Femtosecond phase control of spatial localization of the optical near-field in a metal nanoslit array.
We demonstrate spatial control of optical near-fields by femtosecond phase shaping in one-dimensional plasmonic structures. The near-field images display striking temporal-phase dependence, switching between double- and single-peak images within one lattice constant. The change of the near-field distribution is studied in the time and spectral domain. The spectral composition change observed by varying the time delay between two phase-locked femtosecond pulses explains the spatial control of the near-field images. Modal expansion calculations of linear light transmission using the surface impedance boundary condition are in excellent agreement with experiments.
Choi
Soobong
S
Department of Physics and Astronomy, Seoul National University, Seoul 151-742, Korea.
Park
Doojae
D
Lienau
C
C
Jeong
Mun Seok
MS
Byeon
Clare C
CC
Ko
Do-Kyeong
DK
Kim
D S
DS
D003198:Computer Simulation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008670:Metals / Q000737:chemistry*; D008962:Models, Theoretical; D036103:Nanotechnology / Q000295:instrumentation*; D055095:Optics and Photonics / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation
D008670:Metals