230 citations · 435 across the 12 of their papers we have counts for
12 papers
Terahertz magneto-optical spectroscopy of two-dimensional hole and electron systems
N. Kamaraju, W. Pan, U. Ekenberg +6
We have used terahertz (THz) magneto-optical spectroscopy to investigate the cyclotron resonance in high mobility two-dimensional electron and hole systems. Our experiments reveal…
Ultrafast Dynamics of Gold Nanorods: Tuning between Photo-Bleaching and Photo-Induced Absorption
M. Anija, Sunil Kumar, N. Kamaraju +3
We report ultrafast electron dynamics in gold nanorods investigated using 80 fs laser pulses centered at 1.57 eV. Five types of nanorod colloidal suspensions in water having their…
Temperature-dependent chirped coherent phonon dynamics in BiTe using high intensity femtosecond laser pulses
N. Kamaraju, Sunil Kumar, A. K. Sood
Degenerate pump-probe reflectivity experiments have been performed on a single crystal of bismuth telluride (BiTe) as a function of sample temperature (3K to 296K) and pump…
Large-amplitude chirped coherent phonons in tellurium mediated by ultrafast photoexcited carrier diffusion
N. Kamaraju, Sunil Kumar, M. Anija +1
We report femtosecond time-resolved reflectivity measurements of coherent phonons in tellurium performed over a wide range of temperatures (3K to 296K) and pump laser intensities.…
Direct observation of low frequency confined acoustic phonons in silver nanoparticles: Terahertz time domain spectroscopy
Sunil Kumar, N. Kamaraju, B. Karthikeyan +3
Terahertz time domain spectroscopy has been used to study low frequency confined acoustic phonons of silver nanoparticles embedded in poly(vinyl alcohol) matrix in the spectral ran…
Graphene analogue BCN: femtosecond nonlinear optical susceptibility and hot carrier dynamics
Sunil Kumar, N. Kamaraju, K. S. Vasu +3
Third-order nonlinear absorption and refraction coefficients of a few-layer boron carbon nitride (BCN) and reduced graphene oxide (RGO) suspensions have been measured at 3.2 eV in…