Self-rolling and light-trapping in flexible quantum well-embedded nanomembranes for wide-angle infrared photodetectors.

ABSTRACT: Three-dimensional (3D) design and manufacturing enable flexible nanomembranes to deliver unique properties and applications in flexible electronics, photovoltaics, and photonics. We demonstrate that a quantum well (QW)-embedded nanomembrane in a rolled-up geometry facilitates a 3D QW infrared photodetector (QWIP) device with enhanced responsivity and detectivity. Circular geometry of nanomembrane rolls provides the light coupling route; thus, there are no external light coupling structures, which are normally necessary for QWIPs. This 3D QWIP device under tube-based light-trapping mode presents broadband enhancement of coupling efficiency and omnidirectional detection under a wide incident angle (±70°), offering a unique solution to high-performance focal plane array. The winding number of

SUBMITTER: Wang H 

PROVIDER: S-EPMC4982750 | biostudies-literature | 2016 Aug

REPOSITORIES: biostudies-literature