Imaging of Digital Versatile Rewritable Disc using the Reflection-Mode Scattering-Type Scanning Near-Field Optical Microscope

Imaging of Digital Versatile Rewritable Disc using the Reflection-Mode Scattering-Type Scanning Near-Field Optical Microscope

Recording marks written on the digital versatile rewritable disc (so called DVD-RAM) by a blue violet laser diode were observed using a reflection-mode scattering-type scanning near-field optical microscope (RS-SNOM) for the first time. The RS-SNOM is based on the atomic force microscope (AFM) and t...

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Veröffentlicht in:Japanese Journal of Applied Physics 2001-03, Vol.40 (3S), p.1578
Hauptverfasser: Yamaguchi, Mitsushiro, Sasaki, Yasuo, Sasaki, Hiroko, Konada, Takeshi, Ebina, Atsushi, Umezawa, Tomokazu, Horiguchi, Tohru
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container_end_page
container_issue 3S
container_start_page 1578
container_title Japanese Journal of Applied Physics
container_volume 40
creator Yamaguchi, Mitsushiro
Sasaki, Yasuo
Sasaki, Hiroko
Konada, Takeshi
Ebina, Atsushi
Umezawa, Tomokazu
Horiguchi, Tohru
description Recording marks written on the digital versatile rewritable disc (so called DVD-RAM) by a blue violet laser diode were observed using a reflection-mode scattering-type scanning near-field optical microscope (RS-SNOM) for the first time. The RS-SNOM is based on the atomic force microscope (AFM) and thus both the AFM and SNOM observations are simultaneously performed. In the AFM image, the land/groove structure was clearly observed and no other contrast appeared, while in the SNOM image, the 180-nm-long recording marks were clearly observed at the position of the groove. The contrast originated from the difference in the refractive index, faithfully traced in the SNOM image with a resolution of 50 nm. This result indicates that the RS-SNOM can be used as an observation tool for the next-generation high-density optical media.
doi_str_mv 10.1143/JJAP.40.1578
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title Imaging of Digital Versatile Rewritable Disc using the Reflection-Mode Scattering-Type Scanning Near-Field Optical Microscope
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