Optical Sciences

Biomolecules and nanostructures

The Optical Sciences group studies the interaction of light and matter. Our current focus is on detection and sensing/imaging with an emphasis on the development of integrated photonics. We are part of Twente University's Department of Science and Technology and member of the MESA+ institute.

 

A DETAILED ANALYSIS OF THE OPTICAL BEAM DEFLECTION TECHNIQUE FOR USE IN ATOMIC FORCE MICROSCOPY

(full pdf)

PUTMAN CAJ, DEGROOTH BG, VANHULST NF, GREVE J
JOURNAL OF APPLIED PHYSICS
vol 72 issue 1: p6-p12 JUL 1 1992

A Michelson interferometer and an optical beam deflection configuration (both shot noise and diffraction limited) are compared for application in an atomic force microscope. The comparison shows that the optical beam deflection method and the interferometer have essentially the same sensitivity. This remarkable result is explained by indicating the physical equivalence of both methods. Furthermore, various configurations using optical beam deflection are discussed. All the setups are capable of detecting the cantilever displacements with atomic resolution in a 10 kHz bandwidth.
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