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Localized Light Focusing and Super Resolution Readout via Chalcogenide Thin Film

Published online by Cambridge University Press:  01 February 2011

Junji Tominaga ,
Paul Fons ,
Takayuki Shima ,
Kazuma Kurihara ,
Takashi Nakano ,
Alexander Kolobov  and
Stephane Petit
Junji Tominaga
Affiliation:
j-tominaga@aist.go.jp, National Institute of Advanced Industrial Science and Technology, Center for Applied Near-Field Optics Research, Tsukuba Central 4, 1-1-1 Higashi, Tsukuba, Japan, N/A, 305-8562, Japan
Paul Fons
Affiliation:
paul-fons@aist.go.jp, National Institute of Advanced Industrial Science and Technology, Center for Applied Near-Field Optics Research, Tsukuba, N/A, 305-8562, Japan
Takayuki Shima
Affiliation:
t-shima@aist.go.jp, National Institute of Advanced Industrial Science and Technology, Center for Applied Near-Field Optics Research, Tsukuba, N/A, 305-8562, Japan
Kazuma Kurihara
Affiliation:
k.kurihara@aist.go.jp, National Institute of Advanced Industrial Science and Technology, Center for Applied Near-Field Optics Research, Tsukuba, N/A, 305-8562, Japan
Takashi Nakano
Affiliation:
t-nakano@aist.go.jp, National Institute of Advanced Industrial Science and Technology, Center for Applied Near-Field Optics Research, Tsukuba, N/A, 305-8562, Japan
Alexander Kolobov
Affiliation:
a.kolobov@aist.go.jp, National Institute of Advanced Industrial Science and Technology, Center for Applied Near-Field Optics Research, Tsukuba, N/A, 305-8562, Japan
Stephane Petit
Affiliation:
stephane.petit@aist.go.jp, National Institute of Advanced Industrial Science and Technology, Center for Applied Near-Field Optics Research, Tsukuba, N/A, 305-8562, Japan
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Abstract

We have demonstrated that certain chalcogenide layers within a spinning super-RENS optical disc allow to squeeze the 650 nm laser beam to a spot size as fine as 50 nm using a 15-nm chalcogenide film. The near-field light was focused at a depth of just over 30 nm after passing through a chalcogenide film. Finite-difference time-domain (FDTD) simulations also reproduced these results. We suggest that a conductive ring aperture generated in the chalcogenide layers plays an important role in the localized light focusing.

Keywords

optical propertiesphase transformationnanostructure

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 918: Symposium H – Chalcogenide Alloys for Reconfigurable Electronics , 2006 , 0918-H06-01-G07-01
Copyright
Copyright © Materials Research Society 2006

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