λ/26 silver nanodots fabricated by direct laser writing through highly sensitive two-photon photoreduction

Journal Article · Mon Nov 18 00:00:00 EST 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4830221· OSTI ID:22254035

Cao, Yaoyu; Gu, Min ^[1]

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1. Centre for Micro-Photonics and CUDOS, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, P.O. Box 218, Hawthorn, Victoria 3122 (Australia)

We demonstrated an approach to break the diffraction limit and realise deep-subwavelength two-photon direct laser writing by employing a highly sensitive photoreduction process. The photoreduction photosensitivity increased by at least 4 times while the wavelength of the fabrication laser beam was tuned from 800 nm to 580 nm. The increase of the photosensitivity resulted in improved resolution for the silver dot fabrication. By developing the photoreduction material with adding electron donors, the photosensitivity further increased and enabled the realisation of a single silver dot at 22 nm which is λ/26 for the wavelength of the fabrication laser beam.

• OSTI ID: 22254035
• Journal Information: Applied Physics Letters, Vol. 103, Issue 21; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
BEAMS
BINDING ENERGY
DIFFRACTION
ELECTRONS
FABRICATION
LASERS
PHOTONS
PHOTOSENSITIVITY
QUANTUM DOTS
RESOLUTION
SILVER
WAVELENGTHS