Funding period: 2021 – 2024

Project leader: Eva Weig (TUM)

Scientific staff: Ahmed Barakat, Maria Kallergi, Gianluca Rastelli (collaborator)

Former members: Yannick Klaß, Anh Tuan Le, Jana Ochs

High Q nanomechanical string resonators are employed as a well-controlled platform to explore the fluctuation-induced nonlinear dynamics in driven systems. In particular, we will focus on the effects of a strong resonant drive. In the nonlinear response regime, this leads to the squeezing of thermomechanical fluctuations. For even stronger driving, the observed resonantly induced negative friction and the resulting dynamical instability will also be addressed. Finally, we will include systems under non-harmonic driving and engineered fluctuations. The project will thus enable fundamental insights into the classical nonlinear dynamics of driven systems.

List of publications

2022

• Frequency Comb from a Single Driven Nonlinear Nanomechanical Mode
  J. S. Ochs, D. K. J. Boneß, G. Rastelli, M. Seitner, W. Belzig, M. I. Dykman, and E. M. Weig
  Phys. Rev. X 12, 041019 - published 18 November 2022
   
• Determining Young's modulus via the eigenmode spectrum of a nanomechanical string resonator
  Y. S. Klaß, J. Doster, M. Bückle, R. Braive, and E. M. Weig

  Appl. Phys. Lett. 121, 083501 – published 22 August 2022

2021

• Resonant nonlinear response of a nanomechanical system with broken symmetry

  J. S. Ochs, G. Rastelli, M. Seitner, M. I. Dykman, and E. M. Weig
  Phys. Rev. B 104, 155434 – published 27 October 2021

• Room temperature cavity electromechanics in the sideband-resolved regime
  A. T. Le, A. Brieussel, and E. M. Weig
  J. Appl. Phys. 130, 014301 – published 6 July 2021
   
• Persistent Response in an Ultrastrongly Driven Mechanical Membrane Resonator
  F. Yang, F. Hellbach, F. Rochau, W. Belzig, E. M. Weig, G. Rastelli, and E. Scheer
  Phys. Rev. Lett. 127, 014304 – published 2 July 2021
  also related to projects C02, and C03
   
• Universal Length Dependence of Tensile Stress in Nanomechanical String Resonators
  M. Bückle, Y. S. Klaß, F. B. Nägele, R. Braive, and E. M. Weig
  Phys. Rev. Applied 15, 034063 – published 22 March 2021
   
• Amplification and spectral evidence of squeezing in the response of a strongly driven nanoresonator to a probe field
  J. S. Ochs, M. Seitner, M. I. Dykman, and E. M. Weig
  Phys. Rev. A 103, 013506 – Published 7 January 2021

Further Publications

• Universal transduction scheme for nanomechanical systems based on dielectric forces
  Q. P. Unterreithmeier, E. M. Weig, and J. P. Kotthaus 
  Nature 458, 1001 - published 23 April 2009
   
• Spectral Evidence of Squeezing of a Weakly Damped Driven Nanomechanical Mode
  J. S. Huber, G. Rastelli, M. J. Seitner, J. Kölbl, W. Belzig, M. I. Dykman, and E. M. Weig
  Phys. Rev. X 10, 021066 – published 23 June 2020
   
• Resonantly Induced Friction and Frequency Combs in Driven Nanomechanical Systems
  M. I. Dykman, Gianluca Rastelli, M. L. Roukes, and Eva M. Weig
  Phys. Rev. Lett. 122, 254301 – published 27 June 2019