Thu, Mar 23, 2017, 1:00pm
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...
Thu, Mar 30, 2017, 1:00pm
An atomistic electrodynamics model, where the NPs in terms of a macroscopic homogenous dielectric constant is replaced by an atomic representation with dielectric properties depending on the local chemical environment, successfully describes the plasmonics behavior in quantum size region. By using this model, we explored the near field fluctuation...
Thu, Apr 13, 2017, 1:00pm
Coupling femtosecond pulses to the scanning tunneling microscope (STM) has the potential to combine unprecedented spatial and temporal resolution. Although much progress has been made, there are significant challenges that lie ahead. In this talk, I will highlight our efforts in studying the interactions between laser pulses and single molecules...
Thu, May 04, 2017, 1:00pm
Prof Julie Biteen
Based on sensitively detecting one fluorescent dye at a time, single-molecule fluorescence imaging gives nanometer-scale resolution to benchtop optical microscopes, enabling in situ and in vivo super-resolution microscopy. Still, the resolution of single-molecule fluorescence imaging is limited by the brightness of fluorescent probes. To...