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Optical near-field simulation of Sb thin film thermal lens and its application in optical recording

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6 Author(s)
Wei, Jingsong ; Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, People’s Republic of China ; Zhou, Fei ; Wang, Yang ; Gan, Fuxi
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Using the finite-difference-time-domain method, the near-field optical distribution and properties of Sb thin film thermal lens are calculated and simulated. The results show as follows. Within the near-field distance to the output plane of thermal lens, the spot size is approximately 100 nm, and its intensity is greatly enhanced, which is higher than that of incident light. The spot shape gradually changes from ellipse to round at the distance of more than 12 nm to the output plane. The above-simulated results are further demonstrated by the static optical recording experiment.

Published in:

Journal of Applied Physics  (Volume:97 ,  Issue: 7 )