Photonics; D012542:Scattering, Radiation; D013499:Surface Properties; D014965:X-Rays
D037742:Nanotubes, Carbon; D018130:Diamond