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23 papers · 2 filters
High responsivity phototransistors based on few-layer ReS2 for weak signal detection
Erfu Liu, Mingsheng Long, Junwen Zeng +18
Two-dimensional transition metal dichalcogenides are emerging with tremendous potential in many optoelectronic applications due to their strong light-matter interactions. To fully…
Transient terahertz photoconductivity measurements of minority-carrier lifetime in tin sulfide thin films: Advanced metrology for an early-stage photovoltaic material
R. Jaramillo, Meng-Ju Sher, Benjamin K. Ofori-Okai +7
Materials research with a focus on enhancing the minority-carrier lifetime of the light-absorbing semiconductor is key to advancing solar energy technology for both early-stage and…
Femtosecond X-ray magnetic circular dichroism absorption spectroscopy at an X-ray free electron laser
Daniel J. Higley, Konstantin Hirsch, Georgi L. Dakovski +25
X-ray magnetic circular dichroism spectroscopy using an X-ray free electron laser is demonstrated with spectra over the Fe L-edges. This new ultrafast time-resolved capabil…
Characterization of electronic structure of periodically strained graphene
Marjan Aslani, C. Michael Garner, Suhas Kumar +3
We induced periodic biaxial tensile strain in polycrystalline graphene by wrapping it over a substrate with repeating pillar-like structures with a periodicity of 600 nm. Using Ram…
Hybrid Group IV Nanophotonic Structures Incorporating Diamond Silicon-Vacancy Color Centers
Jingyuan Linda Zhang, Hitoshi Ishiwata, Thomas M. Babinec +13
We demonstrate a new approach for engineering group IV semiconductor-based quantum photonic structures containing negatively charged silicon-vacancy (SiV) color centers in diam…
How to distinguish squeezed and coherent phonons in femtosecond x-ray diffuse scattering
T. Henighan, M. Trigo, M. Chollet +9
Impulsive optical excitation can generate both coherent and squeezed phonons. The expectation value of the phonon displacement oscillates at the mode frequency for the cohe…