216 citations · 1.1k across the 24 of their papers we have counts for
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Cryogenic Magneto-Terahertz Scanning Near-field Optical Microscope (cm-SNOM)
Richard H. J. Kim, Joong-Mok Park, Samuel J. Haeuser +2
We have developed a versatile near-field microscopy platform that can operate at high magnetic fields and below liquid-helium temperatures. We use this platform to demonstrate an e…
Ultrafast terahertz probes of interacting dark excitons in chirality-specific semiconducting single-walled carbon nanotubes
Liang Luo, Ioannis Chatzakis, Aaron Patz +1
Ultrafast terahertz spectroscopy accesses the {\em dark} excitonic ground state in resonantly-excited (6,5) SWNTs via internal, direct dipole-allowed transitions between lowest lyi…
Broadband terahertz generation from metamaterials
Liang Luo, Ioannis Chatzakis, Jigang Wang +4
The terahertz spectral regime, ranging from about 0.1 to 15 THz, is one of the least explored yet most technologically transformative spectral regions. One current challenge is to…
Post-transient relaxation in graphene after an intense laser pulse
Junhua Zhang, Tianqi Li, Jigang Wang +1
High intensity laser pulses were recently shown to induce a population inverted transient state in graphene [T. Li et al. Phys. Rev. Lett. 108, 167401 (2012)]. Using a combination…
Transient Charge and Energy Balance in Graphene Induced by Ultrafast Photoexcitation
Junhua Zhang, Joerg Schmalian, Tianqi Li +1
Ultrafast optical pump-probe spectroscopy measurement on monolayer graphene observes significant optical nonlinearities. We show that strongly photoexcited graphene monolayers with…
Ultrafast Spectroscopy of Mid-Infrared Internal Exciton Transitions of Separated Single-Walled Carbon Nanotubes
Jigang Wang, Matt W. Graham, Yingzhong Ma +2
We report a femtosecond mid-infrared study of the broadband low-energy response of individually separated (6,5) and (7,5) single-walled carbon nanotubes. Strong photoinduced absorp…