No one likes a flickering light source, but lighting is often dependent on the quality of a building’s main AC power. Light intensity has a close relation to the supply voltage, but bulb type plays a ...

A designer who uses a phototransistor to convert a modulated optical signal to an electrical signal frequently encounters problems when high-intensity background light saturates the phototransistor.

A single phototransistor mimics retinal bipolar cell function while detecting visible and infrared light, enabling low-power ...

What if ultrafast pulses of light could operate computers at speeds a million times faster than today's best processors? A team of scientists, including researchers from the University of Arizona, are ...

Particular interest has been on semiconducting materials, such as molybdenum disulfide (MoS2), an abundant material in nature, which exhibits the unique physical, optical and electrical properties ...

Researchers in Taiwan say they have created a new chlorophyll-coated graphene phototransistor that is much more sensitive to light than devices made of pure graphene. The researchers believe that the ...

WEST LAFAYETTE, Ind. – Researchers have solved a problem hindering development of highly sensitive optical devices made of a material called graphene, an advance that could bring applications from ...

In 1948, Dr John Northrup Shive was developing transistor-like devices when he tried to use a beam of light instead of a wire as the emitter of a point contact transistor, which generated holes that ...

Researchers demonstrated a way to manipulate electrons in graphene using pulses of light that last less than one thousands trillionth (one quadrillionth) of a second. By leveraging a quantum effect ...