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SUMMARY:Optical trapping in a photonic crystal hollow cavity
DTSTART:20120622T140000
DTSTAMP:20260427T215411Z
UID:6f760b4a5820caa3f0dad6e1ce372bcfd5a90176a24bfc527b56c1e6
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. R. Houdré\nLaboratoire d'optoélectronique quantique - 
 EPFL\nPhotonic crystals are defined by a periodic modulation of the refrac
 tive 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 w
 avelength. For properly designed structures a large fraction of the optica
 l field can be located in air. Such highly localized and resonant field ca
 n be exploited for sensing applications and for optical trapping. In contr
 ast with standard optical tweezers\, such optical traps exhibit specific f
 eatures linked to the resonant nature of the optical field and back-action
  effects.\nAfter a short introduction on photonics crystals\, photonics cr
 ystal optical cavities and hollow cavity structures\, I will discuss recen
 t results on optical trapping in a hollow photonic crystal cavity chip int
 egrated in a microfluidics environment. Optical trapping of 250-500 nm bea
 ds with 50-150 µW trapping power is achieved.
LOCATION:PH L1 503 http://plan.epfl.ch/?&room=phl1503
STATUS:CONFIRMED
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