Multilayered optical bit memory with a high signal-to-noise ratio in fluorescent polymethylmethacrylate

We report on the three-dimensional optical memory utilizing a photoluminescence (PL) change in polymethylmethacrylate. Irradiation with a femtosecond pulsed laser (800 nm, 1 kHz, 100 fs) induced a strong PL spectrum in the visible range, which may result from the photogeneration of emissive radicals...

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Veröffentlicht in:	Applied physics letters 2009-03, Vol.94 (11)
Hauptverfasser:	Nie, Zhaogang, Lee, Heungyeol, Yoo, Hyeonggeun, Lee, Youlee, Kim, Younshil, Lim, Ki-Soo, Lee, Myeongkyu
Format:	Artikel
Sprache:	eng
Schlagworte:	CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS FOCUSING LASERS LAYERS MICROSCOPES PHOTOLUMINESCENCE POLYMERS RADICALS REFLECTION SIGNAL-TO-NOISE RATIO
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container_issue	11
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container_title	Applied physics letters
container_volume	94
creator	Nie, Zhaogang Lee, Heungyeol Yoo, Hyeonggeun Lee, Youlee Kim, Younshil Lim, Ki-Soo Lee, Myeongkyu
description	We report on the three-dimensional optical memory utilizing a photoluminescence (PL) change in polymethylmethacrylate. Irradiation with a femtosecond pulsed laser (800 nm, 1 kHz, 100 fs) induced a strong PL spectrum in the visible range, which may result from the photogeneration of emissive radicals. Multilayered patterns were recorded inside the bulk sample by tightly focusing a pulsed laser beam. The pattern images were read out by a reflection-type fluorescent confocal microscope which detected the blue-green emission at 410–510 nm. The stored bits were retrieved with a high signal-to-noise ratio in the absence of any cross-talk.
doi_str_mv	10.1063/1.3103365
format	Article
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subjects	CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS FOCUSING LASERS LAYERS MICROSCOPES PHOTOLUMINESCENCE POLYMERS RADICALS REFLECTION SIGNAL-TO-NOISE RATIO
title	Multilayered optical bit memory with a high signal-to-noise ratio in fluorescent polymethylmethacrylate
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