We present a detailed investigation of the temperature T dependence of photoresponse of voltage tunable two-color quantum-well infrared photodetectors (QWIPs) that are based on the transfer of electrons between coupled QWs under an applied bias Vb. For T 6 40 K, the peak detection wavelength switches from 7.2 lm under positive bias to 8.6 lm under large negative bias as electrons are transferre...

We present a simple model to describe multiphoton transitions between the quasi-bound states of a currentdriven Josephson junction. The transitions are induced by applying an ac voltage with controllable frequency and amplitude across the junction. The voltage induces transitions across the junction when the frequency satisfies n = E10, where E10 is the splitting between the ground and first ex...

A frequency magnetically tunable perfect absorber based on graphene in the terahertz (THz) region is proposed. The performance analysed using 4 × transfer matrix method, demonstrating that absorption of proposed for a left-handed circularly polarized (LCP) wave can be dynamically tuned by varying external static bias magnetic field three ranges (0.95–2.2 THz, 4.15–5.4 and 7.3–8.55 THz). Due to ...

Remote sensing of sun induced fluorescence (SIF) in absorption bands is based on the analysis of the changes in atmospheric absorption features between reflected and incident sunlight. Indeed, chlorophyll fluorescence increase the reflected light in the same amount insight and outside the absorption features, thus reducing the apparent depth of bands. However, incoming light is a mixture of dir...

the field of cognitive psychology has increasingly provided scientific insights to explore how humans are subject to unconscious sources of evidentiary bias, leading to errors that can affect judgement and decision-making. increasingly these insights are being applied outside the realm of individual decision-making to the collective arena of policy-making as well. a recent editorial in this jou...