A phononic frequency comb from a single resonantly driven nanomechanical mode (Prof. Eva Weig)
- (likely in-person)
- Datum: 28.06.2022
- Uhrzeit: 14:30
- Vortragende(r): Prof. Eva Weig
- Technische Universität München
The broken time reversal symmetry gives rise to the squeezing of the string’s fluctuations. As a result of the high mechanical Q factor, the squeezing ratio is directly accessible from a spectral measurement. It is encoded in the intensities of the two spectral peaks arising from the slow dynamics of the system in the rotating frame. For stronger driving, an onset of self-sustained oscillation is observed which leads to the generation of a nanomechanical frequency comb. The effect is a consequence of a resonantly induced negative effective friction force induced by the drive. This is the first observation of a frequency comb arising solely from a single mode and a single, resonant drive tone.