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Control of Elementary Excitations by Acoustic Fields

Acoustic waves are elastic vibrations propagating either in the bulk (bulk acoustic waves) or along the surface (surface acoustic waves, SAWs) of a solid. The latter resemble seismic waves created during earthquakes. Acoustic waves can be electrically excited using piezoelectric transducers, a technique widely used in signal processing. In this core research area, we exploit high-frequency acoustic waves for the modulation and control of semiconductor nanostructures.

The fields produced by acoustic waves induce a time- and spatial dependent modulation of the materials band structure, thus changing the band gap as well as the optical properties. In addition, acoustic waves in piezoelectric materials are accompanied by a piezoelectric field, which strongly interacts with free carriers. Moreover, due to their moving nature, acoustic fields can generate mobile potentials for the storage and transport of carriers.


Our current areas of interest include the following topics:


  • Electric generation and propagation control of GHz acoustic waves: III-V semiconductors are piezoelectric: acoustic waves can be generated using appropriate transducers. Here, we investigate materials and structures for wave generation as well as for the control of their propagation.
  • Long-range carrier and spin transport in nanostructures: We exploit the moving character of SAWs to transport and manipulate carriers and spins in nanostructures. Also included here is the development of nanostructures with long spin lifetimes required for the long-range acoustic transport.
  • Control and transport of dipolar excitons: We use for that purpose long-living dipolar (or indirect) excitons in a double quantum well structure. These excitons have strong dipolar interactions, and their long lifetimes enable transport by the moving band gap modulations produced by a SAW.
  • Acoustic control of microcavity exciton polaritons (MP): MPs are light-matter particles resulting from the strong coupling between quantum well excitons and photons in a microcavity. MPs have long spatial and temporal coherence, which can be manipulated by dynamic acoustic fields.
  • Dynamic magneto-acoustic effects: we study here the interaction between dynamic acoustic fields and magnetic excitations such as spin waves in epitaxial ferromagnetic/semiconductors.
  • Acoustic control of single emission centers: SiC as well as 2D-materials such as h-BN host defect centers, which act as single photon emitters even at room temperature and can be manipulated and controlled by acoustic waves.

Selected Publications

16 Author R. Fandan , J. Pedros , A. Hernández-Mínguez , F. Iikawa , P. V. Santos , A. Boscá , F. Calle

Dynamic local strain in graphene generated by surface acoustic waves

Source Nano Lett. , 20 , 402 ( 2020 )
DOI : 10.1021/acs.nanolett.9b04085 | Download arXiv: 1909.12685 | 3162 Cite : Bibtex RIS
R. Fandan, J. Pedros, A. Hernández-Mínguez, F. Iikawa, P. V. Santos, A. Boscá, and F. Calle

15 Author A. Hernández-Mínguez , F. Macià , J. M. Hernandez , J. Herfort , P. V. Santos

Large non-reciprocal propagation of surface acoustic waves in epitaxial ferromagnetic/semicondutor hybrid structures

Source Phys. Rev. Applied , 13 , 044018 ( 2020 )
DOI : 10.1103/PhysRevApplied.13.044018 | Download arXiv: 1911.11072 | 3161 Cite : Bibtex RIS
A. Hernández-Mínguez, F. Macià, J. M. Hernandez, J. Herfort, and P. V. Santos

14 Author Madeleine Msall , P. V. Santos

Focusing Surface Acoustic Wave Microcavities on GaAs

Source Phys. Rev. Applied , 13 , 014037 ( 2020 )
DOI : 10.1103/PhysRevApplied.13.014037 | Download arXiv: 1908.04980 | 3135 Cite : Bibtex RIS
Madeleine Msall, and P. V. Santos

13 Author A. Crespo-Poveda , D. D. Bühler , A. Cantarero Sáez , P. V. Santos , M. M. de Lima, Jr.

Semiconductor optical waveguide devices modulated by surface acoustic waves

Source J. Phys. D , 52 , 253001 ( 2019 )
DOI : 10.1088/1361-6463/ab1464 | Download arXiv: arXiv:1811.03051 | 3116 Cite : Bibtex RIS
A. Crespo-Poveda, D. D. Bühler, A. Cantarero Sáez, P. V. Santos, and M. M. de Lima, Jr.

12 Author Diego H. O. Machado , A. Crespo-Poveda , A. S. Kuznetsov , K. Biermann , Luis V. A. Scalvi , P. V. Santos

Generation and propagation of super-high-frequency bulk acoustic wave on GaAs substrates

Source Phys. Rev. Applied , 12 , 044013 ( 2019 )
DOI : 10.1103/PhysRevApplied.12.044013 | Download arXiv: arXiv:1907.09787v1 | 3114 Cite : Bibtex RIS
Diego H. O. Machado, A. Crespo-Poveda, A. S. Kuznetsov, K. Biermann, Luis V. A. Scalvi, and P. V. Santos

11 Author P. V. Santos , M. Msall , S. Ludwig

Acoustic field for the control of electronic excitations in semiconductor nanostructures

Source IEEE , Proceedings of the 2018 Ultrasonic Symposium , 1 ( 2018 )
DOI : 10.1109/ULTSYM.2018.8579769 | 3112 Cite : Bibtex RIS
P. V. Santos, M. Msall, and S. Ludwig

10 Author F. Iikawa , A. Hernández-Mínguez , I. Aharonovich , S. Nakhaie , Y.-T. Liou , J. M. J. Lopes , P. V. Santos

Acoustically modulated optical emission of hexagonal boron nitride layers

Source Appl. Phys. Lett. , 114 , 171104 ( 2019 )
DOI : 10.1063/1.5093299 | Download: PDF | 3087 Cite : Bibtex RIS
F. Iikawa, A. Hernández-Mínguez, I. Aharonovich, S. Nakhaie, Y.-T. Liou, J. M. J. Lopes, and P. V. Santos

9 Author A. S. Kuznetsov , K. Biermann , P. V. Santos

Dynamic acousto-optical control of confined polariton condensates: From single traps to coupled lattices

Source Phys. Rev. Res. , 1 , 023030 ( 2019 )
DOI : 10.1103/PhysRevResearch.1.023030 | Download arXiv: | 3078 Cite : Bibtex RIS
A. S. Kuznetsov, K. Biermann, and P. V. Santos

8 Author P. L. J. Helgers , H. Sanada , Y. Kunihashi , A. Rubino , C. J. B. Ford , K. Biermann , P. V. Santos

Sidewall Quantum Wires on GaAs(001) Substrates

Source Phys. Rev. Applied , 11 , 064017 ( 2019 )
DOI : 10.1103/PhysRevApplied.11.064017 | Download arXiv: 1901.02735 | 3077 Cite : Bibtex RIS
P. L. J. Helgers, H. Sanada, Y. Kunihashi, A. Rubino, C. J. B. Ford, K. Biermann, and P. V. Santos

7 Author M. Yuan , A. Hernández-Mínguez , K. Biermann , P. V. Santos

Tunneling blockade and single-photon emission in GaAs double quantum wells

Source Phys. Rev. B , 98 , 155311 ( 2018 )
DOI : 10.1103/PhysRevB.98.155311 | Download: PDF | 3044 Cite : Bibtex RIS
M. Yuan, A. Hernández-Mínguez, K. Biermann, and P. V. Santos

6 Author A. Hernández-Mínguez , J. Lähnemann , S. Nakhaie , J. M. J. Lopes , P. V. Santos

Luminescent Defects in a Few-Layer h-BN Film Grown by Molecular Beam Epitaxy

Source Phys. Rev. Applied , 10 , 044031 ( 2018 )
DOI : 10.1103/PhysRevApplied.10.044031 | Download arXiv: 1902.08528 | 3037 Cite : Bibtex RIS
A. Hernández-Mínguez, J. Lähnemann, S. Nakhaie, J. M. J. Lopes, and P. V. Santos

5 Author C. Hubert , Y. Baruchi , Y. Mazuz-Harpaz , K.Cohen , K. Biermann , M. Lemeshko , K. West , L. Pfeiffer , R. Rapaport , P. V. Santos

Attractive Dipolar Coupling between Stacked Exciton Fluids

Source Phys. Rev. X , 9 , 021026 ( 2019 )
DOI : 10.1103/PhysRevX.9.021026 | Download: PDF | 3034 Cite : Bibtex RIS
C. Hubert, Y. Baruchi, Y. Mazuz-Harpaz, K.Cohen, K. Biermann, M. Lemeshko, K. West, L. Pfeiffer, R. Rapaport, and P. V. Santos

4 Author A. Hernández-Mínguez , Y.-T. Liou , P. V. Santos

Interaction of surface acoustic waves with electronic excitations in graphene

Source J. Phys. D , 51 , 383001 ( 2018 )
DOI : 10.1088/1361-6463/aad593 | Download arXiv: 1811.00040 | 3028 Cite : Bibtex RIS
A. Hernández-Mínguez, Y.-T. Liou, and P. V. Santos

3 Author A. S. Kuznetsov , P. L. J. Helgers , K. Biermann , P. V. Santos

Quantum confinement of exciton-polaritons in structured (Al,Ga)As microcavities

Source Phys. Rev. B , 97 , 195309 ( 2018 )
DOI : 10.1103/PhysRevB.97.195309 | Download: PDF | 2976 Cite : Bibtex RIS
A. S. Kuznetsov, P. L. J. Helgers, K. Biermann, and P. V. Santos

2 Author Y.-T. Liou , A. Hernández-Mínguez , J. Herfort , J. M. J. Lopes , A. Tahraoui , P. V. Santos

Acousto-electric transport in MgO/ZnO-covered graphene on SiC

Source J. Phys. D , 50 , 464008 ( 2017 )
DOI : 10.1088/1361-6463/aa8e8a | Download arXiv: 1708.05236 | 2954 Cite : Bibtex RIS
Y.-T. Liou, A. Hernández-Mínguez, J. Herfort, J. M. J. Lopes, A. Tahraoui, and P. V. Santos

1 Author M. Yuan , C. Hubert , S. Rauwerdink , A. Tahraoui , B von Someren , K. Biermann , P. V. Santos

Generation of surface acoustic waves on doped semiconductor substrates

Source J. Phys. D , 50 , 484004 ( 2017 )
DOI : 10.1088/1361-6463/aa92a5 | 2944 Cite : Bibtex RIS
M. Yuan, C. Hubert, S. Rauwerdink, A. Tahraoui, B von Someren, K. Biermann, and P. V. Santos