Quantum control of condensed matter systems

Date: 
March 9, 2009 (All day)
Speaker: 
Gurudev Dutt
Speaker's Institution: 
University of Pittsburgh

Optical detection and optical therapies of bone cancer

Date: 
June 1, 2009 (All day)
Speaker: 
Vince Rossi
Speaker's Institution: 
Pacific University

Measurement and Control of Transverse Photonic Degrees of Freedom via Parity Sorting and Spin-Orbit Interaction

Date: 
May 10, 2010 (All day)
Speaker: 
Cody Leary

We discuss new methods for the measurement and control of transverse photonic degrees of freedom. We demonstrate an interferometric mode sorter for two-dimensional (2-D) parity of transverse spatial states of light, present the first experimental 2-D parity sorting measurements of Hermite-Gauss transverse spatial modes, and discuss applications to quantum information processing.

A Fully Tunable Microcavity

Date: 
February 8, 2010 (All day)
Speaker: 
Dr. Russell Barbour

Semiconductor optical microcavities that combine high Q-factors with a small mode volume play a vital role in modifying the interaction between light and matter. Several interesting phenomenon arise when an emitter is introduced into such a cavity. These include enhancement or suppression of the spontaneous emission rate (weak coupling) and normal mode splitting (strong coupling).

Towards Atomic-Scale Optical Probes

Date: 
May 24, 2010 (All day)
Speaker: 
Dr. Jeffrey Guest

Over the past two decades, ultra-high vacuum (UHV) scanning tunneling microscopy (STM) and single particle laser spectroscopy have made great strides in measuring and controlling nanoscale and atomic-scale systems incomplementary ways.

Optofluidic ring resonator technology platform for rapid and sensitive biological and chemical sensing

Date: 
February 10, 2009 (All day)
Speaker: 
Dr. Xudong Fan

The optical ring resonator is an emerging sensing technology that has recently been under intensive investigation. In a ring resonator, light propagates in the form of whispering gallery modes (WGMs), which results in a light-analyte interaction length much longer than the resonator physical size. Consequently, the ring resonator can achieve a much improved detection limit, lower sample volume, and larger integration density than the traditional waveguide or optical fiber based sensor.

Towards table-top free-electron lasers (FELs) using laser-accelerated electron beams

Date: 
May 28, 2009 (All day)
Speaker: 
Matthias Fuchs

Laser-plasma accelerators can accelerate electrons to relativistic energies over distances three orders of magnitude smaller than required by conventional accelerators. Recent breakthroughs have led to stable, quasi-monoenergetic electron beams in the gigaelectronvolt-scale from few-centimeter accelerator lengths. Owing to their unprecedented features, such as intrinsically ultrashort pulse durations and expected low emittances, these electron beams are perfectly suited for driving a next generation of X-ray light sources.

Observation of quantum diffractive collisions using shallow atomictraps

Date: 
May 11, 2009 (All day)
Speaker: 
Dr. Kirk Madison

We discuss measurements and calculations of the trap loss rate for laser cooled 87Rb atoms confined in either a magneto-optic or a magnetic quadrupole trap when exposed to a room temperature background gas of Ar. We study the loss rate as a function of trap depth and find that copious glancing collisions, which occur in the so-called quantum-diffractive regime and impart very little energy to the trapped atoms, result in significant differences in the loss rate for the MOT compared to a pure magnetic trap due solely to the difference in potential depth.

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