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Optical excitation of acoustic phonons in quartz
The objective of this project is to use a stimulated Raman scattering setup to characterize the vibrational modes (acoustic phonons) of a quartz slab of variable thickness.
Phonons are quantized vibrational modes and a promising resource for quantum information
transduction between the optical and the rf frequency regimes. Acoustic phonons are analogous to the ringing of a wine glass and can be excited and probed optically by a nonlinear optical process, called stimulated Brillouin scattering [1]. This method uses two incident laser fields of frequencies w1 and w2. The nonlinear signal at frequency 2w1-w2 is resonantly enhanced when the energy difference w1-w2 matches the vibrational frequency Omega via.
The objective of this project is to use a stimulated Raman scattering setup (see figure
below) to characterize the vibrational modes (acoustic phonons) of a quartz slab
of variable thickness. Other materials (sapphire, diamond, silica spheres,...) can be investigated as well and compared against each other. The work involves microwave electronics, optomechanics, and nonlinear optical spectroscopy. Please see project description for more details.
Prerequisites:
Electromagnetic theory, electronics and measurement techniques.
References:
[1] W. H. Renninger, P. Kharel, R. O. Behunin and P. T. Rakich, “Bulk crystalline optomechanics,”
Nature Physics 14, 601–607 (2018).
Phonons are quantized vibrational modes and a promising resource for quantum information transduction between the optical and the rf frequency regimes. Acoustic phonons are analogous to the ringing of a wine glass and can be excited and probed optically by a nonlinear optical process, called stimulated Brillouin scattering [1]. This method uses two incident laser fields of frequencies w1 and w2. The nonlinear signal at frequency 2w1-w2 is resonantly enhanced when the energy difference w1-w2 matches the vibrational frequency Omega via. The objective of this project is to use a stimulated Raman scattering setup (see figure below) to characterize the vibrational modes (acoustic phonons) of a quartz slab of variable thickness. Other materials (sapphire, diamond, silica spheres,...) can be investigated as well and compared against each other. The work involves microwave electronics, optomechanics, and nonlinear optical spectroscopy. Please see project description for more details.
Prerequisites: Electromagnetic theory, electronics and measurement techniques.
References: [1] W. H. Renninger, P. Kharel, R. O. Behunin and P. T. Rakich, “Bulk crystalline optomechanics,” Nature Physics 14, 601–607 (2018).
Not specified
Supervisor: Nicolas Carlon-Zambon (carlonn@ethz.ch), Lukas Novotny (lnovotny@ethz.ch)
Supervisor: Nicolas Carlon-Zambon (carlonn@ethz.ch), Lukas Novotny (lnovotny@ethz.ch)