Rewritable nanoscale oxide photodetector

Abstract

Nanophotonic devices seek to generate, guide, and/or detect light using structures whose nanoscale dimensions are closely tied to their functionality. Semiconducting nanowires, grown with tailored optoelectronic properties, have been successfully placed into devices for a variety of applications. However, the integration of photonic nanostructures with electronic circuitry has always been one of the most challenging aspects of device development. Here we report the development of rewritable nanoscale photodetectors created at the interface between LaAlO3 and SrTiO3. Nanowire junctions with characteristic dimensions 2-3 nm are created using a reversible AFM writing technique. These nanoscale devices exhibit a remarkably high gain for their size, in part because of the large electric fields produced in the gap region. The photoconductive response is gate-tunable and spans the visible-to-near-infrared regime. The ability to integrate rewritable nanoscale photodetectors with nanowires and transistors in a single materials platform foreshadows new families of integrated optoelectronic devices and applications.

5 pages, 5 figures. Supplementary Information 7 pages, 9 figures

References in corpus (1)

• High Mobility in LaAlO3/SrTiO3 Heterostructures: Origin, Dimensionality and Perspectives

Cited by in corpus (22)

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• High mobility conduction at (110) and (111) LaAlO3/SrTiO3 interfaces
• "Water-cycle" mechanism for writing and erasing nanostructures at the LaAlO3/SrTiO3 interface
• Origin of two-dimensional electron gases at oxide interfaces: insights from theory
• Nanoscale Phenomena in Oxide Heterostructures
• Persistent photoconductivity in 2-dimensional electron gases at different oxide interfaces
• Tunable electron-electron interactions in LaAlO3/SrTiO3 nanostructures
• Photoresponse dynamics in amorphous-LaAlO${}_3$/SrTiO${}_3$ interfaces
• Superconducting LaAlO3/SrTiO3 Nanowires
• Anomalous Transport in Sketched Nanostructures at the LaAlO3/SrTiO3 Interface
• Anisotropic electrical resistance in mesoscopic LaAlO${}_3$/SrTiO${}_3$ devices with individual domain walls
• Metal/SrTiO${}_3$ two-dimensional electron gases for spin-to-charge conversion
• Proposal of a one-dimensional electron gas in the steps at the LaAlO${}_3$-SrTiO${}_3$ interface
• Laterally-confined two-dimensional electron gases in self-patterned LaAlO3/SrTiO3 interfaces
• Gate-Tunable Optical Nonlinearities and Extinction in Graphene/LaAlO${}_3$/SrTiO${}_3$ Nanostructures
• Ultrafast Modification of the Polarity at LaAlO${}_3$/SrTiO${}_3$ Interfaces
• Direct Imaging of Sketched Conductive Nanostructures at the LaAlO3/SrTiO3 Interface
• Conducting and insulating LaAlO${}_3$/SrTiO${}_3$ interfaces: A comparative surface photovoltage investigation
• Surface charge writing and non-volatile control of superconductivity in LaAlO3/KTaO3(111) heterostructure
• Nonlocal Piezoresponse of LaAlO3/SrTiO3 Heterostructures
• Gate-Tunable Optical Extinction of Graphene Nanoribbon Nanoclusters
• Coupling between tilts and charge carriers at polar-nonpolar perovskite interfaces