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.

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 ...

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

The applications of eye-tracking devices are endless, which is why we always get excited to see new techniques in measuring the absolute position of the human eye. Cornell students [Michael and John] ...

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 ...

The schematic diagram of the ultra-sensitive optical immunoassay platform, which comprises two pivotal components: one dedicated to establishing highly sensitive sandwich immunocomplexes for ...