visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2015-07-16 16:00 
일시 2015/07/16, 4PM 
장소 E6-2, 1318 
연사 Dr. Kyunghan Hong(MIT) 

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 장소 제목
공지 2022-11-25 11:00  E6-2 #1323  [Update 세미나영상](응집물리 세미나) DMFT+ NRG: From models to real materials, from local to nonlocal correlations
208 2022-11-11 11:00  E6-2 #1323  [Update 세미나영상] (응집물리 세미나) Honeycomb oxide heterostructures for quantum spin liquid file
207 2022-10-28 11:00  E6-2 #1323  [Update 세미나영상] (응집물리 세미나) Machine-Learning-Guided Prediction models and Materials discovery for high Tc cuprates file
206 2022-10-07 11:00  E6-2 #1323  [Update 세미나 영상] (응집물리 세미나) Competing orders in a vanadium-based kagome metal monolayer file
205 2022-09-23 11:00  E6-2 #1323  [Update 세미나 영상] (응집물리 세미나) Steady Floquet-Andreev states in graphene Josephson junctions file
204 2022-06-03 11:00  E6-2 #1323  (응집물리 세미나) Theoretical Investigation of Exotic Quantum States in Low-dimensional Materials
203 2020-10-23 14:00  E6-2 #1323  Plasmon spectroscopy of low-dimensional superconductors in fluctuating regime file
202 2017-10-10 16:00  E6-2 #1323  Discovery of New 2D Materials with Diverse Physical Properties
201 2022-12-13 11:00  E6-2 #1322  Art of thin film engineering toward topological quantum computation file
200 2018-12-26 16:00  E6-1. 3rd fl. #3434  Informal Workshop on Topology and Correlation file
199 2018-10-24 10:30  E6-1, Lecture Room 1501(1F)  Photonic integration of next-generation clocks and Hertz-absolute-accuarcy optical frequenncy synthesizers file
198 2022-09-21 10:30  E6-1 #1501  [Update 세미나 영상] Distinguished Lecture 'The Magic of Moiré Quantum Matter' Prof. Pablo Jarillo-Herrero(Department of Physics, MIT) file
197 2022-09-22 11:00  E6-1 #1323  2022 가을학기 응집물리 및 광학 세미나 전체 일정 file
196 2022-08-18 10:00  E6-1 #1323  Disorder-driven phase transition in the second-order non-Hermitian skin effect
195 2022-08-12 10:00  E6-1 #1323  Twisted Bilayer Magnets file
194 2022-08-12 10:00  E6-1 #1323  Twisted Bilayer Magnets file
193 2022-05-20 11:00  E6-1 #1323  (응집물리 세미나) Exploration of new polymorphs in van der Waals crystals
192 2022-04-08 11:00  E6-1 #1323  (응집물리 세미나) Flat-surface-assisted physical phenomena occurring in single crystal metal thin film file
191 2022-03-25 11:00  E6-1 #1323  (응집물리 세미나) Hund's metallicity in ruthenate systems file
190 2014-12-22 14:00  E6, Rm1319  Dynamics of molecular motors: Power stroke vs Brownian ratchet file
189 2016-03-07 16:00  E6, 1501  Physics Colloquium : 2016 Spring file