Department of Physics, Faculty of Science
Kuala Lumpur, Malaysia
In this talk I will share my recent research works, mainly theoretical, involving photon-atom interactions that connect the fields of quantum optics, nonlinear optics, nanoplasmonics, nonclassical photon correlations, quantum coherence and entanglement for quantum information and communications, I will focus the topics of the spectra and correlations of mesoscopic particles composed of 4-level quantum particles in double Raman scheme. Quantum Langevin formalism with noise operators is used to describe the field operators of photon pairs (Stokes and anti-Stokes fields) emitted by a mesoscopic spherical particle . The spectra of the fields and photon correlation obtained are sensitive to the dimension of the microsphere and can be controlled by pump and control laser fields. Spectral peaks due to quantum coherence are Stark shifted by the laser fields experiencing autofocusing inside the spherical particle, causing broadening of peaks as the size of the microsphere increases. Next, I will discuss a quantum system (QS) of three-level L scheme near a metallic particle (MP) system. At near field separation, we find giant gain and absorption that are controllable by laser direction, polarization and ellipticity, enhanced by plasmonic effect. I show how the spectra depends on interparticle distance and position/direction of detector. Finally, I will discuss some proposed topics to work on.
Atomic, Molecular and Optical Physics
Ultracold quantum gases, Laser cooling and trapping
Quantum Optics, Nonlinear Optics, Optical materials
Nanophotonics, Quantum Plasmonics and Metamaterials
Intense and Ultrafast Laser Interactions
BSc. (Hons) (Physics), Universiti Sains Malaysia
Master of Engineering (Photonics) Nanyang Technological University, Singapore
Doctor of Natural Science, Universitaet Konstanz, Konstanz, Germany
Professor Dr. Raymond Ooi earned his doctorate degree in 2003 from Universitaet Konstanz, Germany in the field of quantum optics and atomic physics. His research is on quantum optics, nonlinear optics, quantum gases and plasmonics that involve interactions of quantum systems and nonlinear photonic materials with light from single photon regime to intense femtosecond laser fields, has produced more than 100 ISI publications. He was awarded the Malaysian Toray Science Foundation (MTSF) Science & Technology Award 2013 for his outstanding research, and elected the Fellow of the Academy of Sciences Malaysia (ASM) in 2015. He is a committee member of the ASM Science Journal. His ground-breaking research works comprise of controllable nonclassically correlated photon pairs, directional emission of single photon based on entanglement, superconducting photonic bandgap structure, practical laser cooling scheme for molecular gas using a few lasers, femtosecond coherent Raman spectroscopy for real-time non-invasive detection of chemical species. His recent works are quantum nonlinear plasmonics, and interactions and propagation of intense laser fields.