Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Extinction Near-Field Optical Microscopy



H F. Hamann, M Larbadi, S Barzen, T Brown, Alan Gallagher, David Nesbitt


Two AFM-assisted, apertureless, optical-imaging methods are presented. These overcome the severe resolution consrtaints of aperture-based Near-field Scanning Optical Microscopy by probing the highly localized mutual near-field interaction between AFM-tip and sample. Specifically, we monitor the evanescent field scattering and the extinction of the reflected intensity while the tip is scanned over Au-nanoparticles. We describe a significant improvement in optically detected spatial resolution (approximately equal to} 2 nm to 3 nm) and introduce a new, more quantitative method for optical imaging.
Optics Communications
No. 1-3


AFM, extinction, nanoparticles, NSOM, resolution, scattering


Hamann, H. , Larbadi, M. , Barzen, S. , Brown, T. , Gallagher, A. and Nesbitt, D. (2003), Extinction Near-Field Optical Microscopy, Optics Communications (Accessed December 9, 2023)
Created October 31, 2003, Updated October 12, 2021