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)
265 2019-11-01 14:30    Squeezing the best out of 2D materials file
264 2019-04-19 14:30    A family of finite-temperature electronic phase transitions in graphene multilayers file
263 2015-11-06 16:30    Topological Dirac line nodes in centrosymmetric semimetals
262 2018-03-16 16:00    Van der Waals Heterostructures from Quantum Transport to Ultrafast Optoelectronics file
261 2018-03-16 16:00    Van der Waals Heterostructures from Quantum Transport to Ultrafast Optoelectronics file
260 2022-08-09 14:00    Quantum biology in fluorescent protein: a new model system to study quantum effects in biology file
259 2016-05-13 13:30    Aperiodic crystals in low dimensions
258 2018-04-11 16:00    Non-Gaussian states of multimode light generated via hybrid quantum information processing file
257 2025-07-03 14:00  Dr. Young-Gwan Choi (Max Planck Institute )  Quantum sensing with NV centers: nanoscale magnetometry file
256 2017-05-12 13:30    Topological Dirac insulator
255 2022-05-13 16:00    High-fidelity iToffoli gate for fixed-frequency superconducting qubits file
254 2022-06-10 11:00    Record-quality two-dimensional electron systems file
253 2018-04-11 13:30    Probing 3D Structure and Physical Properties of Materials at the Single-Atom Level file
252 2018-10-15 16:00    Universal properties of macroscopic current-carrying systems file
251 2016-09-02 16:00    Quantum Electrical Transport in Topological Insulator Nanowires
250 2016-09-02 14:30    Nanoscale Thermal Physics: Seebeck Effect and Nanoscale Friction
249 2023-12-14 16:00    Superconducting qubits for large-scale quantum computers file
248 2023-04-13 11:00    [High Energy Theory Seminar]Noninvertible Gauss Law and Axions
247 2025-04-29 10:00  Dr. Yeonju Go (Brookhaven National Laboratory)  Exploring the Hottest Matter in the Universe: Quark-Gluon Plasma through Hard Probes and Artificial Intelligence file
246 2015-12-01 16:00    Introducing extra dimensions to spectroscopic studies of advanced quantum materials