Positions

Overview

  • Dr. Appavoo joined UAB Physics as an Assistant Professor in 2016. He received his bachelor’s degrees in Physics and Mathematics at Berea College in 2008 and his PhD at Vanderbilt University in 2012. His dissertation research focused on the ultrafast dynamics of phase-change nanophotonics for sensing and optoelectronics applications. Dr. Appavoo was a Goldhaber Fellow at the Brookhaven National Laboratory in 2013, developing novel in situ optical techniques to probe ultrafast dynamics of energy nanomaterials. Currently, Dr. Appavoo is an NSF EPSCoR RII Track-4 Research Fellow, a recipient of the Ralph Powe Junior Faculty Award and manages a NASA EPSCOR/Alabama: Research Infrastructure Development grant.
  • Selected Publications

    Academic Article

    Year Title Altmetric
    2018 Epitaxial VO2 Nanostructures: A Route to Large-Scale, Switchable Dielectric MetasurfacesACS Photonics.  5:2561-2567. 2018
    2017 Ultrafast optical snapshots of hybrid perovskites reveal the origin of multiband electronic transitionsPhysical Review B.  96. 2017
    2017 Unravelling Photocarrier Dynamics beyond the Space Charge Region for Photoelectrochemical Water SplittingChemistry of Materials.  29:4036-4043. 2017
    2017 Extremely efficient internal exciton dissociation through edge states in layered 2D perovskitesScience.  355:1288-1292. 2017
    2016 Exciton Correlations in Intramolecular Singlet FissionJournal of the American Chemical Society.  138:7289-7297. 2016
    2016 Polaron stabilization by cooperative lattice distortion and cation rotations in hybrid perovskite materials 2016
    2016 Light-activated photocurrent degradation and self-healing in perovskite solar cellsNature Communications.  7. 2016
    2016 Excitonic Lasing in Solution-Processed Subwavelength Nanosphere Assemblies 2016
    2016 Heterogeneous nucleation and growth dynamics in the light-induced phase transition in vanadium dioxideJournal of Physics: Condensed Matter.  28. 2016
    2015 Optically-Triggered Nanoscale Memory Effect in a Hybrid Plasmonic-Phase Changing NanostructureACS Photonics.  2:1306-1313. 2015
    2015 Structural patterns at all scales in a nonmetallic chiral Au133(SR)52 nanoparticleScience Advances.  1. 2015
    2015 Quantifying bulk and surface recombination processes in nanostructured water splitting photocatalysts via in situ ultrafast spectroscopy 2015
    2015 Hybrid Si-VO2-Au optical modulator based on near-field plasmonic couplingOptics Express.  23:6878-6887. 2015
    2014 Polarization selective phase-change nanomodulatorScientific Reports.  4. 2014
    2014 Role of size and defects in ultrafast broadband emission dynamics of ZnO nanostructuresApplied Physics Letters.  104. 2014
    2014 Ultrafast phase transition via catastrophic phonon collapse driven by plasmonic hot-electron injection 2014
    2014 Enhanced broadband ultrafast detection of ultraviolet emission using optical Kerr gatingReview of Scientific Instruments.  85. 2014
    2013 Switchable plasmon-induced transparency in gold nanoarrays on vanadium dioxide film 2013
    2013 Electron-beam deposition of vanadium dioxide thin filmsApplied Physics A: Materials Science and Processing.  111:975-981. 2013
    2013 Tracking the evolution of electronic and structural properties of VO 2 during the ultrafast photoinduced insulator-metal transitionPhysical review B: Condensed matter and materials physics.  87. 2013
    2012 Revealing plasmonic Gap modes in particle-on-film systems using dark-field spectroscopyACS Nano.  6:1380-1386. 2012
    2012 Role of defects in the phase transition of VO 2 nanoparticles probed by plasmon resonance spectroscopy 2012
    2012 Ultrafast changes in lattice symmetry probed by coherent phononsNature Communications.  3. 2012
    2011 Detecting nanoscale size dependence in VO2 phase transition using a split-ring resonator metamaterial 2011
    2010 Single-particle plasmon resonance spectroscopy of phase transition in vanadium dioxideOptics Letters.  35:3988-3990. 2010

    Research Overview

  • Designing, fabricating and characterizing electronic nanomaterials for targeted technologies in energy and optoelectronics are recurring themes of Dr. Appavoo's scientific interests. Currently, his research group:

    - Combine conventional thin-film fabrication with novel nanostructuring techniques to make hybrid nanoscale systems with emerging physical phenomena.

    - Develop in situ femtosecond laser spectroscopy to dynamically probe how microscopic processes in nanostructures are modified with changes in shape, size and crystal structure.

    Recent material systems include hybrid organic-inorganic perovskites, arrays of lithographically-prepared metallic and dielectric nanostructures (metamaterials), and large-area fabrication of nanospheres and nanowires for lasing. At different times, Dr. Appavoo has performed research to: (i) integrate phase change material vanadium dioxide (VO2) with metamaterials for ultrafast nanophotonics; (ii) develop ultrafast laser in situ spectroscopy of water-splitting photocatalysts in operating photoelectrochemical (PEC) cells; (iii) create plasmonic elements for autocatalytic sensors; and (iv) test performance of chalcogenide phase-change non-volatile memory elements.
  • Teaching Overview

  • Dr. Appavoo has taught several undergraduate and graduate courses in Physics, such as University Physics (Honors) and Quantum Mechanics. He has actively developed new courses, including "Nanophotonics" and "Quantum Optics and Information Science." In 2019, Dr. Appavoo received the Presidential Award for Excellence in Teaching.
  • Teaching Activities

  • PH798 - Non-Dissertation Research (Summer Term 2020) 2020
  • PH221 - General Physics I (Spring Term 2020) 2020
  • PH221R - General Physics I - Recitation (Spring Term 2020) 2020
  • PH451 - Intro Quantum Mechanics II (Spring Term 2020) 2020
  • PH551 - Intro to Quantum Mechanics II (Spring Term 2020) 2020
  • PH798 - Non-Dissertation Research (Spring Term 2020) 2020
  • PH222 - General Physics II (Fall Term 2019) 2019
  • PH222R - General Physics II Recitation (Fall Term 2019) 2019
  • PH497 - Special Topics in Physics (Fall Term 2019) 2019
  • PH793 - Scientific Communications I (Fall Term 2019) 2019
  • PH798 - Non-Dissertation Research (Fall Term 2019) 2019
  • PH798 - Non-Dissertation Research (Summer Term 2019) 2019
  • PH451 - Intro Quantum Mechanics II (Spring Term 2019) 2019
  • PH551 - Intro to Quantum Mechanics II (Spring Term 2019) 2019
  • PH798 - Non-Dissertation Research (Spring Term 2019) 2019
  • PH222 - General Physics II (Fall Term 2018) 2018
  • PH222R - General Physics II Recitation (Fall Term 2018) 2018
  • PH793 - Scientific Communications I (Fall Term 2018) 2018
  • PH798 - Non-Dissertation Research (Fall Term 2018) 2018
  • PH798 - Non-Dissertation Research (Summer Term 2018) 2018
  • PH451 - Intro Quantum Mechanics II (Spring Term 2018) 2018
  • PH551 - Intro to Quantum Mechanics II (Spring Term 2018) 2018
  • PH794 - Scientific Communications II (Spring Term 2018) 2018
  • PH798 - Non-Dissertation Research (Spring Term 2018) 2018
  • PH201 - College Physics I (Fall Term 2017) 2017
  • PH201R - College Physics I - Recitation (Fall Term 2017) 2017
  • PH201R - College Physics I - Recitation (Fall Term 2017) 2017
  • PH201R - College Physics I - Recitation (Fall Term 2017) 2017
  • PH201R - College Physics I - Recitation (Fall Term 2017) 2017
  • PH798 - Non-Dissertation Research (Fall Term 2017) 2017
  • PH798 - Non-Dissertation Research (Summer Term 2017) 2017
  • PH451 - Intro Quantum Mechanics II (Spring Term 2017) 2017
  • PH491 - Advanced Physics Lab I (Spring Term 2017) 2017
  • PH551 - Intro to Quantum Mechanics II (Spring Term 2017) 2017
  • PH798 - Non-Dissertation Research (Spring Term 2017) 2017
  • PH450 - Intro Quantum Mechanics I (Fall Term 2016) 2016
  • PH550 - Intro to Quantum Mechanics I (Fall Term 2016) 2016
  • Education And Training

  • Doctor of Philosophy in Physics, Vanderbilt University 2012
  • Full Name

  • Kannatassen Appavoo