Picosecond Laser Ultrasonic Measurements Of Interlayer Elastic Properties Of 2H-MoSe2 And 2H-WSe2
What Has Been Achieved:
Ultrafast optical pump-probe measurements of sound velocity, elastic constants, and phonon lifetimes in TMD crystals.
Importance of the Achievement: Phonon lifetime measurements for these novel materials are rare, and they are useful in predicting thermal conductivity. Also the strong reflectivity signals produce by these relatively small elastic strains are a promising indicator of the future effectiveness of these materials as transient ultrasonic strain sensors.