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Biography

Dr. Nardeep Kumar

University of Puerto Rico, USA

Postdoctoral researcher


Email: nardeep.kumar@upr.edu


Qualifications

2014, Ph.D., Physics, The University of Kansas, Lawrence, KS, USA

2006, M.S., Physics, Punjabi University, Patiala, Punjab, India

2004, B.S., Physics, Chemistry, Mathematics, Panjab University, Chandigarh, Punjab, India


Research Fields

Physics, Optics

Graphene, Transition metal dichalcogenides, VO2

Ultrafast spectroscopy


Publications (selected)

  1. KUMAR, N., RUZICKA, B. A., BUTCH, N. P., SYERS, P., KIRSHENBAUM, K., PAGLIONE, J. and ZHAO, H., 2011, Spatially resolved femtosecond pump-probe study of topological insulator Bi2Se3. Physical Review B - Condensed Matter and Materials Physics. 2011. Vol. 83, no. 23, p. 1–8. DOI 10.1103/PhysRevB.83.235306.
  2. KUMAR, N., HE, J., HE, D., WANG, Y. and ZHAO, H., 2013, Charge carrier dynamics in bulk MoS2 crystal studied by transient absorption microscopy. Journal of Applied Physics. 2013. Vol. 113, no. 13. DOI 10.1063/1.4799110.
  3. KUMAR, N., KUMAR, J., GERSTENKORN, C., WANG, R., CHIU, H. Y., SMIRL, A. L. and ZHAO, H., 2013, Third harmonic generation in graphene and few-layer graphite films. Physical Review B - Condensed Matter and Materials Physics. 2013. Vol. 87, no. 12, p. 1–5. DOI 10.1103/PhysRevB.87.121406.
  4. KUMAR, N., NAJMAEI, S., CUI, Q., CEBALLOS, F., AJAYAN, P. M., LOU, J. and ZHAO, H., 2013, Second harmonic microscopy of monolayer MoS2. Physical Review B - Condensed Matter and Materials Physics. 2013. Vol. 87, no. 16, p. 1–6. DOI 10.1103/PhysRevB.87.161403.
  5. KUMAR, N., CUI, Q., CEBALLOS, F., HE, D., WANG, Y. and ZHAO, H., 2014, Exciton diffusion in monolayer and bulk MoSe2. Nanoscale [online]. 2014. Vol. 6, no. 9, p. 4915–9. DOI 10.1039/c3nr06863c.
  6. KUMAR, N., CUI, Q., CEBALLOS, F., HE, D., WANG, Y. and ZHAO, H., 2014, Exciton-exciton annihilation in MoSe2 monolayers. Physical Review B - Condensed Matter and Materials Physics. 2014. Vol. 89, no. 12, p. 1–6. DOI 10.1103/PhysRevB.89.125427.
  7. KUMAR, N., HE, J., HE, D., WANG, Y. and ZHAO, H., 2014, Valley and spin dynamics in MoSe2 two-dimensional crystals. Nanoscale [online]. 2014. Vol. 6, no. 21, p. 12690–5. DOI 10.1039/c4nr03607g.
  8. HE, J., KUMAR, N., BELLUS, M. Z., CHIU, H. Y., HE, D., WANG, Y. and ZHAO, H., 2014, Electron transfer and coupling in graphene-tungsten disulfide van der Waals heterostructures. Nature communications [online]. 2014. Vol. 5, p. 5622. DOI 10.1038/ncomms6622.
  9. HE, K., KUMAR, N., ZHAO, L., WANG, Z., MAK, K. F., ZHAO, H. and SHAN, J., 2014, Tightly bound excitons in monolayer WSe2. Physical Review Letters. 2014. Vol. 113, no. 2, p. 1–5. DOI 10.1103/PhysRevLett.113.026803.
  10. CUI, Q., CEBALLOS, F., KUMAR, N. and ZHAO, H., 2014, Transient absorption microscopy of monolayer and bulk WSe2. ACS Nano. 2014. Vol. 8, no. 3, p. 2970–2976. DOI 10.1021/nn500277y.
  11. WANG, R., CHIEN, H. C., KUMAR, J., KUMAR, N., CHIU, H. Y. and ZHAO, H., 2014, Third-Harmonic Generation in Ultrathin Films of MoS2. ACS Appl. Mater. Interfaces. 2014. Vol. 6, no.1, p. 314–318. DOI: 10.1021/am4042542.
  12. ROCHFORD, C., KUMAR, N., LIU, J., ZHAO, H. and WU, J., 2013, All-optical technique to correlate defect structure and carrier transport in transferred graphene films. ACS Applied Materials and Interfaces. 2013. Vol. 5, no. 15, p. 7176–7180. DOI 10.1021/am401518y.
  13. GONG, M., KIRKEMINDE, A., KUMAR, N., ZHAO, H. and REN, S., 2013, Ionic-passivated FeS2 photocapacitors for energy conversion and storage. Chemical communications (Cambridge, England) [online]. 2013. Vol. 49, no. 81, p. 9260–2. DOI 10.1039/c3cc45088k.
  14. WANG, Rui, RUZICKA, B. A., KUMAR, N., BELLUS, M. Z., CHIU, H. Y. and ZHAO, H., 2012, Ultrafast and spatially resolved studies of charge carriers in atomically thin molybdenum disulfide. Physical Review B - Condensed Matter and Materials Physics. 2012. Vol. 86, no. 4, p. 1–5. DOI 10.1103/PhysRevB.86.045406.
  15. RUZICKA, B. A., KUMAR, N., WANG, S., PING, L., K. and ZHAO, H., 2011, Two-probe study of hot carriers in reduced graphene oxide. Journal of Applied Physics. 2011. Vol. 109, no. 8, p. 1–4. DOI 10.1063/1.3573674.