Articles in 2023

Micro-light-emitting diodes — microLEDs — could be used to create the next generation of displays, for use in smartwatches and augmented reality devices, if various fabrication issues can be addressed.

Oxide-based solid-state protonic electrochemical transistors that have symmetric operation and are compatible with CMOS technology can be used to create crossbar arrays for deep learning applications.

A millimetre-wave dual-rail resonator that is incorporated into a suspended lithium niobate resonator can provide efficient electromechanical transduction in the sub-terahertz regime.

Micro-light-emitting-diode display applications are growing quickly as technology companies begin to use them in a range of products. Key to the development of these applications was the miniaturization of gallium nitride light-emitting diodes. Hongxing Jiang and Jingyu Lin recount how this was achieved.

The Curie temperature of Fe_5+xGeTe₂ thin films can be modulated from 260 to 380 K via iron doping, allowing the two-dimensional material to be used to create planar spiral inductors and low-pass Butterworth filters.

By selectively engineering the surface roughness of micro-light-emitting-diode chips, and thus the strength of the van der Waals forces that bond them to a substrate, large-area displays can be created via a fluidic-assisted transfer method.

Magnetic meta-atoms made from lanthanum-doped barium hexaferrite can be used to create self-biased non-reciprocal metasurfaces capable of unidirectional transmission, non-reciprocal beam steering, non-reciprocal beam focusing and non-reciprocal holography.

An organogel that is based on poly(vinyl alcohol)–sodium borate and contains a percolating conductive network of silver particles and liquid metal microdroplets exhibits spontaneous mechanical and electrical self-healing, as well as an electrical conductivity of 7 × 10⁴ S m⁻¹.

Magnetic hysteresis in multiferroic heterostructures formed from the two-dimensional magnetic insulator chromium germanium telluride and a thin ferroelectric polymer can be electrically controlled with voltages of around 5 V.

This Review examines the development of cryogenic memory technologies—including non-superconducting memories, superconducting memories and hybrid memories—and their potential application in superconducting single-flux quantum circuits and quantum computers.

Brain–computer interfaces are our 2023 technology of the year.

Fifty years after the term brain–computer interface was coined, the neurotechnology is being pursued by an array of start-up companies using a variety of different technologies. But the path to clinical and commercial success remains uncertain.