Department of Physics, Engineering Physics & Astronomy

Department of Physics, Engineering Physics & Astronomy
Department of Physics, Engineering Physics & Astronomy

CMP Seminar-  "Monolithic Nonlinear and Quantum Photonics"

Amr Helmy ,

Thursday, February 26th, 2015
10:30 am @ Stirling 401


An effective approach to achieve efficient phase matching for second order nonlinearities, chi^(2) in semiconductors will be discussed. It uses dispersion engineering in Bragg reflection waveguides to harness parametric processes in conjunction with concomitant dispersion and birefringence engineering in active devices. This technology enables novel coherent light sources using frequency conversion in a self-pumped chip-form factor. These sources can also provide continuous coverage of spectral regions which are not accessible by other technologies including quantum cascade lasers.. Examples of niche applications served by this unique platform includes sources for environmental and biomedical sensing elements in the 2-3 and 7-9 micron windows and chip-based THz spectroscopy sources. In addition, approaches for enhancing the spectral coverage will be highlighted. Novel sources for entangled photons in this monolithic platform will also be reviewed. These chip-based sources can afford the integration of other devices such as laser pump sources, power and polarization splitters, gates, cavities and much more. This platform essentially offers the capability of transferring current quantum optical setups from the optical table in a lab into a practical realm and even the market place. For example, recent entangled photon pair experiments will be presented. Furthermore, design methodology that enables the generation of polarization entangled photon pairs as well as hyper entangled photons on chip with no need of external components will be elucidated.