Graphene, whose absorbance is approximately independent of wavelength, allows broadband light-matter interactions with ultrafast responses. The interband optical absorption of graphene can be saturated readily under strong excitation, thereby enabling scientists to exploit the photonic properties of graphene to realize ultrafast lasers. The evanescent field interaction scheme of the propagating...

Both helicity-independent and helicity-dependent all-optical switching processes driven by single ultrashort laser pulse have been experimentally demonstrated in ferrimagnetic alloys as GdFeCo. Although the has previously reproduced atomistic simulations, lack of a robust micromagnetic framework for ferrimagnets limits predictions to small nanosystems, whereas experiments are usually performed ...

We use an ultrafast electro-optic dual comb interferometer to perform single-point vibrometry on the submillisecond time scale. As an example, we resolve the vibration of an ultrasound speaker driven at 50 kHz, achieving a sub-nanometer axial resolution through a measurement of the optical phase carrier. OCIS codes: (320.7100) Ultrafast measurements; (120.6200); Spectrometers and spectroscopic ...

Very high frame rate ultrasound imaging has recently allowed for the extension of the applications of echography to new fields of study such as the functional imaging of the brain, cardiac electrophysiology, and the quantitative imaging of the intrinsic mechanical properties of tumors, to name a few, noninvasively and in real time. In this study, we present the first implementation of Ultrafast...

The buildup process of coherent structures and patterns from the composite balance between conservative dissipative effects is a universal phenomenon that occurs in various areas physics, ranging quantum mechanics to astrophysics. Dissipative solitons are highly solutions nonlinear wave equations, provide an excellent research platform for ultrafast transient phenomena. Herein, by taking advant...

We study the charge and spin dependent scattering in a set of CoFeB thin films whose crystalline order is systematically enhanced controlled by annealing at increasingly higher temperatures. Terahertz conductivity measurements reveal that transport closely follows development phase, with increasing structural leading to conductivity. The terahertz-induced ultrafast demagnetization, driven spin-...

Abstract The inverse Faraday effect is a magneto-optical process allowing the magnetization of matter by an optical excitation carrying non-zero spin light. This phenomenon was considered until now as symmetric; right or left circular polarizations generate magnetic fields oriented in direction light propagation counter-propagating direction. Here, we demonstrate that manipulating density plasm...

We demonstrate the folded ultrafast nonlinear interferometer (FUNI) as a 3R all-optical regenerator. Faraday rotation provides inherent polarization stabilization, and the optical fiber nonlinear medium provides ultrafast operation and switching window tunability. We demonstrate 3R regeneration of 10-Gbit/s data with 5-pJ pulse switching energy and 4-ps timing-jitter tolerance.

We report the generation of sub-picosecond modelocked pulses from an ultrafast laser inscribed Er-doped waveguide laser. 320 fs pulses at a repetition rate of 40 MHz and energy of 31 pJ were facilitated via passive modelocking by a carbon nanotube saturable absorber. Keywords-component; waveguide devices; ultrafast optics