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)
175 2018-07-27 15:00    Muon g-2 in the 2HDM and MSSM: comprehensive numerical analysis and absolute maxima file
174 2018-07-27 13:30    Magnetic reversal of artificial spin ice file
173 2018-07-26 14:00    Inflation in String Theory and Backreaction file
172 2018-07-13 14:00    Loop Induced Single Top Partner Production and Decay at the LHC
171 2018-07-12 17:00    The MilliQan Experiment: Search for Milli-Charged Particles at the LHC
170 2018-07-09 14:00    The principles of collective learning file
169 2018-07-02 15:00    High Precision Magnetic Field Measurement for the Muon g-2 Experiment file
168 2018-06-22 16:00    Tuning functional properties of BiFeO3 films using strain and growth chemistry file
167 2018-06-22 10:00    Success in Research Career file
166 2018-06-18 10:00    Rydberg electromagnetically induced transparency and microwave-to-optical conversion using Rydberg atoms file
165 2018-06-14 10:00    Phonons and polariton-like particles in trapped ions for quantum computation and quantum simulation file
164 2018-06-01 11:00    Topological phases in low-dimensional quantum materials file
163 2018-05-31 16:00    Dynamic control of optical properties with gated-graphene metamaterials file
162 2018-05-29 16:00    Investigation on metal nanostructure/semiconductor junction and its applications file
161 2018-05-17 13:30    Quantum Spin Liquid in Kitaev Materials file
160 2018-05-11 16:00    암페어 단위 재정의와 단전자 펌프 소자 개발 file
159 2018-05-11 14:30    Disordered Floquet topological insulators file
158 2018-05-09 16:00    Recent advances in thermoelectric bulk composites file
157 2018-04-13 10:00    Quantum meets Mechanics: from Quantum Information to Fundamental Research file
156 2018-04-11 16:00    Non-Gaussian states of multimode light generated via hybrid quantum information processing file