Home Events Online Colloquium: “Designer defects: engineering color centers in crystals as nanoscale optical sensors” — October 1, 2020 at 4 PM

Online Colloquium: “Designer defects: engineering color centers in crystals as nanoscale optical sensors” — October 1, 2020 at 4 PM

Dr. Claire Allison McLellan
Wu Tsai Postdoctoral Scholar, Dionne Laboratory
Stanford University, Stanford, California
Wake Forest University Alum
Thursday, October 1, 2020 at 4:00 PM
Via Video Conference (contact wfuphys@wfu.edu for link information)

ABSTRACT

Nanoscale science spans many different disciplines, from the interaction between cells to writing a bit of magnetic memory. Understanding the forces that dictate nanoscale physics remains an outstanding challenge due to a lack of sensors that are themselves nanoscale and non-invasive. Remarkably, color centers, defects in crystals with optical absorption and emission lines, provide a way to map these interactions. If engineered correctly, color centers respond to external stimuli such as mechanical force, pressure, temperature, and magnetic field. In this talk, I will discuss two distinct color center sensing systems: the nitrogen-vacancy (NV) center in diamond for magnetic field imaging and rare-earth upconverting nanoparticles (UCNPs) for bio-mechanical force sensing. I will be discussing the materials science and optics studies used to optimize the sensitivity of these color centers as well as sensing applications, including measuring novel magnetic materials and mechanical forces from C. elegans digestive system.  Color center sensors open the door to imaging reactions and dynamics on the nanometer scale.

Dr. McLellan recommends the following published papers from her group  for topical information:
https://pubs.acs.org/doi/abs/10.1021/acscentsci.9b00300
https://pubs.acs.org/doi/abs/10.1021/acs.nanolett.5b05304

A review paper on this topic may also be of interest:
https://www.nature.com/articles/s41586-020-2048-8

 

Printable Version

Date

Oct 01 2020
Expired!

Time

4:00 pm - 5:00 pm
Category

Organizer

Oana Jurchescu
Email
jurchescu@wfu.edu