Sierra Williams
Sierra Williams (Prescher group) selected as a Decade Plus grad leadership coach.
Sean and Zi
Grads Sean Nguyen and Zi Yao (Prescher group) awarded BIOL Division Travel Award.

Time resolved imaging with vibrationally resonant sum frequency generation microscopy

Sudipta Mukherjee
Thu, Mar 23, 2017, 1:00pm
Nien-hui Ge
NS2 2201

Recently picosecond vibrationally resonant sum frequency generation (VRSFG) process has been adopted as a surface sensitive, chemically specific nonlinear imaging modality. In this talk, we will discuss our recent efforts to extend this technique to femtosecond regime. To this end, we have built a high powered mid infrared femtosecond optical parametric oscillator (OPO) tunable from 3-5 micron range. Use of femtosecond laser pulses exploits the broad bandwidth of mid infrared pulses to multiplex spectrum measurement and time resolve vibrational free induction decay to study dynamics. Experimental results of time resolved free induction decay, spectra and images of collagen-I will be presented.