Open AccessNanofabrication with controllable localization energy based on the interference modulation of surface plasmons
Author(s) -
Xingzhan Wei,
Chunlei Du,
Xiaochun Dong,
Xiangang Luo,
Qiling Deng,
Yudong Zhang
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.014404
Subject(s) - nanolithography , interference (communication) , optics , grating , materials science , surface plasmon , modulation (music) , plasmon , electric field , photoresist , energy (signal processing) , finite difference time domain method , optoelectronics , physics , nanotechnology , fabrication , telecommunications , computer science , medicine , channel (broadcasting) , alternative medicine , pathology , quantum mechanics , layer (electronics) , acoustics
A nanolithography technique based on the interference of surface plasmons (SPs) is proposed and demonstrated to modulate the localized exposure energy. The SP waves participating in interference are excited by two distinct structures, namely, the grating and the nanotaper. Constructive or destructive interference, which ultimately causes an enhanced or reduced modulation to the localized energy, can be obtained merely by adjusting the distance of the grating and the taper. Detailedly speaking, the localized energy can be modulated consecutively with a constant periodicity, and the modulation range of energy is extremely wide, for instance, the maximum energy is nearly 3 orders of magnitude larger than the minimum by our FDTD simulation results. Moreover, since the localized electric field at the taper tip, which leads to the exposure of the photoresist, is extremely sensitive to interference, it suggests a potential way to produce patterns with different depths and critical widths in one chip via beforehand programming and reasonably controlling the corresponding interference of SPs.