Title :
Surface plasmons enhanced super-resolution focusing of radially polarized beam
Author :
Gao, Xingyu ; Xiao, Zexin ; Ning, Lihua
Author_Institution :
Sch. of Mech. & Electr. Eng., Guilin Univ. of Electron. Technol., Guilin, China
Abstract :
We present the formulations of piecewise linear recursive revolution (PLRC) method for implementing the Drude-Lorentz model of dispersive media in finite difference time domain (FDTD) method. A Krestschmann-type surface plasmon resonance (SPR) device is simulated to verify our FDTD code. The FDTD simulation of surface plasmons (SPs) enhanced focus excited by radially polarized evanescent focal beam is demonstrated and discussed. The super-resolved SPs focus phenomenon can be interpreted in terms of the SPs dispersion relation satisfied by the thin ring beam illumination.
Keywords :
finite difference time-domain analysis; light polarisation; optical focusing; piecewise linear techniques; surface plasmon resonance; Drude-Lorentz model; Krestschmann-type surface plasmon resonance; dispersive media; finite difference time domain method; piecewise linear recursive revolution; radially polarized beam; superresolution focusing; thin ring beam illumination; Dispersion; Films; Finite difference methods; Optical surface waves; Plasmons; Silver; Time domain analysis; FDTD; PLRC; radially polarized beam; super-resolution; surface plasmons;
Conference_Titel :
Advances in Optoelectronics and Micro/Nano-Optics (AOM), 2010 OSA-IEEE-COS
Conference_Location :
Guangzhou
Print_ISBN :
978-1-4244-8393-8
Electronic_ISBN :
978-1-4244-8392-1
DOI :
10.1109/AOM.2010.5713551
