Now showing items 1-10 of 52
All-fiber Yb-doped laser mode-locked by nanotubes
(IEEE Computer Society, 2013)
Single-wall carbon nanotubes (SWNTs) and graphene have emerged as promising saturable absorbers (SAs), due to their broad operation bandwidth and fast recovery times [1-3]. However, Yb-doped fiber lasers mode-locked using ...
Femtosecond pulse generation from an extended cavity Cr4+: Forsterite laser using graphene on YAG
A room temperature, multipass-cavity, femtosecond Cr4+:forsterite laser was modelocked with a single-layer graphene saturable absorber on a YAG substrate. The resonator produced nearly transform-limited 92 fs pulses near ...
Compressive sensing imaging with a graphene modulator at THz frequency in transmission mode
(IEEE Computer Society, 2016)
In this study we demonstrate compressive sensing imaging with a unique graphene based optoelectronic device which allows us to modulate the THz field through an array of columns or rows distributed throughout its face. © ...
Graphene mode-locked Cr:LiSAF laser at 850 nm
(OSA - The Optical Society, 2015)
We report, for the first time to our knowledge, a mode-locked femtosecond Cr:LiSAF laser initiated with a high-quality monolayer graphene saturable absorber (GSA), synthesized by chemical-vapor deposition. The tight-focusing ...
Broadband THz modulators based on multilayer graphene on PVC
(IEEE Computer Society, 2016)
In this study we present the direct terahertz time-domain spectroscopic measurement of CVD-grown multilayer graphene (MLG) on PVC substrate with an electrically tunable Fermi level. In a configuration consisting MLG and ...
One-step codoping of reduced graphene oxide using boric and nitric acid mixture and its use in metal-free electrocatalyst
In this study, the preparation of a highly efficient metal-free electrocatalyst, boron and nitrogen codoped reduced graphene oxide (BN-rGO), with an excellent durability is reported. The BN-rGO were prepared in one step ...
Graphene supercapacitor as a voltage controlled saturable absorber for femtosecond pulse generation
(Optical Society of American (OSA), 2014)
For the first time to our knowledge, we employed a graphene supercapacitor as a voltage controlled saturable absorber at bias voltages of 0.5-1V to generate 84-fs pulses from a solid-state laser near 1255 nm. © 2014 OSA.
Graphene Nanoreactors: Photoreduction of Prussian Blue in Aqueous Solution
(American Chemical Society, 2017)
Prussian dyes are characterized by interesting photomagnetic properties due to the photoinduced electron transfer involved in the Fe oxidation and spin state changes. Ferromagnetic Prussian blue (PB) in contact with titanium ...
Controlling phase of microwaves with active graphene surfaces
(American Institute of Physics Inc., 2017)
In this letter, we report a method to control the reflection phase of microwaves using electrically tunable graphene devices. The device consists of mutually gated large-area graphene layers placed at a quarter-wave distance ...
Femtosecond pulse generation from a Ti3+: Sapphire laser near 800 nm with voltage reconfigurable graphene saturable absorbers
(OSA - The Optical Society, 2017)
We experimentally show that a voltage-controlled graphene-gold supercapacitor saturable absorber (VCG-gold-SA) can be operated as a fast saturable absorber with adjustable linear absorption at wavelengths as low as 795 nm. ...