*Speaker: *Marina Litinskaya (University of British Columbia)
*Date:* Tuesday, November 6th
*Time:* 12:00-1:00 pm
Includes Pizza.
*Title: * Negative refraction in atomic gases
*Abstract: *Negative refraction of light is a fascinating phenomenon, since
recently available in artificial solids, but not yet achieved in gases. I
will show that negative refraction can be realized in a periodically
modulated cold atomic gas, in the setup similar to the scheme developed for
photonic crystals. However, the intuition coming from photonic crystal
optics encounters two challenges: poorly defined gas boundary and weak
gas-light coupling combined with strong resonant absorption. Nonetheless,
our calculations demonstrate almost loss-less propagation of negatively
refracted light in strongly absorbing gas at experimental parameters
currently existing in many labs.
*Location: **B-105* @ Center for Astrophysics (60 Garden Street
<https://maps.google.com/?q=60+Garden+Street&entry=gmail&source=g>)
*Directions: *After entering the lobby of the CfA, turn right to enter the
hallway of the B building. In the hallway, turn right again, B-105 will be
the second room to the end of the hallway on the left side.
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