AVS 46th International Symposium
    Nanometer-scale Science and Technology Division Monday Sessions
       Session NS-MoM

Paper NS-MoM8
Study of the Super-resolution Near-field Structure for Optical Storage

Monday, October 25, 1999, 10:40 am, Room 6C

Session: Nanotechnology
Presenter: F.H. Ho, National Chung Cheng University, Taiwan
Authors: F.H. Ho, National Chung Cheng University, Taiwan
D.P. Tsai, National Chung Cheng University, Taiwan
C.W. Yang, National Chung Cheng University, Taiwan
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We present the study of the mechanism of surface plasmons enhanced super resolution near-field structure, glass/SiN/Sb/SiN, for optical storage. Nonlinear near-field optical effects of the glass/SiN/Sb/SiN on the transmitted light spot were experimentally observed by a tapping-mode tuning fork near-field scanning optical microscope. Imaging results of the near-field intensity gradients showed that focused light spot through the super resolution optical near-field structure, glass/SiN/Sb/SiN, consists of a normal propagating term and an evanescent term resulting from the laser-excited surface plasmon of the Sb thin film. Results also demonstrated the spot size of the evanescent field intensity can be manipulated by the detecting sensitivity of PMT, while the spot sizes of the propagating intensity remained the same. The working principle of the reduction of the focused spot size and the transfer of near-field photo-thermal energy from Sb/SiN interface to the recording layer are explained.