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
227 2019-08-22 16:00  #1323, E6-2  Physics and Applications in Nanoelectronics and Nonomechanics file
226 2022-03-25 11:00  E6-1 #1323  (응집물리 세미나) Hund's metallicity in ruthenate systems file
225 2016-08-04 14:30  KAIST Natural Science Building (E6-5), EDU 3.0 Room(1st fl.)  Relational Logic (with applications to Quantum Mechanics, String Theory, Cosmology, Neutrino Oscillations, Statistical Mechanics)
224 2021-03-25 16:00  Online Seminar (Zoom)  Search for dark matter axion with Rydberg atoms file
223 2023-06-01 16:00  E6-2, #5301  Hall viscosity and topological phenomena
222 2018-07-09 14:00  #1323, E6-2  The principles of collective learning file
221 2023-10-11 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  [CAPP seminar] Particle Physics with Neutrinos file
220 2019-05-30 16:00  #1323, E6-2  Tuning the excitonic properties of semiconductors with light-matter interactions file
219 2014-12-22 14:00  E6, Rm1319  Dynamics of molecular motors: Power stroke vs Brownian ratchet file
218 2019-05-03 11:00  E6-2. 2st fl. #2502  Exotic Magnetism file
217 2015-03-04 12:00  1323호, E6-2  Bioimaging and Biosensing Using Near-Infrared Fluorescence file
216 2022-10-04 16:00  E6 #2501  Distinguishing 6d (1, 0) SCFTs
215 2023-11-15 16:00  E6-6, #119  Quantum hydrodynamic theory for plasmonics: from molecule-coupling to nonlinear optics
214 2016-03-07 16:00  E6, 1501  Physics Colloquium : 2016 Spring file
213 2019-09-18 16:00  Seminar Room #1323  Fall 2019: Physics Seminar Serises file
212 2023-03-30 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  Detecting axions with chiral magnetic effects file
211 2019-02-21 16:00  #5313, E6-2  B-meson charged current anomalies - Theoretical status file
210 2023-11-01 16:00  E6-2, #2502  [High Energy Theory Seminar] Modular functions and 3D N=4 rank-zero superconformal field theories
209 2022-09-21 16:00  College of Natural Science E6-2, Rm. 1323  Materials and Device Nanofabrication of Optical Metasurfaces file
208 2023-03-27 15:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  A coherent mechanical oscillator pumped by a suspended quantum dot file