Properties of Super-Resolution Near-Field Structure with Platinum-Oxide Layer in Blu-ray Disc System

Kikukawa, Takashi; Fukuzawa, Narutoshi; Kobayashi, Tatsuhiro

doi:10.1143/jjap.44.3596

Cited by 24 publications

(34 citation statements)

References 6 publications

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“…[9][10][11][12] In this paper, we report on the thermal conductivities of three different Sb-Te alloy thin films (in the low-temperature crystalline state) as well as those of Sb and Te at room temperature. Sb-Te alloys are widely used as recording media for optical disks, as the functional layer of superresolution disks, 13,14) and as resistive-element materials in phase-change memory. 8) The thermal conductivity was measured using a nanosecond thermoreflectance measurement system (Nano-TheMS), a novel apparatus that can measure the thermal conductivity of nanometer-order thin films.…”

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confidence: 99%

Thermal Conductivity Measurements of Sb–Te Alloy Thin Films Using a Nanosecond Thermoreflectance Measurement System

Kuwahara

Сузукі

Taketoshi

et al. 2007

jjap

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Using a nanosecond thermoreflectance measurement system, which enables the measurement of the thermal conductivity of nanometer-scale thin films, we have measured the thermal conductivities of Sb 2 Te, Sb 2 Te 3 , SbTe 9 , Sb, and Te thin films at room temperature. We clarified that the thermal conductivities of Sb-Te alloys depend on the Sb and Te atomic ratios. A large change in thermal conductivity was observed in the vicinity of the composition ratio of Sb 2 Te 3 . We proposed that this large change may be attributable to the formation of an Sb atomic network in the crystalline structure of the Sb-Te alloy.

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mentioning

confidence: 99%

Thermal Conductivity Measurements of Sb–Te Alloy Thin Films Using a Nanosecond Thermoreflectance Measurement System

Kuwahara

Сузукі

Taketoshi

et al. 2007

jjap

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“…Furthermore, to eliminate the remaining small effect of the structural peculiarities, we carried out the average operation for the two sets of the calculated electronic and optical properties corresponding to the two liquid models with different structures. In the model of liquid InSb, we adopted the density of the crystalline state (5.78 g/cm 3 ) that was used by Los et al 16 in their MD calculation of InSb. The actual density of liquid InSb in the temperature range of 900-1500 K is approximately 5-11% larger than that of the crystalline state.…”

Section: Methodsmentioning

confidence: 99%

Ab initio calculations of the optical properties of crystalline and liquid InSb

Sano

Mizutani

2015

AIP Advances

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A new mixing of Hartree-Fock and local density-functional theories The Journal of Chemical Physics 98, 1372 (1993); 10.1063/1.464304 AIP ADVANCES 5, 117110 (2015) Ab initio calculations of the optical properties of crystalline and liquid InSb Ab initio calculations of the electronic and optical properties of InSb were performed for both the crystalline and liquid states. Two sets of atomic structure models for liquid InSb at 900 K were obtained by ab initio molecular dynamics simulations.To reduce the effect of structural peculiarities in the liquid models, an averaging of the two sets of the calculated electronic and optical properties corresponding to the two liquid models was performed. The calculated results indicate that, owing to the phase transition from crystal to liquid, the density of states around the Fermi level increases. As a result, the energy band gap opening near the Fermi level disappears. Consequently, the optical properties change from semiconductor to metallic behavior.

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“…2,3) These two technologies successfully provided a capacity of more than 2 -4 times larger than that of the Blu-ray disc (BD). 2,4) However, these cannot be directly applied to present optical disk systems because, for example, the objective lens of near-field optical recording are not compatible with those of DVDs or BDs.…”

Section: Introductionmentioning

confidence: 99%

Quadruple-Layer Write-Once Disk for Blue Laser Based on Te–O–Pd Recording Films

Habuta

Tomiyama

Takahashi

et al. 2008

jjap

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The excellent performance of a 100-GB-capacity write-once disk was demonstrated. The disk has quadruple recording layers, i.e., Layer 3, 2, 1, and 0 (from the laser-incident side of the disk) based on the 4Â Blu-ray disc (BD) format. Each layer is provided with a phase-change type memory film of Te-O-Pd, whose thickness was 20 nm for Layer 0, and only 6 nm for Layers 1, 2, and 3 in order to obtain high transmissivity. Additionally, for Layers 2 and 3, a metallic reflection layer was not needed and an AlN film with high thermal conductivity was formed next to each recording film. The AlN film suppressed the heat-induced damage of thin recording films. Consequently, the high transmissivities of 64% (Layer 1), 75% (Layer 2), and 81% (Layer 3) were achieved so that a quadruple layer disk with high quality was realized. The experimental disk showed tolerance to a wide range of writing speeds from 1Â (36 Mbps) to 4Â (144 Mbps). Good jitter values for each layer within an available maximum laser power of 27 mW on the disk were demonstrated. The acceleration test for lifetime using the Arrhenius plots showed that this write-once disk has an estimated lifetime of more than 100 years at 30 C and 85% relative humidity (RH).

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Properties of Super-Resolution Near-Field Structure with Platinum-Oxide Layer in Blu-ray Disc System

Cited by 24 publications

References 6 publications

Thermal Conductivity Measurements of Sb–Te Alloy Thin Films Using a Nanosecond Thermoreflectance Measurement System

Thermal Conductivity Measurements of Sb–Te Alloy Thin Films Using a Nanosecond Thermoreflectance Measurement System

Ab initio calculations of the optical properties of crystalline and liquid InSb

Quadruple-Layer Write-Once Disk for Blue Laser Based on Te–O–Pd Recording Films

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