Nano-optics gets quantum (Prof. R. Quidant)
- Datum: 12.05.2015
- Uhrzeit: 14:30 - 16:00
- Vortragende(r): Professor Dr. Romain Quidant, ICFO, Barcelona, Spain
- Raum: Herbert Walther Lecture Hall
- Gastgeber: MPQ
In this talk we will present our recent advances in enhanced light-matter interaction on the nanometer scale and their applications to quantum optics.The first part of the talk focuses on the controlled interaction of Nitrogen Vacancy (NV) centers with optical nanostructures. We first discuss an approach in which light is used to trap and manipulate individual nanodiamonds containing a single NV. We demonstrate both translational and angular control of the trapped NV and discuss potential applications to vectorial magnetometry and mapping of the electromagnetic local density of states. In a second step, our manipulation technique is applied to deterministically locate single nano-diamonds in the hot spot of plasmonic antennas. Last but not least we demonstrate that the hybrid system formed by a single NV coupled to a gold gap antenna can operate as an efficient and fast optical switch upon non-resonant CW illumination.
The second part of the talk presents
our latest advances in nano-optical trapping and nano-optomechanics. We
first introduce the use of an optically levitating nanoparticle in
vacuum as a nano-optomechanical system with unprecedented performances.
We describe his unique linear and nonlinear mechanical properties and
demonstrate the possibility to cool down its center of mass by applying
parametric feed back. We then discuss how the optical near field of
resonant plasmonic nanostructures enables us trapping tiny nano-objects
under moderate light intensities. Similar to the optical spring effect
in high-finesse optical cavities, we demonstrate a pronounced back
action effect that both increases the object confinement and relaxes the
requirements on the minimum intra-cavity field intensity.