OPENTECHNICAL PUBLICATION
OT-2026-000000398

Semiconductor-Graphene Heterojunction Quad-Detectors For Low-Power Laser Alignment

Published: 2026-09-15T19:02:50.229733Z
Permanent URL: https://opentechnical.org/p/OT-2026-000000398
Categories: Sensors, Controls & Machine Vision > Position and Presence Sensing

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ABSTRACT

A semiconductor-graphene heterojunction quad-detector pairs a semiconductor
material with curved graphene strips in a quad-cell design. Graphene has been
shown to have exceptional electrical properties that enhance the operation of
semiconductor photodetectors. These properties address limitations of current
semiconductor quad-cell devices by drastically increasing their sensitivity.
According to an aspect of the present disclosure, a position detector includes
a substrate having windows formed therein. Four graphene pads each having a
plurality of curved strips are formed on the substrate. Each of the plurality
of curved strips have a first end connected to a grounded conductor pad and a
second end connected to one of four signal conductor pads.

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OpenTechnical publication OT-2026-000000398
Published 2026-09-15T19:02:50.229733Z
https://opentechnical.org/p/OT-2026-000000398