UWB fastly-tunable 0.5-50 GHz RF transmitter based on integrated photonics

In the last decade, the interest in software-defined ultra-wideband (UWB) and tunable radio frequency (RF) apparatuses with low size, weight, and power consumption (SWaP), has grown dramatically, pushed by the new 6G vision where, RF equipment shall enable a large number of fundamental applications as UWB communications, robot localization mapping and control and high precision radars, all of them contributing in revolutionizing our life style. Unfortunately, the coexistence of ultra-wideband and software-defined operation, tunability and low SWaP represents a big issue in the current RF technologies. In this article, to the best of our knowledge, the first example of a complete tunable software-defined RF transmitter with low footprint (i.e. on photonic chip) is presented exceeding the state-of-the-art for the extremely large tunability range of 0.5-50 GHz without any parallelization of narrower-band components and with fast tuning (<200micros). This first implementation, represents a breakthrough in microwave photonics.

Controllable sign reversal of Seebeck coefficient and the large tunability of ZT value of plumbene: a first-principles study

When the Fermi level is shifted to the nearby van Hove singularity by electron doping from its intrinsic position, the ZT value (figure of merit) of the high-buckled plumbene at 100 K is increased by about 250 times.

InSe: a two-dimensional material with strong interlayer coupling

Interlayer coupling in atomically thin, two-dimensional indium selenide (InSe) may have a significant impact on its properties, including large tunability in the band gap, height of band-edge state, phonon frequency, and high carrier mobility.

Large tunability in the mechanical and thermal properties of carbon nanotube-fullerene hierarchical monoliths

With systematic design, hierarchical three-dimensional carbon based nano-truss structures can possess large tunability in their mechanical and thermal properties.