Microstructural and optical analysis of superresolution phenomena due to Ge2Sb2Te5 thin films at blue light regime

Hyun Seok Lee; Taek Sung Lee; Yongwoon Lee; Jooho Kim; Suyoun Lee; Joo Youl Huh; Donghwan Kim; Byung Ki Cheong

doi:10.1063/1.3040695

Microstructural and optical analysis of superresolution phenomena due to Ge₂Sb₂Te₅ thin films at blue light regime

Hyun Seok Lee, Taek Sung Lee, Yongwoon Lee, Jooho Kim, Suyoun Lee, Joo Youl Huh, Donghwan Kim, Byung Ki Cheong

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

Superresolution (SR) phenomena due to Ge₂Sb₂Te ₅ films were examined by combined analysis of the transmission electron microscopy (TEM) microstructures of the laser-irradiated films and the results from dynamic and static tests using blue lasers. A new finding was made that comprises a complementary case of the classical SR readout by Ge ₂Sb₂Te₅ film; an amorphous band instead of a closed aperture of melt in the crystalline background forms behind a moving laser but still produces a high SR signal. A complete carrier-to-noise-ratio curve of a SR-read-only memory employing Ge₂Sb₂Te ₅ may be derived from a nonlinear optical effect, specifically thermally assisted saturable absorption.

Original language	English
Article number	221108
Journal	Applied Physics Letters
Volume	93
Issue number	22
DOIs	https://doi.org/10.1063/1.3040695
Publication status	Published - 2008

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3040695

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abstract = "Superresolution (SR) phenomena due to Ge2Sb2Te 5 films were examined by combined analysis of the transmission electron microscopy (TEM) microstructures of the laser-irradiated films and the results from dynamic and static tests using blue lasers. A new finding was made that comprises a complementary case of the classical SR readout by Ge 2Sb2Te5 film; an amorphous band instead of a closed aperture of melt in the crystalline background forms behind a moving laser but still produces a high SR signal. A complete carrier-to-noise-ratio curve of a SR-read-only memory employing Ge2Sb2Te 5 may be derived from a nonlinear optical effect, specifically thermally assisted saturable absorption.",

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AU - Lee, Hyun Seok

AU - Lee, Taek Sung

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AU - Kim, Jooho

AU - Lee, Suyoun

AU - Huh, Joo Youl

AU - Kim, Donghwan

AU - Cheong, Byung Ki

PY - 2008

Y1 - 2008

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AB - Superresolution (SR) phenomena due to Ge2Sb2Te 5 films were examined by combined analysis of the transmission electron microscopy (TEM) microstructures of the laser-irradiated films and the results from dynamic and static tests using blue lasers. A new finding was made that comprises a complementary case of the classical SR readout by Ge 2Sb2Te5 film; an amorphous band instead of a closed aperture of melt in the crystalline background forms behind a moving laser but still produces a high SR signal. A complete carrier-to-noise-ratio curve of a SR-read-only memory employing Ge2Sb2Te 5 may be derived from a nonlinear optical effect, specifically thermally assisted saturable absorption.

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Microstructural and optical analysis of superresolution phenomena due to Ge₂Sb₂Te₅ thin films at blue light regime

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