Terahertz (THz) waves are electromagnetic waves whose
frequencies lie between the microwave and infrared
regions. Naturally occurring THz radiation fills up the
space of everyday life providing warmth, yet this part of
the electromagnetic spectrum remains the least explored
region. Our research focuses on terahertz
time-domain spectroscopy and ultrafast carrier
dynamics in semiconductor nanostructures and carbon
nanomaterials.
Quantum
Dynamics of Excitions in QWs Driven by Strong THz
Pulses
Terahertz
Excitations of Semiconductor Microcavities
Unconventional
Terahertz Carrier Relaxation in
Graphene Oxide: Observation of
Enhanced Auger Recombination due to
Defect
Saturation J. Kim, J.
Oh, C. In, Yun-Shik Lee, T. B.
Norris, S. C. Jun, H. Choi
ACS nano 8, 2486 (2014). http://pubs.acs.org/doi/abs/10.1021/nn406066f
High-field terahertz response of graphene M. J. Paul, Y.-C. Chang, Z. J. Thompson, A. Stickel, J.
Wardini, H. Choi, E. D. Minot, T. B. Norris, and Yun-Shik
Lee
New J. Phys. 15, 085019 (2013) http://iopscience.iop.org/1367-2630/15/8/085019
Exciton dynamics in atomically thin MoS2:
Interexcitonic interaction and
broadening kinetics S. Sim, J. Park, J.-G. Song,
C. In, Yun-Shik Lee, H. Kim, and H. Choi
Phys. Rev. B 88, 075434 (2013) http://link.aps.org/doi/10.1103/PhysRevB.88.075434
Terahertz Imaging and Time-Domain Spectroscopy
of Single-Layer Graphene Embedded in
Dielectric Media M. J. Paul, J. L.
Tomaino, J. W. Kevek, T. DeBorde, Z. J. Thompson, E. D.
Minot, and Yun-Shik Lee
Appl. Phys. Lett. 101, 091109 (2012) http://dx.doi.org/10.1063/1.4749280 Terahertz-Driven
Three-Level L System in
Quantum-Well Microcavity
J. L. Tomaino, A. D.
Jameson, Yun-Shik Lee, G.
Khitrova, H. M. Gibbs, A. C.
Klettke, M. Kira, and S.W.
Koch
Phys. Rev. Lett. 108, 267402
(2012) http://link.aps.org/doi/10.1103/PhysRevLett.108.267402 Terahertz
transmission
ellipsometry of
vertically grown carbon
nanotubes
M. J. Paul, J. L.
Tomaino, A. D. Jameson, T. Scharf, E. D. Minot, N. Khuta,
V. Podolskiy, and Yun-Shik Lee
Appl. Phys. Lett. 101, 111107 (2012).
http://dx.doi.org/10.1063/1.4752158