Reflection setup


We implemented the new capability of measuring TG signals in reflection! 


Scheme of the reflection setup


During the last years the TIMER team, in collaboration with the K. Nelson group at the MIT (BT. 20174120), the Giordano group at the Universit√© Claude Bernard Lyon 1 (BT. 20184032) and the Baldi group at the Trento University (BT. 20184081), implemented the reflection setup. This setup, shown in the above picture, allows to detect the phase-matched back-scattered transient grating signal. This capability opens up the possibility of investigating opaque samples, previously not available at TIMER, as well as measuring both the reflected and transmitted signal in thin, transparent membranes. 

In particular, the proposed approach has proven ideal to study ultrahigh frequency SAWs in a broad range of materials and will bridge the wave vector gap in surface phonon spectroscopy between Brillouin scattering and He atom scattering as demonstrated in the following publication:

Generation and detection of 50 GHz surface acoustic waves by extreme ultraviolet pulses
Maznev A.A., Mincigrucci R., Bencivenga F., Unikandanunni V., Capotondi F., Chen G., Ding Z., Duncan R.A., Foglia L., Izzo M.G., Masciovecchio C., Martinelli A., Monaco G., Pedersoli E., Bonetti S., Nelson K.A.
Applied Physics Letters, Vol. 119 - 4, p. 1ENG (2021)

 


 






 
 
Last Updated on Tuesday, 19 March 2024 21:21