Colloquium Schedule

Colloquium: Thursday, April 20, 4:10 PM, Lewis Lab 316

Magneto-Optical and Ultrafast Optical Phenomena in Multi-functional Materials

Giti Khodaparast

Department of Physics
Virginia Tech University

Magneto-optical and time resolved spectroscopy are extremely powerful tools and have provided crucial information on matter, its properties, structure, and dynamics. The confinement of electrons in nanostructured materials or in a strong magnetic field can result in fascinating phenomena for quantum optics and condensed matter physics, in which electronic states can be designed and controlled. My group, using state-of-the-art spectroscopic techniques, studies magneto-optical and ultrafast optical phenomena in several important materials systems.  Ultrafast optical spectroscopy can provide insight into fundamental microscopic interactions, dynamics and the coupling of several degrees of freedom. In this talk examples in the area of ferromagnetic semiconductors and multiferroic materials, will be presented. Both static and dynamical material properties are being investigated from the macroscopic to microscopic nanoscale response, across multiple length and time scales combining time-resolved far-field and local probe spectroscopy. Specifically, we use ultrafast optical spectroscopy to gain insight into the microscopic interactions that determine the macroscopic material properties. Our studies will provide insight into the fundamental interactions among the many coupled degrees of freedom (electrons, holes, phonons, electronic and nuclear spin, etc.) in our systems [1,2].
[1] B. A. Magill, K-D Park, Y. Zhou, A. Chopra, Maurya, S. Priya, M. B. Raschke, A. Belyanin, C. J. Stanton, G. A. Khodaparast “Ultrafast Anisotropic Optical Response and Coherent Acoustic Phonon Generation in Polycrystalline BaTiO3-BiFeO3”, Energy Harvesting and Systems. Volume 3, Issue 3, Pages 229–236, April (2016).  [2] 21- M. Bhowmick, T. R. Merritt, and G. A. Khodaparast, Bruce W. Wessels Stephen A. McGill, D. Saha, X. Pan, G. D. Sanders, and C. J. Stanton, (2012) “Time-resolved differential transmission in MOVPE-grown ferromagnetic InMnAs” Phys. Rev. B 85, 125313 (2012).

Click Here for full announcement

Physics and Astronomy Colloquia are usually scheduled for Thursdays at 4:10 PM in Lewis Lab room 316. Refreshments and snacks are available in the nearby coffee room at 3:45 PM.


Physics Colloquium Schedule for SPRING 2017

Click on Title below for past or upcoming Announcements (where available), and Speaker name for website.        

January 26Daniel McCarronYale UniversityUltracold Polar Molecules: Production Methods and Scientific Applications
February 2Tariq RafiqLehigh UniversityRole of Plasma Science in Making a Sun on Earth
February 9Mehul MalikInstit for Quantum Optics and Quantum Info, ViennaHigh-Dimensional Quantum Photonics: Pushing the limits of Quantum Information Science
February 16Mayukh LahiriInstit for Quantum Optics and Quantum Info, ViennaImaging and Correlation Measurements with Undetected Photons
February 23Ariel SommerMITQuantum Simulation with Cold Atoms and Trapped Photons
March 2MJ PueschelUniv. of Wisconsin-MadisonTurbulence in Magnetized Plasmas: from Fusion Reactors to Astrophysics
March 7Jane PrattUniv of Exeter, UKMagnetic Reconnection in Fusion Plasmas
March 16Spring Break--
March 23Laura KaufmanColumbia Univ.
March 30Meenaskshi DuttRutgers Univ.
April 6Bradley PetersonOhio State Univ.Exploring the Inner Structure of Active Galactic Nuclei by Reverberation
April 13Mark Trodden Univ. of Penn.
April 20Giti KhodaparastVirginia Tech.Magneto-Optical and Ultrafast Optical Phenomena in Multi-functional Materials
April 27Ahijit MajumderWayne State Univ.Resolving the Quark Gluon Plasma with Higher Precision
May 4Marlan  ScullyTexas A&MEntropy: Classical and Quantum
May 11---
May 18---