Rohit Prativadi Prasankumar

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Center for Integrated Nanotechnologies

Rohit Prasankumar
Thrust Co-Leader, CINT, MPA-CINT
Email
(505) 284-7966

Expertise

Ultrafast dynamics and phenomena in complex quantum materials from terahertz to x-ray frequencies, including:

Complex oxides and oxide heterostructures (e.g., superconductors, manganites, and multiferroics)
Heavy fermion materials
Semiconductor nanostructures (particularly nanowires and quantum dots)
Two-dimensional nanosystems (e.g., graphene, topological insulators, and transition metal dichalcogenides)
Metamaterials and plasmonic devices
Organic and photovoltaic materials

Google Scholar

Education

Ph.D., Electrical Engineering
Massachusetts Institute of Technology
2003

M. S., Electrical Engineering
Massachusetts Institute of Technology
1999

B. S., Electrical Engineering
University of Texas at Austin
1997 (graduated magna cum laude)

Positions

2/2006 - Present | Technical Staff Member, Laboratory for Ultrafast Materials and Optical Science (LUMOS), Center for Integrated Nanotechnologies (CINT)
6/2009 - 3/2010 | Acting Partner Scientific Leader, Nanophotonics Thrust, Center for Integrated Nanotechnologies
8/2003 - 3/2006 | Postdoctoral Researcher, LUMOS, Center for Integrated Nanotechnologies

Awards

Ernest and Virginia Cockrell Scholarship, University of Texas at Austin (1993-1997)
National Merit Scholarship (1993-1997)
One of ~20 students nationwide selected to attend the Lawrence Livermore Undergraduate Summer Institute for Applied Science (1996)
NSF Graduate Fellowship, Honorable Mention (1997)
I2CAM Junior Travel Award to attend Gordon Conference on Ultrafast Techniques (2008)

Professional Societies

American Physical Society
Optical Society of America
Society of Photo-Optical Instrumentation Engineers
Materials Research Society

Publications

P. Bowlan, S. A. Trugman, D. A. Yarotski, A. J. Taylor, and R. P. Prasankumar, “Using ultrashort terahertz pulses to directly probe spin dynamics in insulating antiferromagnets,” J. Phys. D 51, 194003 (2018) (invited article).
M. Dutta, K. Natarajan, S. Betal, R. P. Prasankumar, A. S. Bhalla and R. Guo, “Dynamically tunable and magnetic-field direction defined amplitude/phase mode selective THz wave modulation by core-shell magnetoelectric nanocomposites,” Nanoscale 9, 13052 (2017).
B. Xu, Y. M. Dai, L. X. Zhao, K. Wang, R. Yang, W. Zhang, J. Y. Liu, H. Xiao, G. F. Chen, S. A. Trugman, J.-X. Zhu, A. J. Taylor, D. A. Yarotski, R. P. Prasankumar, and X. G. Qiu, “Temperature-tunable coupling between Weyl fermions and phonons in the Weyl semimetal TaAs,” Nature Communications 8, 14933 (2017).
P. Bowlan, J. Bowlan, S. A. Trugman, R. Valdes-Aguilar, J. Qi, X. Liu, J. K. Furdyna, M. Dobrowolska, A. J. Taylor, D. A. Yarotski, and R. P. Prasankumar, “Probing and controlling terahertz-driven structural dynamics with surface sensitivity,” Optica 4, 383 (2017).
B. Xu, Y. M. Dai, L. X. Zhao, K. Wang, R. Yang, W. Zhang, J. Y. Liu, H. Xiao, G. F. Chen, A. J. Taylor, D. A. Yarotski, R. P. Prasankumar, and X. G. Qiu, “Optical signatures of Weyl points in TaAs,” Phys. Rev. B (Rapid Comm.) 93, 121110(R) (2016).
P. Bowlan, S. A. Trugman, J. Bowlan, J.-X. Zhu, N. J. Hur, A. J. Taylor, D. A. Yarotski, and R. P. Prasankumar, “Probing ultrafast spin dynamics in the antiferromagnetic multiferroic HoMnO3 through a magnon resonance,” Phys. Rev. B (Rapid Comm.) 94, 100400(R) (2016).
Y. Dai, J. Bowlan, H. Li, H. Miao, Y. G. Shi, S. A. Trugman. J.-X. Zhu, H. Ding, A. J. Taylor, D. A. Yarotski, and R. P. Prasankumar, “Ultrafast carrier dynamics in the large magnetoresistance material WTe2,” Phys. Rev. B (Rapid Comm.) 92, 161104(R) (2015).
N. Kamaraju, W. Pan, U. Ekenberg, D. M. Gvozdic, S. Boubanga-Tombet, P. C. Upadhya, J. Reno, A. J. Taylor, and R. P. Prasankumar, “Terahertz magneto-optical spectroscopy of a two-dimensional hole gas,” Appl. Phys. Lett. 106, 031902 (2015).
Y.-M. Sheu, S. A. Trugman, L. Yan, Q. X. Jia, A. J. Taylor, and R. P. Prasankumar, “Ultrafast all-optical manipulation of interfacial-magnetoelectric coupling,” Nature Communications 5, 5832 (2014).
K. Appavoo, N. F. Brady, B. Wang, M. A. Seo, J. Nag, R. P. Prasankumar, S. T. Pantelides, D. J. Hilton, and R. F. Haglund, Jr., “Ultrafast phase transition via catastrophic phonon collapse driven by plasmonic electron injection,” Nano Lett. 14, 1127 (2014).

Full list of publications

Google Scholar

Books and Book Chapters

“Using Ultrafast Optical Spectroscopy to Unravel the Properties of Correlated Electron Materials,” R. P. Prasankumar, D. A. Yarotski, and A. J. Taylor, in Encyclopedia of Modern Optics II, Volume 2, p. 123-149 (2018).
"Optical Techniques for Materials Characterization,” edited by R. P. Prasankumar and A. J. Taylor, Taylor & Francis (2011).
"Emerging Optical Techniques for Characterizing Complex Materials," R. P. Prasankumar and A. J. Taylor, in Optical Techniques for Materials Characterization, Taylor & Francis (2011).

Selected Recent Invited Presentations

"Using ultrashort light pulses to probe and control quasiparticle dynamics in topological materials," APS March Meeting (2018).
“Using ultrafast terahertz spectroscopy to study low energy excitations in quantum materials,” SPIE Optics and Photonics (2017).
“Ultrafast carrier capture and recombination in single III-nitride nanowires,” SPIE Optics and Photonics (2017).
“Using ultrashort light pulses to probe and control dynamics in multiferroics,” International Meeting on Ferroelectricity (2017).
“Using ultrashort optical pulses to unravel the interplay between electronic and magnetic phenomena in heavy fermion and multiferroic materials,” International Conference on Strongly Correlated Electron Systems, (2017).
“Using ultrafast terahertz spectroscopy to study low energy excitations in quantum materials,” MRS Spring Meeting (2017).

Primary Lab Capabilities

CINT

Rohit Prasankumar

Expertise

Education

Positions

Awards

Professional Societies

Publications

Full list of publications

Books and Book Chapters

Selected Recent Invited Presentations

Primary Lab Capabilities

Additional Lab Capabilities