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)
425 2020-11-17 12:00    Quantum- & Nano-Photonics" 세미나 시리즈 file
424 2023-05-15 16:00    Role of dark Higgs boson in DM physics and cosmology file
423 2019-10-15 16:00    Moiré superlattices and graphene quasicrystal file
422 2024-07-22 14:00    Nonthermal electronic orders in photo-doped Mott insulators
421 2017-08-16 16:00    Phonon-driven spin-Floquet valleytro-magnetism file
420 2025-02-03 14:00  Prof. Nobuyuki Yoshioka  Towards early fault-tolerant quantum computing file
419 2023-07-14 11:00    Interfaces engineering of thin film oxides
418 2024-07-25 16:00    Generation and Certification of Optical Quantum States for Information Processing file
417 2019-08-14 16:00    Quantum Optics, at the heart of quantum metrology and quantum information file
416 2019-10-17 16:00    Top down manipulation of Waves : From Metamaterials, Correlated Disorder, Quantum Analogy, to Digital Processing file
415 2018-12-27 16:00    Quantum Innovation (QuIN) Laboratory file
414 2025-03-07 11:00  Prof. Myunglae Jo  A tunable Mach-Zehnder interferometer in quantum hall graphene file
413 2023-09-27 16:00    Chiral Magnets: Domain-Wall Skyrmions and String Theory Realization
412 2019-06-04 17:00    Stochastic nature of bacterial eradication using antibiotics file
411 2015-06-03 12:00    The First Wednesday Multidisciplinary Forum file
410 2016-11-10 16:00    Low Dimensional Active Plasmonics and Electron Optics in Graphene
409 2023-07-20 16:00    [CAPP Seminar] Cosmoparticle Physics of Dark Universe file
408 2018-09-07 15:00    Recent developments in density functional theory: From new functionals to the nature of the chemical bond file
407 2021-04-09 10:00    Integrated Lithium Niobate Photonics file
406 2016-04-19 14:00    Nonlocal collisional electron transport in partially ionized plasma generation, structure, and stability