The rate at which photoreceptors recover from excitation is thought to be critical for setting the temporal resolution of vision. Indeed, mutations in RGS9 (regulator of G-protein signaling 9) and R9AP (RGS9 anchor protein) proteins mediating rapid photoresponse recovery impair patients' ability to see moving objects. In this study, we analyzed temporal properties of retinal sensitivity and spa...

Due to the large surface area-to-volume ratio and high quality crystal structure, single nanowire (NW)-based UV sensors exhibit very high on/off ratios between photoresponse current and dark current. Practical applications require a large-scale and low-cost integration, compatibility to fl exible electronics, as well as reasonably high photoresponse current that can be detected without high-pre...

We report the fabrication and photoresponse of 5nm thick La1.85Sr0.15CuO4 nanostrip with a width of 100nm. The I-V characteristics of the nanostrip show a hysteresis and a sharp voltage jump at Ic. The Jc(3K) of the nanostrip is 2.3 × 10 A/cm. The nanostrip exhibits photoresponse signals when illuminated by a pulse laser at 1560 nm wavelength with a bias current just below Ic. The height of the...

Photoresponse Enhancement Huge enhancement in photoresponse is achieved by modulating the surrounding dielectric environment of a silicon-monolayer MoS2 heterostructure. Reduced charge carrier scattering along with lower binding energy excitons presence high contribute to this as reported article number 2102054 Vrinda Narayanan P., Atikur Rahman, and co-workers.

Cone photoreceptor subtypes having different spectral sensitivities exhibit different recovery kinetics in their photoresponses in some vertebrates. Phosphorylation by G protein-coupled receptor kinase (GRK) is essential for the rapid inactivation of light-activated visual pigment, which is the rate-limiting step of the cone photoresponse recovery in salamander. In this study we compared the ra...

We report observation of high-Q resonance in the photoresponse of a detector embedded in the 2D photonic crystal slab (PCS) microcavity illuminated by terahertz radiation. The detector and PCS are fabricated from a single GaAs wafer in a unified process. The influence of the period of PCS lattice, microcavity geometry, and detector location on the resonant photoresponse is studied. The resonanc...

We study photodetection in graphene near a local electrostatic gate, which enables active control of the potential landscape and carrier polarity. We find that a strong photoresponse only appears when and where a p-n junction is formed, allowing on-off control of photodetection. Photocurrents generated near p-n junctions do not require biasing and can be realized using submicrometer gates. Loca...

ZnO nanowires are normally exposed to an oxygen atmosphere to achieve high performance in UV photodetection. In this work we present results on a UV photodetector fabricated using a flexible ZnO nanowire sheet embedded in polydimethylsiloxane (PDMS), a gas-permeable polymer, showing reproducible UV photoresponse and enhanced photoconduction. PDMS coating results in a reduced response speed comp...

We report the realization of electron intraband absorption based middle~;5.6 mm! and long~;10 mm! wavelength infrared ~IR! photoresponse for normally incident radiation on InGaAs-capped GaAs~001!/InAs quantum dots ~QDs! in a n – i(QD) – n structure. The relative photoresponse in this dual-wavelength structure is tunable up to two orders of magnitude with bias. The full width at half maximum of ...

Nonresonant detection on terahertz radiation of field effect transistors by the influence of magnetic field is studied in this paper. The influence of the magnetic field upon the electron mobility in the transistor channel is discussed and the corresponding influence on the nonresonant detection photoresponse is analyzed in detail. Based on the work before, the numerical tool has been modified ...