Figure 1 | Scientific Reports

Figure 1

From: Coherent Phonon Transport Measurement and Controlled Acoustic Excitations Using Tunable Acoustic Phonon Source in GHz-sub THz Range with Variable Bandwidth

Figure 1

The scheme of spectrum-tunable narrowband acoustic phonon spectroscopy. Schematics of the experimental setup of the frequency and bandwidth tunable narrowband acoustic phonon spectroscopy using the intensity-modulated optical pump pulse. The sandwiched-layer sample (sample type 1) was used for the acoustic transport measurement by the opposite-side pump-probe geometry. The nanoscale W thin film (sample type 2) was used for the study of mechanical resonant eigen-mode excitation by the same-side pump-probe geometry.

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