Biomolecules and nanostructures
The Optical Sciences group studies the interaction of light and matter at the nanoscale.
We do this by exploring ways to shape light and its environment. It's what we call
active and passive control. Our current focus is on the interaction of light with
biomolecules and nanostructures. We are part of Twente
University's Department of Science and Technology and member of the
Compact high-resolution spectral phase shaper(full pdf)
S. Postma, P. van der Walle, H.L. Offerhaus, and N.F. van Hulst
Review of scientific instruments
vol. 76, issue 12, p. 123105 (4 pages) dec 14 2005
The design and operation of a high-resolution spectral phase shaper with a footprint of only 7*10cm2 is presented. The liquid-c-ystal modulator has 4096 elements. More than 600 independent degrees of freedom can be positioned with a relative accuracy of 1 pixel. The spectral shaping of pulses from a broadband Ti:sapphire laser is verified by a hybrid cross-frequency-resolved optical gating/Grenouille measurement and intensity autocorrelation. We demonstrate the ability to split one pulse into two or more pulses with a programmable delay of more than 8.5 ps. To our knowledge this represents the most compact high resolution device in liquid-crystal modulator-based shaping to this date. © 2005 American Institute of Physics.