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We demonstrate optomechanically induced amplification of carbon nanotube (CNT) mechanical modes using optical microcavities. We also show direct imaging of the spatial profile of CNT mechanical modes using optical readout.

We demonstrate large optomechanical coupling between a carbon nanotube and an optical microresonator. We measured a dominantly dissipative optomechanical coupling coefficient of gk = 1 MHz/nm

We present experimental and theoretical results of confined plasmons in graphene micro- and nano-structures. We present a FDTD technique to accurately model the measured data and demonstrate the importance of interactions between plasmonic structures.

We study graphene/dielectric interfaces using THz imaging and spectroscopy. Non-contacting, non-destructive THz probing reveals the local sheet conductivity of single-layer graphene deposited on a Si substrate and covered by a thin PMMA layer.

We demonstrate experimentally the synchronization of two micromechanical oscillators actuated by the optical radiation field. The mutual coupling is purely optical and fully tunable. Upon synchronization, the phase noise drops in agreement with the prediction.

THz imaging and spectroscopy using broadband THz pulses map out the THz carrier dynamics of large-area single-layer graphene. Non-contacting, non-destructive THz probing reveals the local sheet conductivity of the graphene samples.

We describe the first terahertz electrical measurements of single-walled carbon nanotube transistors. A picosecond ballistic electron resonance is directly observed in the time-domain. These results demonstrate a powerful new tool for directly probing picosecond electron motion in nanostructures.

Recently, considerable theoretical and experimental effort has been directed towards understanding the frequency-dependent response functions of mesoscopic structures. This work bears directly on controversial issues such as the tunneling time through a barrier [1], and the complex admittance of mesoscopic systems [2]. At terahertz frequencies the admittance is predicted to crossover to a frequency-dependent regime.