Super-resolution by elliptical bubble formation with PtO[sub x] and AgInSbTe layers

Jooho Kim; Inoh Hwang; Duseop Yoon; Insik Park; Dongho Shin; Takashi Kikukawa; Takayuki Shima; Junji Tominaga
September 2003
Applied Physics Letters;9/1/2003, Vol. 83 Issue 9, p1701
Academic Journal
The recording and retrieval of signals below 100 nm mark length were attempted with elliptical bubble-type super-resolution technology with platinum oxide (PtO[sub x]) and ductile AgInSbTe layers, using the same optical system as that of a digital versatile disk (a 635 nm wavelength red laser system). The carrier-to-noise ratio (CNR) of over 47 dB for 100 nm mark length signals (over 43 dB for 80 nm mark length signals) was obtained, which can be considered as a commercially acceptable level of CNR. The recording mechanism of the sample disk was shown through the transmission electron microscopy cross-section image observation to be by rigid elliptical bubble formation at the PtO[sub x] layer located between the AgInSbTe layers. The results of this report represent the potential for a much higher-density storage using the red laser system and a subterabyte optical storage using the blue laser system. © 2003 American Institute of Physics.


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