8 papers
GaAs/AlAs Acoustic Nanocavities for Coherent GHz-THz Phonon Engineering
S. Sandeep, E. R. Cardozo de Oliveira, E. Mehdi +1
The controlled confinement of high-frequency acoustic phonons in semiconductor nanostructures has emerged as a key ingredient for functional nanophononic and hybrid quantum technol…
Open Nanoacoustic Resonators Based on SrTiO/YBaCuO Superlattices
S. Sandeep, O. Colmegna, S. Carreira +4
We report the design and experimental demonstration of an open nanophononic cavity based on a hybrid oxide superlattice composed of SrTiO (STO) and YBaCuO (YBCO…
High-Performance Nanophononic Resonators in Self-Suspended WSe Domes and Drums
Jens-Christian Drawer, Bo Han, Edson Rafael Cardozo de Oliveira +7
Van der Waals materials are ideally suited for the implementation of high-frequency nanophononic resonators with atomically flat interfaces. Here, we present two versatile van der…
Coupled Topological Interface States and Phonon Molecules in GaAs/AlAs Superlattices
S. Sandeep, O. Colmegna, C. Xiang +5
Topological interface states in one-dimensional superlattices provide spatially localized phonon modes protected by the topology of the underlying band structure. In GaAs/AlAs dist…
Boundary-dominated optomechanics in silicon metamaterial membranes
David González-Andrade, Paula Nuño Ruano, Jianhao Zhang +10
Stimulated Brillouin scattering in integrated photonic waveguides enables coherent coupling between optical photons and gigahertz acoustic phonons, providing a powerful mechanism f…
Towards Environmentally Responsive Hypersound Materials
Edson Rafael Cardozo de Oliveira, Gastón Grosman, Chushuang Xiang +6
The engineering of acoustic phonons in the gigahertz (GHz) range holds significant potential for technological breakthroughs in areas such as data processing, sensing and quantum c…