Share Email Print

Proceedings Paper

Near-field single photon detection in a scattering SNOM
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

A conical tip made out of good conductive metal can be used to efficiently localize the optical field at the apex of the tip. For a tip of finite length both a field singularity (lightning rod effect) and a surface plasmon resonance contribute to the E-field enhancement. A strongly absorbing superconducting nanodetector placed in the optical near-field of the tip shows enhanced optical absorption. The design of an optimal tip- detector system is non-trivial because the strong damping by the detector shifts the resonance wavelength of the tip and significantly lowers the quality factor of the resonance. We compare calculations of the field enhancement of a bare tip to the absorption enhancement in the detector in the presence of the tip as a function of tip length, apex radius and semi-angle of the cone. The resonance of a 225 nm long gold tip in the presence of a detector occurs at ̴1000 nm and is red-shifted by 150 nm compared to the resonance of a bare tip.

Paper Details

Date Published: 6 May 2015
PDF: 6 pages
Proc. SPIE 9504, Photon Counting Applications 2015, 950403 (6 May 2015); doi: 10.1117/12.2178902
Show Author Affiliations
Qiang Wang, Leiden Univ. (Netherlands)
Michiel J. A. de Dood, Leiden Univ. (Netherlands)

Published in SPIE Proceedings Vol. 9504:
Photon Counting Applications 2015
Ivan Prochazka; Roman Sobolewski; Ralph B. James, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?