Abstract Anisotropic effect of two-dimensional materials remains one the most attractive properties, introducing an additional degree freedom for tuning physical performances. In this work, we investigate anisotropies electronic, transport, piezoelectric, and optoelectronic properties Janus In2XY (X/Y = S, Se, Te) monolayers (J-In2XY MLs) by performing first-principles calculations. We find tha...

The ability to detect light over a broad spectral range is central to several technological applications in imaging, sensing, spectroscopy and communication. Graphene is a promising candidate material for ultra-broadband photodetectors, as its absorption spectrum covers the entire ultraviolet to far-infrared range. However, the responsivity of graphene-based photodetectors has so far been limit...

enous at 3 P.M. but have no appetite when suppertime rolls around. You wake up at 4:00 in the morning and cannot get back to sleep. This scenario is familiar to many people who have flown from the East Coast of the U.S. to California, a trip that entails jumping a three-hour time difference. During a weeklong business trip or vacation, your body no sooner acclimatizes to the new schedule than i...

Hopping transport associated with the granular nature of nanocrystal arrays has led to thought that nanocrystal-based devices might be incompatible fast operation. Here, we explore design HgTe sensors operating in short-wave infrared and a very time response down few nanoseconds. To reach this goal, relies on planar geometry reduce device capacitance. A strong in-built electric field is tailore...

Deep ultraviolet (DUV) photodetectors (PDs) based on ultrawide bandgap β-Ga2O3 have great potential for aerospace, military, and civilian applications, especially because of their inherent solar blindness. An 8 nm thick Sn-doped polycrystalline semiconductor is used as the channel material a solar-blind PD in this study. The fully depleted by upward bending energy band owing to work function di...

Photoplethysmography is a simple measurement of the variation in blood volume in tissue. It detects the pulse signal of heart beat as well as the low frequency signal of vasoconstriction and vasodilation. The transmission type measurement is limited to only a few specific positions for example the index finger that have a short path length for light. The reflectance type measurement can be conv...