Response function of super-resolution readout of an optical disc studied by coupled electromagnetic–thermal simulation

• Haruyuki Sano

• Takayuki Shima

• Masashi Kuwahara

• Yoshiya Fujita

• Munehisa Uchiyama

• Yoshiyuki Aono

Abstract

To fully understand the properties of the readout signal in the super-resolution state, we implemented a multi-physics simulation of the propagation of electromagnetic waves and heat conduction in an optical disc that incorporates an InSb active layer. Response functions were obtained by calculating the light intensity reflected from a single small-pit structure. It was found that a typical response function in the super-resolution state has an asymmetric double-peak structure with high-spatial-frequency components. The complex profile of the response function indicated that the position of protrusions in the readout signal does not exactly correspond to that of the refractive index profile of the pit arrangement. We demonstrated that the measured readout signals also exhibit this particular characteristic and are roughly reproduced by the signals estimated from the response functions.

Journal

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 55 (9S), 09SB02-, 2016-07-28

  IOP Publishing

Keywords

• General Physics and Astronomy
• General Engineering

Details

• CRID: 1360566399844188544
• NII Article ID: 210000147098
• DOI: 10.7567/jjap.55.09sb02
• ISSN: 13474065
• ISSN: 00214922
• Web Site: http://stacks.iop.org/1347-4065/55/i=9S/a=09SB02/pdf
• Web Site: http://stacks.iop.org/1347-4065/55/i=9S/a=09SB02?key=crossref.adda9e3d7ad0629714a08776ce1affb3
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.55.09SB02
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.55.09SB02/pdf
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