Optical trapping in a photonic crystal hollow cavity
Event details
| Date | 22.06.2012 |
| Hour | 14:00 |
| Speaker |
Prof. R. Houdré Laboratoire d'optoélectronique quantique - EPFL |
| Location | |
| Category | Conferences - Seminars |
Photonic crystals are defined by a periodic modulation of the refractive index on the wavelength scale in dielectric structures. Point defect in the photonics crystal lattice leads to the build-up of resonant cavity modes, which allows light confinement in volumes smaller than the cubic wavelength. For properly designed structures a large fraction of the optical field can be located in air. Such highly localized and resonant field can be exploited for sensing applications and for optical trapping. In contrast with standard optical tweezers, such optical traps exhibit specific features linked to the resonant nature of the optical field and back-action effects.
After a short introduction on photonics crystals, photonics crystal optical cavities and hollow cavity structures, I will discuss recent results on optical trapping in a hollow photonic crystal cavity chip integrated in a microfluidics environment. Optical trapping of 250-500 nm beads with 50-150 µW trapping power is achieved.
After a short introduction on photonics crystals, photonics crystal optical cavities and hollow cavity structures, I will discuss recent results on optical trapping in a hollow photonic crystal cavity chip integrated in a microfluidics environment. Optical trapping of 250-500 nm beads with 50-150 µW trapping power is achieved.
Practical information
- Informed public
- Free
Organizer
- ICMP
Contact
- Arnaud Magrez