OSC Colloquium: Professor John Schaibley

    Date: 
    Thursday, September 12, 2019 - 3:30pm - 5:00pm
    Location: 
    Meinel 307
    Address: 

    1630 E. University Blvd.

    3rd Floor Lobby area

    Registration: 

    Open to campus and public.

    Description: 

    Speaker: John Schaibley

    Topic: Interlayer Excitons and Nonlinear Plasmonics in 2D Material Heterostructures

    Host: Rolf Binder

    Visit our website for future lecture dates and speaker information: http://www.optics.arizona.edu/news-events/events/colloquium For a list of our archived lectures: http://www.optics.arizona.edu/news-events/events/colloquium/archive

    Abstract(s): 

    Atomically thin semiconductors, such as monolayer MoSe2 and WSe2, have emerged as exciting optoelectronic materials, with novel spin-valley electronic physics and excitons that are strongly bound at room temperature. It has recently been shown that these materials can form the basis for atomically thin p-n junctions, transistors, light emitting diodes, and low threshold nanolasers. In this presentation, I will discuss optoelectronics and spin effects in heterostructures of MoSe2 and WSe2, with type-II band alignment, with the lowest conduction band in the MoSe2 layer, and the highest valence band in the WSe2 layer. I will discuss recent results demonstrating the localization of interlayer excitons to moiré potential traps that arise due to the interaction between layers. I will also discuss the applications of 2D semiconductors to plasmonics. Specifically, I will show our results demonstrating optical frequency plasmonic modulation using a monolayer semiconductor integrated on top of a metallic waveguide. 

    Speaker Bio(s): 

    John Schaibley was born and grew up in Indianapolis, Indiana. He attended Purdue University, where he received B.S. degrees in physics and mathematics, graduating Phi Beta Kappa with highest distinction. He did his graduate work at the University of Michigan under the guidance of Professor Duncan Steel, where his Ph.D. research focused on solid state spin-photon interfaces and quantum optics with single InAs quantum dots. He did his postdoc at the University of Washington under Professor Xiaodong Xu, investigating fundamental light-matter interactions, device physics, and optical spin-valley effects in 2D materials and their heterostructures. His research group in the Department of Physics at the University of Arizona focuses on optical physics of 2D material heterostructures with an emphasis on nonlinear optical and quantum effects.

    Schedule: 

    Refreshments 3:30pm

    Lecture @ 3:45pm - 5pm