Event Details

Optics News

Imaging Localized Electric Fields With Nanometer Precision Through Tip-Enhanced Raman Scattering

Speaker: Jizhou Wang

Metallic nanostructures may be used to confine electromagnetic fields, and hence to access spatial resolutions far beyond the diffraction limit in optical spectroscopy, like tip enhanced Raman spectroscopy (TERS). Spatial resolutions on the order of a few nanometers are amenable to scanning tunneling microscopy (STM) and atomic force microscopy (AFM)-based TERS measurements. Nanometric precision in TERS have been achieved, but largely relied on extreme conditions of temperature and pressure (ultralow temperatures in ultrahigh vacuum chambers). Recently, a team from Physical Sciences Division, Pacific Northwest National Laboratory demonstrates sub-nm spatial resolution in AFM-based TERS imaging under ambient conditions.

Main Talk

Wavefront Shaped Laser Beams: From Coherent Raman Generation, Towards Single Molecule Detection

Speaker: Mariia Shutova

Mariia will present our recent experiments on different aspects of transverse wavefront shaping of laser beams. She will focus on how we can achieve detection the left/right-handeness (chirality) of a single molecule with wavefront shaped light.