Advanced Laser Spectroscopy
Spectroscopy is a powerful tool in probing electron bandstructure and wavefunctions, because optical transitions are sensitive to both density of states and electron wavefunctions. Through studying optical spectroscopy and optical transition selection rules, one can obtain information on both electronic bandstructure and electron wavefunctions. In contrast, other experimental methods, such as electrical transport measurement, scanning tunneling microscopy (STM) and angle-resolved photonelectron spectroscopy (ARPES), can only obtain information about bandstructure.
In addition, with its high sensitivity, spectral specificity and unparalleled time resolution, optical spectroscopy provides a non-contact tool for probing nanostructures. Some specific spectroscopic approaches are Fourier transform infrared spectroscopy (FTIR), Rayleigh, Raman and absorption spectroscopy, time-resolved pump-probe measurements, and THz and nonlinear spectroscopy. These techniques are particularly suitable for investigating low dimensional materials.
Spectroscopy is a powerful tool in probing electron bandstructure and wavefunctions, because optical transitions are sensitive to both density of states and electron wavefunctions. Through studying optical spectroscopy and optical transition selection rules, one can obtain information on both electronic bandstructure and electron wavefunctions. In contrast, other experimental methods, such as electrical transport measurement, scanning tunneling microscopy (STM) and angle-resolved photonelectron spectroscopy (ARPES), can only obtain information about bandstructure.
In addition, with its high sensitivity, spectral specificity and unparalleled time resolution, optical spectroscopy provides a non-contact tool for probing nanostructures. Some specific spectroscopic approaches are Fourier transform infrared spectroscopy (FTIR), Rayleigh, Raman and absorption spectroscopy, time-resolved pump-probe measurements, and THz and nonlinear spectroscopy. These techniques are particularly suitable for investigating low dimensional materials.
Related publications:
- Gate-dependent pseudospin mixing in graphene/boron nitride Moiré superlattice, Nature Physics, 10, 743 (2014).
- Observation of a large bandgap and Landau level renormalization, Nature Communication, 5, 5461 (2014).
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