Picosecond electrical switching of single-gate metal nanotip arrays

Optical switching in metal-slit arrays on nonlinear dielectric substrates.

We propose a scheme for an optical limiter and switch of the transmitted light intensity in an array of subwavelength metallic slits placed on a nonlinear Kerr-type dielectric substrate of finite thickness, where the geometrical parameters are designed for operation at telecom wavelengths. Our approach is based on the abrupt changes of the output light intensity observed in these systems near t...

Picosecond Electrical Wavefront Generation and Picosecond Optoelectronic Instrumentation

While electronic components have been demonstrated over narrow bandwidths at millimeterwave frequencies, electronic components for broadband and pulse applications have shown much poorer performance. This discrepancy in performance between pulse and narrowband circuits also applies to the related instrumentation. This thesis describes the development of picosecond electronic devices and the rel...

Metal nanoparticle fluids with magnetically induced electrical switching properties.

We report the successful preparation of solvent-free metal nanoparticle (NP) fluids with multiple-functionalities, such as rheological properties, magnetism, ionic conductivity, and electrical properties, allowing for facile synthesis and mass production. The gold nanoparticles (AuNPs) used in this study were synthesized using tetraoctylammonium bromide (TOABr) in toluene and then directly phas...

Nanoparticle Necklace Network Arrays Exhibiting Room Temperature Single-Electron Switching

Ultrafast magnetization reversal by picosecond electrical pulses

The field of spintronics involves the study of both spin and charge transport in solid-state devices. Ultrafast magnetism involves the use of femtosecond laser pulses to manipulate magnetic order on subpicosecond time scales. We unite these phenomena by using picosecond charge current pulses to rapidly excite conduction electrons in magnetic metals. We observe deterministic, repeatable ultrafas...