We employ graphene saturable absorption for the theoretical demonstration of mirrors based on planar silicon photonic Bragg gratings. Two geometries are investigated, that a wire grating and slot grating, showcasing increased light-matter interaction high-confinement waveguide. The gratings designed in linear regime single mode operation, low footprint broadband operation near infrared optical ...

In this paper, the high-repetition-rate passively Q-switched (PQS) and femtosecond continuous-wave mode-locked (CWML) lasers are successfully obtained with 2D black arsenic-phosphorus (b-AsP) nanosheets as saturable absorber (SA) at 1 μm for first time, to best of our knowledge. The absorption properties ultrafast carrier dynamics b-AsP SA explored by Z-scan pump-probe techniques. Moreover, acc...

The Tungsten disulfide atomic layer has enormous scientific merits that play a key role in the nonlinear absorption process. Four distinct excitonic peaks spectra are crucial for identifying polarity of by virtue resonant or non-resonant excitation source 532 nm is enough one-photon optical transition at both low-energy and two-photon higher-energy peaks. exhibited reverse saturable (or positiv...

Pulsed lasers have wide applications in several fields, such as basic research, telecommunications, and industrial materials processing. A saturable absorber (SA) is a key component for pulse laser generation. However, the current SAs exhibit certain limitations. Hence, developing new nonlinear optical generation significantly important ultrafast photonics related applications. Metallic nanomat...

Graphene is a single-atom-thick layer of carbon atoms in a honeycomb lattice. It is currently a popular material for study in condensed matter physics and related fields [1-6]. The material has a large number of proposed potential applications including integrated photonic devices. Saturable absorption and photocurrent generation has already been successfully demonstrated [1,2]. We aim to study...

Passive Q switching of solid-state lasers is usually accomplished with organic dyes or color centers as the saturable absorber. Dyes, however, have poor thermal stability and tend to degrade rapidly. To operate in cw-pumped lasers, dyes require a circulation system. Color centers, such as the color-center LiF crystal, -3 exhibit a fading phenomenon that may limit the period of reliable operatio...