TY - JOUR
T1 - Enhanced resolution induced by random silver nanoparticles in near-field optical disks
AU - Chu, Tai Chi
AU - Liu, Wei Chih
AU - Tsai, Din Ping
N1 - Funding Information:
This work was supported by the National Science Council and the Ministry of Economical Affair (93-EC-17-A-08-S1-0006) of Taiwan, Republic of China.
PY - 2005/2/15
Y1 - 2005/2/15
N2 - The super-resolution near-field structure (super-RENS) is a high-density near-field optical data storage medium which can achieve superior spatial resolution beyond the diffraction limit. Our previous studies found that enhanced local optical intensity occurred at the near fields of super-RENS disks, and the nonlinear near-field optical enhancement is related to the localized surface plasmons of silver clusters dissociated from the AgO x layer in the super-RENS disks. In this paper, we studied the near-field and far-field properties of AgOx-type super-RENS with different distributions of silver nanoparticles using finite-difference time-domain (FDTD) simulations. Highly localized enhancements are found between adjacent silver nanoparticles in the near fields. The far-field signals of different silver nanoparticles distributions confirm the super-resolution capability of AgOx-type Super-RENS disks, and a simplified Fourier optics model is used to describe the relation between highly localized near-field distributions and enhanced resolution of far-field signals.
AB - The super-resolution near-field structure (super-RENS) is a high-density near-field optical data storage medium which can achieve superior spatial resolution beyond the diffraction limit. Our previous studies found that enhanced local optical intensity occurred at the near fields of super-RENS disks, and the nonlinear near-field optical enhancement is related to the localized surface plasmons of silver clusters dissociated from the AgO x layer in the super-RENS disks. In this paper, we studied the near-field and far-field properties of AgOx-type super-RENS with different distributions of silver nanoparticles using finite-difference time-domain (FDTD) simulations. Highly localized enhancements are found between adjacent silver nanoparticles in the near fields. The far-field signals of different silver nanoparticles distributions confirm the super-resolution capability of AgOx-type Super-RENS disks, and a simplified Fourier optics model is used to describe the relation between highly localized near-field distributions and enhanced resolution of far-field signals.
KW - Finite-difference time-domain method
KW - High-density optical disks
KW - Localized surface plasmon
KW - Near-field optical storage
KW - Optical disks
KW - Super-resolution near-field structure
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U2 - 10.1016/j.optcom.2004.11.001
DO - 10.1016/j.optcom.2004.11.001
M3 - Article
AN - SCOPUS:13544260523
SN - 0030-4018
VL - 246
SP - 561
EP - 567
JO - Optics Communications
JF - Optics Communications
IS - 4-6
ER -