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Near-field optical data storage using C-apertures

Authors :
Lambertus Hesselink
Yao-Te Cheng
A. Gibby
Paul Hansen
J. Brian Leen
Source :
Applied Physics Letters. 97:073111
Publication Year :
2010
Publisher :
AIP Publishing, 2010.

Abstract

We demonstrate the all-optical recording of deeply subwavelength data bits in Ge2Sb2Te5 using a near-field scanning optical microscope (NSOM) probe that utilizes a C-aperture fabricated using through membrane focused ion beam milling. Data bits recorded with various optical powers were read out optically by C-aperture NSOM and the physical bit size was measured by atomic force microscopy (AFM). Both optical and AFM measurements were found to be in excellent agreement with simulation. We achieved a minimum physical bit size of 53.5×50.2 nm2 at a wavelength of 980 nm (λ/20) indicating a data density of 223 Gbit/in.2.

Details

ISSN :
10773118 and 00036951
Volume :
97
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi...........6b914256acc63ae5d78b81f4724fc155
Full Text :
https://doi.org/10.1063/1.3474801