Y. S. You
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Off-axis phase-matched terahertz emission from two-color laser-induced plasma filaments.
We observe off-axis phase-matched terahertz generation in long air-plasma filaments produced by femtosecond two-color laser focusing. Here, phase matching naturally occurs due to off-axis… Expand
Anisotropic high-harmonic generation in bulk crystals
High-harmonic generation in a solid turns out to be sensitive to the interatomic bonding — a very useful feature that could enable the all-optical imaging of the interatomic potential.
Laser waveform control of extreme ultraviolet high harmonics from solids.
Solid-state high-harmonic sources offer the possibility of compact, high-repetition-rate attosecond light emitters. However, the time structure of high harmonics must be characterized at the… Expand
Observation of backward high-harmonic emission from solids.
We experimentally demonstrate backward emission of high-harmonics of a near-infrared laser from MgO and Si crystals in the direction of specular reflection. We show that the variation of the… Expand
Orientation dependence of temporal and spectral properties of high-order harmonics in solids
Elliptically polarized terahertz generation in two-color laser filamentation
We observe terahertz polarization evolves from linear to elliptical with increasing plasma length. This ellipticity arises from successive polarization rotation of local THz plasma sources and the… Expand
Physical mechanism of terahertz generation in two-color photoionization
- Y. S. You
Title of Document: PHYSICAL MECHANISM OF TERAHERTZ GENERATION IN TWO-COLOR PHOTOIONIZATION Yong Sing You, Doctor of Philosophy, 2014 Directed By: Professor Ki-Yong Kim Institute for Research in… Expand
Generation of strong terahertz fields exceeding 8 MV/cm at 1 kHz and real-time beam profiling
We demonstrate high-field (>8 MV/cm) terahertz generation at a high-repetition-rate (1 kHz) via two-color laser filamentation. Here, we use a cryogenically cooled femtosecond laser amplifier capable… Expand
Intense terahertz generation in two-color laser filamentation: energy scaling with terawatt laser systems
We investigate high-power terahertz (THz) generation in two-color laser filamentation using terawatt (TW) lasers including a 0.5?TW, 1?kHz system, as well as 2 and 30?TW systems both operating at… Expand
Two-dimensional plasma current and optimized terahertz generation in two-color photoionization.
Two-dimensional (2-D) transverse photocurrent generation is studied and applied to control and optimize terahertz energy and polarization in two-color, laser-produced air filaments. A full control of… Expand