[printer friendly version]

OSA Student Chapter Meeting

SPEAKER: Scott Wilde
TITLE:Excitation of emission lines of atomic oxygen by dissociative ionization of oxygen molecules by helium metastables
The effect of the ionization processes on the optical emission of a low temperature plasma are significant. For instance, the excitation potential from metastable helium can readily ionize molecules and atoms which reduces the breakdown voltage. Low temperature plasmas are characterized by kinetic and internal energies being low compared to the second ionization potential but appreciably above the first ionization potential. Thus only singly ionized and neutrals will be present, this is usually the case in flames. Discussion of observations of atomic oxygen emission lines from processes involving metastable helium in a low temperature plasma will be presented

TITLE: Catch and Release Photons
In the dream of quantum internet, the information would be carried by photons, which are often called "flying qubits". We are not there yet, how to store and release a photon with high efficiency , enough duration and highly identical phase and frequency is the key problem. Two new papers in PRL present original and complementary developments in the pursuit of a practical matter-photon quantum interface. Y. Yin et al use superconducting circuit and control microwave photon, while D. Maxwell et al use Rydberg atoms and operate on optical photon.

Thursday, March 28, 2013
IQSE 578, 12:30 noon
Mitchell Physics Building

Department of Physics and Astronomy
Institute for Quantum Science and Engineering
Texas A&M University

(Pizza lunch as usual. Newcomers welcome!)

Host: Andrew Traverso