Towards Atomic-Scale Optical Probes

Date: 
Monday, May 24, 2010 (All day)
Speaker: 
Dr. Jeffrey Guest

Over the past two decades, ultra-high vacuum (UHV) scanning tunneling microscopy (STM) and single particle laser spectroscopy have made great strides in measuring and controlling nanoscale and atomic-scale systems incomplementary ways. While UHV STM and associated surface preparation techniques have demonstrated atomic-scale control over nanoscale structures and the ability to modify and measure their associated electronic and magnetic properties, laser spectroscopy techniques have been used to study (and manipulate) energy transfer and quantum coherence on fast time scales and with ultrahigh spectral resolution in nanoscale systems. I will describe our plans for and progress towards developing an experimental platform to combine these capabilities. I will also discuss recent spin-polarized STM measurements on nanoscale anti-ferromagnetic systems, nanoscale bandgap engineering in graphene, and surprising long range order in the surface termination of fractured strontium titanate. I will also describe recent efforts to perform interferometric dynamics measurements on a variety of nanomechanical systems, including top-down nanofabricated systems such as Si MEMS and bottom-up self-assembled structures such as nanocrystalline membranes.