Interface-Specific Two-Dimensional Electronic Sum Frequency Generation Spectroscopy
Gang-Hua Deng, Yuqin Qian, Qianshun Wei, Tong Zhang, Yi Rao
Abstract
-type GaAs (100). We found surface dark state within the bandgap of the GaAs in 2D-ESFG spectra, which could not be observed in one-dimensional ESFG spectra. To our best knowledge, this is a first demonstration of interface-specific two-dimensional electronic spectroscopy. The development of the 2D-ESFG spectroscopy will provide new structural probes of spectral diffusion, conformational dynamics, energy transfer, and charge transfer for surfaces and interfaces.
Topics & Concepts
Sum frequency generation spectroscopySpectroscopySum-frequency generationSpectral lineInterface (matter)Electron spectroscopyElectronic structureDiffusionPhase (matter)Materials scienceMolecular physicsChemistryOpticsPhysicsMoleculeCondensed matter physicsLaserNonlinear opticsQuantum mechanicsGibbs isothermSpectroscopy and Quantum Chemical StudiesSpectroscopy and Laser ApplicationsPhotosynthetic Processes and Mechanisms