Junji Tominaga et al 2004 Nanotechnology 15 411 doi:10.1088/0957-4484/15/5/001
Ferroelectric catastrophe: beyond nanometre-scale optical resolution
Junji Tominaga, Takayuki Shima, Masashi Kuwahara, Toshio Fukaya, Alexander Kolobov and Takashi Nakano
Show affiliationsThe optical diffraction limit is rigidly determined as a simple equation of wavelength λ and lens numerical aperture NA (
): λ/2/NA. In this paper, we report that Ag5.8In4.4Sb61.0Te28.8 and Ge2Sb2Te5 chalcogenide thin films, which are typical of optical recording materials used in digital versatile discs (DVDs), enable a resolution of under λ/10 due to their ferroelectric properties. In the Ag5.8In4.4Sb61.0Te28.8 film it was found that this optical super-resolution can be observed between 350 and 400 °C, resulting in a second phase transition from a hexagonal (A7 belonging to 
) to a rhombohedral structure of R32 or R3m. In Ge2Sb2Te5, on the other hand, the temperature range is much wider, between 250 and 450 °C, which is also due to a second phase transition from a NaCl-type fcc to a hexagonal structure.
- PACS
-
42.70.Ln Holographic recording materials; optical storage media
77.84.Bw Elements, oxides, nitrides, borides, carbides, chalcogenides, etc.
77.55.+f Dielectric thin films
- Subjects
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Condensed matter: electrical, magnetic and optical
- Dates
-
Issue 5 (May 2004)
Received 15 August 2003, in final form 25 November 2003
Published 29 January 2004
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Ferroelectric catastrophe: beyond nanometre-scale optical resolution
Junji Tominaga et al 2004 Nanotechnology 15 411
-
Numerical estimation of the curvature of a light wavefront in a weak gravitational field
A San Miguel et al 2009 Class. Quantum Grav. 26 235004
-
An alternative view on quasicrystalline random tilings
Christoph Richard 1999 J. Phys. A: Math. Gen. 32 8823
-
All spacetimes with vanishing curvature invariants
V Pravda et al 2002 Class. Quantum Grav. 19 6213
-
Scale-invariance in gravity and implications for the cosmological constant
Bryan Kelleher 2004 Class. Quantum Grav. 21 2623
-
Random tilings: concepts and examples
C Richard et al 1998 J. Phys. A: Math. Gen. 31 6385
-
Quasi-local angular momentum of non-symmetric isolated and dynamical horizons from the conformal decomposition of the metric
Mikołaj Korzyński 2007 Class. Quantum Grav. 24 5935
-
Electronic anisotropy, magnetic field-temperature phase diagram and their dependence on resistivity in c-axis oriented MgB2 thin films
S Patnaik et al 2001 Supercond. Sci. Technol. 14 315
-
Derivation and improvements of the quantum canonical ensemble from a regularized microcanonical ensemble
Jani Lukkarinen 1999 J. Phys. A: Math. Gen. 32 287
-
Perturbations of Friedmann-Robertson-Walker cosmological models
J M Stewart 1990 Class. Quantum Grav. 7 1169
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