Presentation on theme: "Modern Optics V- special issues on quantum optics Special topics course in IAMS Lecture speaker: Wang-Yau Cheng 2006/4."— Presentation transcript:
Modern Optics V- special issues on quantum optics Special topics course in IAMS Lecture speaker: Wang-Yau Cheng 2006/4
Outline Wave properties of light Polarization of light Concept of linewidth Coherence of light Special issues on quantum optics
–Introduction to the missions of “Quantum Control Laboratory” in IAMS
量子控制銫原子之研究 ── 人們的夢想：從了解微觀世界到控制微觀世界 Studies on Quantum Controlled Cs atoms -- A dream from comprehend to control the microscopic world
Outline Quantum controlled by femto-second comb laser What we need in improving the quantum control technique?
How come a God given quantum system can be controllable?
Quantum system determined by God Quantum system controlled by human being Photon quantum state Total quantum system then be controllable ! or Or … Atom wavefunction Ionization rate Molecule dynamics Cavity modes Electron-hole pair A quantum system may include: matter quantum states photon states
For example By controlling laser pulse, control P to the maximum value Laser pulse Atom / molecule Dressed Atom/molecule Mixed state Sysem can be controlled to quantum state m
Femto-second comb laser -- Introduction People now can prepare 10 5 photon coherent states at the same time ! f rep I(f) f 0 f rep I(f) f 0 f rep Time Domain Frequency Domain Time Domain Frequency Domain t E(t) 1/f rep F.T. Phase velocity Group velocity comes from phase shift of pulse in cavity (averaged on round trip time D. Jones, et al. Science, 288, 635, Apr. 28, 2000
Future directions are wide open Optical frequency metrology: Ultrastable optical frequency synthesizer/network Optical atomic clock Ultrafast lasers for precision atomic & molecular spectroscopy Tests of fundamental physical principles Quantum Optics & Ultrafast physics Coherent control of quantum states Arbitrary pulse engineering, Precision control of ultrafast phenomenon Ultrafast laser with cold atoms: Ultrahigh resolution spectroscopy Coherent control of THz radiation Control of single cycle optical pulses: Extreme nonlinear optics, such as X-ray generation
How to make a highly reliable, stable, precise, accurate, reproducible comb photons? Comb frequency reference to narrow-linewidth atom transition directly!
How come ultra-wide band can resolve ultra-narrow linewidth?
K 2 photo-dissociation channels controlling? Controlling ultracold molecular vibrations? Control of molecular vibration
Long term possibilities and collaborating –Quantum control photons quantum information science nonlinear optics quantum optics Pulse engineering THz radiation controlling –Quantum control molecules Chemical dynamics/chemical reaction –Quantum control cool atoms Atoms in MOT (magnetic-optical trap)/optical lattice BEC