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Preparation of high energy throughput SNOM probes

P. Wrobel ; T. Stefaniuk ; Tomasz Antosiewicz (Institutionen för teknisk fysik, Kondenserade materiens teori) ; A. Libura ; G. Nowak ; T. Wejrzanowski ; M. Andrzejczuk ; K. Jedrzejewski ; T. Szoplik
13th International Conference on Transparent Optical Networks, ICTON 2011, Stockholm, 26-30 June 2011 (2162-7339). (2011)
[Konferensbidrag, refereegranskat]

In this technical note we present technological steps of fabrication of high energy throughput SNOM probes. The core-metal coating interface of probes is corrugated what enhances photon-to-plasmon coupling. A strong evanescent field allows for reduction of aperture diameter, which together with skin depth of metal used for coating decide upon resolution. Probes are made of Ge-doped silica glass fibre, which is hydrogenated to increase its photosensitivity. A Bragg grating is recorded in the cores with UV light diffracted into +1 st/1st diffraction orders on a sinusoidal phase mask. Modulation of the refractive index is connected with different etch rates. Etching with the Turner method is made in aqueous solution of HF acid. A corrugated tapered fibre is then coated with aluminium in a special rotating holder. We present results of this novel multi step technology.

Nyckelord: aperture metal-coated probes, Bragg grating, corrugated tapered probes, resolution, SNOM, Aperture diameter, Coating interfaces, Diffraction orders, Etch rates, Evanescent fields, Ge-doped silica, HF acid, High energy, Multi-step, Phase masks, Skin depth, Technical notes, Bragg gratings, Corrugated metal, Doping (additives), Fiber optic networks, Germanium, Glass fibers, High energy physics, Hydrofluoric acid, Metal coatings, Metals, Protective coatings, Refractive index, Silica, Transparent optical networks, Probes



Denna post skapades 2011-12-06. Senast ändrad 2017-09-14.
CPL Pubid: 149609

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kondenserade materiens teori (1900-2015)

Ämnesområden

Teknisk fysik

Chalmers infrastruktur