Control of Elementary Excitations by Acoustic Fields

Acoustic control of optically active defect centers

Color centers in solids are promising candidates for applications in quantum technologies. Because of their atomic-like optical emission, characterized by sharp lines and non-classical statistics, they can be used as single photons sources. Moreover, their long spin coherence times and spin-dependent optical transitions make them very attractive for spintronic applications. Finally, they are appropriate for sensing since their electronic energy levels are very sensitive to perturbations like electric and magnetic fields, temperature fluctuations, and lattice deformations.

 

In this project, we aim at the control and manipulation of the optoelectronic properties of defect centers in solids using acoustic fields. To this end, surface acoustic waves (SAWs) are an interesting approach because their strain and piezoelectric fields oscillating with frequencies in the range of hundreds of MHz can efficiently couple to defect centers placed close to the surface of the vibrating substrate. Similar to an external radiofrequency field, SAWs can modulate the emission energies of the light centers and induce resonant transitions between their spin sublevels.

 

In this project, we focus on light centers embedded in materials suitable for epitaxial heterostructures. This includes shallow centers in GaAs, silicon vacancies in SiC, and defect centers in two-dimensional materials such as hexagonal boron nitride.

Selected publications:

5 Author A. Hernández-Mínguez , A. V. Poshakinskiy , M. Hollenbach , P. V. Santos , G. V. Astakhov
Title

Anisotropic Spin-Acoustic Resonance in Silicon Carbide at Room Temperature

Source Phys. Rev. Lett. , 125 , 107702 ( 2020 )
DOI : 10.1103/PhysRevLett.125.107702 | Download: PDF | 3183 Cite : Bibtex RIS
A. Hernández-Mínguez, A. V. Poshakinskiy, M. Hollenbach, P. V. Santos, and G. V. Astakhov

4 Author S. Lazic , A. Espinha , S. Pinilla Yanguas , C. Gibaja , F. Zamora , P. Ares , M. Chhowalla , W. S. Paz , J. J. Palacios Burgos , A. Hernández-Mínguez , P. V. Santos , H. P. van der Meulen
Title

Dynamically tuned non-classical light emission from atomic defects in hexagonal boron nitride

Source Commun. Phys. , 2 , 113 ( 2019 )
DOI : 10.1038/s42005-019-0217-6 | 3138 Cite : Bibtex RIS
S. Lazic, A. Espinha, S. Pinilla Yanguas, C. Gibaja, F. Zamora, P. Ares, M. Chhowalla, W. S. Paz, J. J. Palacios Burgos, A. Hernández-Mínguez, P. V. Santos, and H. P. van der Meulen

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

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

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

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

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

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

Source Phys. Rev. Appl. , 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