Cavity-dressed materials
DIPC Seminars
- Speaker
-
Claudiu Genes, Max Planck Institute for the Science of Light, Germany
- When
-
2020/02/14
13:00 - Place
- Donostia International Physics Center
- Add to calendar
-
iCal
Confining light modes to small volumes (optical or microwave cavities,
waveguides, optical fibers, plasmonic structures, etc.) provides a platform
for strong coherent light-matter interactions even at the quantum level. This
allows for the control of material properties such as charge conductivity or
energy transfer, of optical nonlinearities and of quantum states of
macroscopic solid state mechanical resonators.
Electron-photon interactions in optical cavities can be used to engineer of
systems exhibiting enhanced cooperativity [1] and optical nonlinearities. For
organic materials, coupling of electronic resonances to plasmonic structures
can lead to an increase in charge conductivity [2] owing to the delocalized
nature of polaritonic hybrid light-matter states which renders them resilient
to disorder [3]. More complex models including coupling of electrons to
molecular vibrations and bulk phonons [4] reveal the role of the delocalized
photon mode in the process of acceptor-donor Förster resonance energy [5].
Photon-phonon interactions in optomechanics occur via the radiation pressure
effect and can be exploited to control the motion of solid-state-based
mechanical resonators. A first technique employs the cavity self-cooling
effect and can be improved by designing hybrid cavities with photonic crystal
mirrors that inhibit re-heating [6]. A second technique employs an electronic
feedback loop that can be either analytical (cold-damping) or designed via
machine learning methods. Feedback techniques can be successfully applied to
the simultaneous cooling of many mechanical resonances, i.e. for the partial
refrigeration of a mechanical object subject to an external thermal bath [7].
References:
[1] D. Plankensteiner, C. Sommer, H. Ritsch and C. Genes, Cavity antiresonance
spectroscopy of dipole coupled subradiant arrays, Phys. Rev. Lett. 119, 093601
(2017).
[2] E. Orgiu, J. George, J. Hutchison, E. Devaux, J. F. Dayen, B. Doudin, F.
Stellacci, C. Genet, J. Schachenmayer, C. Genes, G. Pupillo, P. Samori and T.
W. Ebbesen, Conductivity in organic semiconductors hybridized with the vacuum
field, Nat. Mat. 14, 1123 (2015).
[3] D. Haggenmüller, J. Schachenmayer, S. Schütz, C. Genes and G. Pupillo,
Cavity enhanced transport of charge, Phys. Rev. Lett. 119, 223601 (2017).
[4] M. Reitz, C. Sommer, B. Gurlek, V. Sandoghdar, D. Martin-Cano and C.
Genes, Molecule-photon interactions in phononic environments,
arxiv:1912.02635, (2019).
[5] M. Reitz, C. Sommer and C. Genes, Langevin approach to quantum optics with
molecules, Phys. Rev. Lett. 122, 203602 (2019).
[6] O. Cernotik, A. Dantan and C. Genes, Cavity quantum electrodynamics with
frequency-dependent reflectors, Phys. Rev. Lett. 122, 243601 (2019).
[7] C. Sommer and C. Genes, Partial optomechanical refrigeration via multi-
mode cold damping feedback, Phys. Rev. Lett. 123, 203605 (2019).
Host: Ricardo Díez Muiño