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Title: Study of the shape of an optical window in a super-resolution state by electromagnetic-thermal coupled simulation: Effects of melting of an active layer in an optical disc

We performed a multi-physics simulation for the propagation of electromagnetic waves and heat conduction in a super-resolution optical disc that includes an active layer of InSb. Because the change in the optical constant of InSb due to the phase transition is taken into account, the melting of the active layer can be realistically simulated in our calculation. It was found that in the case of an incident light power (P) of 2 mW, a profile of the electric field intensity transmitted through the InSb layer has an asymmetric shape with a narrow peak. This beam-narrowing was suggested to be an essential mechanism of the super-resolution, because a narrower light beam allows the detection of a smaller pit structure than the optical diffraction limit. This beam-narrowing was found to be originating from a small molten region produced in the InSb layer, which works as a mask for light exposure.
Authors:
 [1] ; ;  [2] ; ; ;  [3]
  1. Ishikawa National College of Technology, Kitacyujo, Tsubata, Ishikawa 929-0392 (Japan)
  2. National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565 (Japan)
  3. Pulstec Industrial Co., Ltd., 7000-35, Nakagawa, Hosoe-cho, Kita-ku, Hamamatsu 431-1304 (Japan)
Publication Date:
OSTI Identifier:
22273545
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 15; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ASYMMETRY; COMPUTERIZED SIMULATION; DIFFRACTION; ELECTRIC FIELDS; INDIUM ANTIMONIDES; LAYERS; MELTING; RESOLUTION; THERMAL CONDUCTION; VISIBLE RADIATION; WAVE PROPAGATION