visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2015-07-16 16:00 
연사  
장소 E6-2, 1318 

Next-generation ultrafast laser technology for nonlinear optics and strong-field physics

2015/7/16 (Thurs) 4PM, Rm 1318 (Faculty Conference Rm.)

Dr. Kyunghan Hong, MIT

 

Femtosecond high-power Ti:sapphire chirped-pulse amplification (CPA) laser technology at 800 nm of wavelength has been widely and almost exclusively used over last two decades for studying ultrafast nonlinear optics and strong-field phenomena. Recently ultrafast optical parametric chirped-pulse amplification (OPCPA) technology has made a rapid progress, so that various wavelengths are available at high intensities. The wavelength selectivity provides interesting opportunities in ultrafast nonlinear optics and strong-field phenomena driven especially at mid-infrared (MIR) wavelengths. High-harmonic generation (HHG) driven by MIR wavelengths has been proven to be a reliable way to achieve a tabletop coherent water-window soft X-ray (280-540 eV) or keV source. On the other hand, the super-continuum generation (SCG) in the MIR range is highly useful for detecting biomedical materials and air pollutants with the resonant fingerprints of the common molecules, such as H2O, CO2, CO, and NH4. The highly nonlinear laser filamentation process enables the SCG in bulk dielectrics and gases. 


In this presentation, I review our recent progress on a multi-mJ MIR (2.1 m) OPCPA system operating at a kHz repetition rate, pumped by a picosecond cryogenically cooled Yb:YAG laser. Using this novel MIR source, we demonstrate high-flux soft X-ray HHG up to the water-window range. In addition, I present the MIR filamentation in dielectrics showing 3-octave-spanning SCG and sub-2-cycle self-compression. I will also discuss novel high-energy pulse synthesizer technology based on multi-color OPCPA systems. The work presented here provides an excellent platform of next-generation strong-field laser technology.

 

Contact: HeeKyunh Ahn, Laser Science Research Lab. Tel. 2561

번호 날짜 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
535 2016-06-16 16:00    Quantum information processing using quantum dots and photonic crystal cavities
534 2016-07-07 14:00    Let there be topological superconductors
533 2016-07-08 11:00    Isostatic magnetism
532 2016-07-08 14:00    Electronic quasiparticles in the quantum dimer model
531 2016-07-28 16:00    Low Dimensional Electrons: On the Road to Hybrid Quantum Systems
530 2016-08-04 14:30    Relational Logic (with applications to Quantum Mechanics, String Theory, Cosmology, Neutrino Oscillations, Statistical Mechanics)
529 2016-09-02 14:30    Nanoscale Thermal Physics: Seebeck Effect and Nanoscale Friction
528 2016-09-02 16:00    Quantum Electrical Transport in Topological Insulator Nanowires
527 2016-09-05 16:00    Physics Colloquium : 2016 Fall file
526 2016-09-21 16:00    Entanglement probe of two-impurity Kondo physics
525 2016-09-22 15:30    Polarized 3He, Polarized Neutrons and New Interactions beyond the Standard Model
524 2016-09-22 15:30    Polarized 3He, Polarized Neutrons and New Interactions beyond the Standard Model
523 2016-09-29 16:00    2016 Fall, Physics Seminar Serises file
522 2016-09-29 16:00    Large-scale Silicon Photonic MEMS Switches
521 2016-09-29 16:00    Exploring the phase diagram of BaBiO3: epic voyage of just another bad trip?
520 2016-10-07 13:30    “Symmetry and topology in transition metal dichalcogenide?”
519 2016-10-07 16:00    “Tilt engineering of 4d and 5d transition metal oxides?”
518 2016-10-17 11:00    IMS and examples of the studies on optoelectronic materials
517 2016-10-18 13:30    "Visualization of oxygen vacancy in motion and the interplay with electronic conduction"
516 2016-10-18 15:00    “Hybrid quantum systems with mechanical oscillators”