Terahertz spectroscopy of quantum wells.
A collaboration between physicists in Japan and Germany applied terahertz emission spectroscopy to understand the 3D dynamics in quantum wells. Their non-contact, non-destructive method can be applied to assessing the ultrafast carrier dynamics, strain physics, phonon dynamics, and ultrafast dielectric responses at the local level in new materials.
Their work can be found in Advanced Optical Materials: https://onlinelibrary.wiley.com/doi/10.1002/adom.202100258
#sciencenews #THz #spectroscopy #SmartMaterials
A collaboration between physicists in Japan and Germany applied terahertz emission spectroscopy to understand the 3D dynamics in quantum wells. Their non-contact, non-destructive method can be applied to assessing the ultrafast carrier dynamics, strain physics, phonon dynamics, and ultrafast dielectric responses at the local level in new materials.
Their work can be found in Advanced Optical Materials: https://onlinelibrary.wiley.com/doi/10.1002/adom.202100258
#sciencenews #THz #spectroscopy #SmartMaterials
Wiley Online Library
Ultrafast Terahertz Nanoseismology of GaInN/GaN Multiple Quantum Wells
Ultrafast terahertz (THz) emission from laser-excited Ga0.8In0.2N/GaN multiple quantum wells (MQWs) consists of three distinct, differently timed signals. They originate from i) laser-induced dynamic...
Enhanced Raman scattering.
Devices at the single nanometre scale require characterisation at the atomic level. A team at the Japanese Institute for Molecular Science and the Fritz-Haber Institute has demonstrated a huge enhancement of Raman scattering at the atomic point contact of a plasmonic silver tip.
The results are available in ACS Nano Letters: https://pubs.acs.org/doi/10.1021/acs.nanolett.1c00998
#sciencenews #spectroscopy
Devices at the single nanometre scale require characterisation at the atomic level. A team at the Japanese Institute for Molecular Science and the Fritz-Haber Institute has demonstrated a huge enhancement of Raman scattering at the atomic point contact of a plasmonic silver tip.
The results are available in ACS Nano Letters: https://pubs.acs.org/doi/10.1021/acs.nanolett.1c00998
#sciencenews #spectroscopy
pubs.acs.org
Atomic Point Contact Raman Spectroscopy of a Si(111)-7 × 7 Surface
Tip-enhanced Raman scattering (TERS) has recently demonstrated the exceptional sensitivity to observe vibrational structures on the atomic scale. However, it strongly relies on electromagnetic enhancement in plasmonic nanogaps. Here, we demonstrate that atomic…