Laser-based methodologies for synthesis, reduction, modification and assembly of graphene-based materials are highly demanded energy-related electrodes devices portable electronics. Laser technologies graphene synthesis exhibit several advantages when compared to alternative methods. They fast, low-cost energy saving, allowing selective heating programmable processing, with controlled manipulat...

The ideal edges of bilayer graphene (BLG) are that the edges of the top and bottom graphene layers (GLs) of BLG are well-aligned. Actually, the alignment distance between the edges of the top and bottom GLs of a real BLG can be as large as the submicrometer scale or as small as zero, which cannot be distinguished using an optical microscope. Here, we present a detailed Raman study on BLG at its...

The deformation of monolayer graphene, produced by chemical vapor deposition (CVD), on a polyester film substrate has been investigated through the use of Raman spectroscopy. It has been found that the microstructure of the CVD graphene consists of a hexagonal array of islands of flat monolayer graphene separated by wrinkled material. During deformation, it was found that the rate of shift of t...

Currently there are about 2 billion image sensors in the market and that number rapidly increasing. We also observe that the rate at which the number of cameras in mobile phones is increasing is far greater than the rate at which the number of stand-alone digital still cameras is increasing. A pertinent question to ask is: “Will stand-alone digital cameras become obsolete in the future?” Learni...

Articles you may be interested in Increase of the grating coupler bandwidth with a graphene overlay Appl. Numerical modeling of a table-top tunable Smith–Purcell terahertz free-electron laser operating in the super-radiant regime Appl.

We report the femtosecond laser propagation in a hybrid graphene/silicon ridge waveguide with demonstration of the ultra-large Kerr coefficient of graphene. We also fabricated a slot-like graphene/silicon ridge waveguide which can enhance its effective Kerr coefficient 1.5 times compared with the graphene/silicon ridge waveguide. Both transverse-electric-like (TE-like) mode and transverse-magne...

This study intends to stimulate growth of graphene using carbon dioxide laser ablation in varying environments. Silicon carbide wafers will provide the medium for graphene production. Wafers will be ablated in three different environments: a near vacuum, at atmospheric pressure in the presence of argon gas, and at atmospheric pressure in the presence of helium, noting that all circumstances kee...

The increased utilization of high power laser sources has rendered great challenges for designing effi cient optical limiting (OL) materials to protect human eyes and various delicate optical devices. An ideal optical limiter should greatly attenuate an intense laser beam while exhibiting high transmittance for low-input optical intensity. [ 1 ] Up to now, numerous organic and inorganic materia...

The recent development of the internet things (IoT) raises new needs in energy storage micro-devices to power implantable and wearable applications. Conventional battery components, including electrode materials current collectors, have be miniaturized integrated onto flexible substrates while keeping their electrochemical performance. Although numerous micro-fabrication processes were successf...

Nonlinear scattering, originating from laser induced solvent micro-bubbles and/or micro-plasmas, is regarded as the principal mechanism for nonlinear optical (NLO) response of graphene dispersions at ns timescale. In this work, we report the significant enhancement of NLO response of graphene dispersions by decreasing the atmospheric pressure, which has strong influence on the formation and gro...