Kyung-Han Hong

Experimental Observations of the Relativistic Deflection of Light

Focusing several-cycle laser pulses to relativistic intensities in a lambda³ volume on plasma of ~lambda scale-length leads to deflection of the radiation. Spatio-spectral measurements at I=1.5times10¹⁸ W/cm² show relativistic deflection and spectral broadening

Enhanced soft-X-ray high-harmonic generation driven by mid-IR pulses mixed with their third harmonic

6th International Conference on Attosecond Physics, ATTO 2017, Xian, China, 2 Jul 2017 - 7 Jul 2017

160 mJ Energy, 100 Hz Repetition Rate Cryogenic Yb:YAG Composite Thin-Disk High Gain Amplifier

We report on a cryogenic composite thin-disk amplifier featuring ASE mitigation and 8-dB gain per bounce delivering up to 160 mJ energy diffraction-limited pulses with 5 ps transform-limited pulse duration at 100 Hz repetition rate.

High-Energy, Few-Cycle Pulses by Chirped-Pulse Cascaded Quadratic Compression

A new type of soliton-effect compression is proposed and demonstrated. Requiring only a quadratic crystal and high-energy 100-fs source, near-single-cycle durations are predicted, despite significant group-velocity-mismatch. Initial experiments generate 4.5-cycle pulses and bandwidths >500 nm.