Volume 15 Issue 11, November 2021

Quantum teleportation is demonstrated between light and the vibrations of a nanomechanical resonator, realizing a key capability for quantum computing.

Practical on-chip optical isolators providing non-reciprocal propagation are still a challenge. Now, two independent groups show that a phonon-mediated break of the chiral symmetry in waveguide resonators may offer a solution.

The stabilization of perovskite nanocrystals (PeNCs) by a surrounding metal–organic framework (MOF) results in a simple yet effective way to make extraordinarily bright PeNC-based LEDs, with stable continuous operation of up to tens of hours.

A special perovskite material design is demonstrated to operate as a wideband, achromatic quarter-wave plate.

This Review summarizes the latest state-of-the-art technologies for high-speed multiphoton (fluorescence) microscopy, especially at kilohertz 2D frame rate, and 3D video rate or beyond—a speed regime that was generally inconceivable until very recently, as well as the prospects and challenges of these emerging technologies.

Perovskite crystals of Cs₄PbBr₆ embedded with CsPbBr₃ nanocrystals are shown to act as wideband, achromatic waveplates in the visible and near-infrared regions.

Quantum teleportation of a photonic qubit into mechanical modes of two silicon photonic crystal nanobeams is demonstrated. It allows to store and retrieve an arbitrary qubit state onto a dual-rail encoded long-lived optomechanical quantum memory.

Non-magnetic optical isolators are demonstrated using phonon-mediated photonic Autler–Townes splitting. The on-chip lithium niobate devices simultaneously achieve ultralow insertion loss and high contrast.

An electrically driven, magnetic-free optical isolator is demonstrated. The device, based on aluminium nitride piezoelectric modulators and a silicon nitride microring resonator, may be useful for integrated lasers and other opto-electric systems.

All-optical modulation of second-harmonic generation in a monolayer molybdenum disulfide with a modulation depth of close to 100%, and speed limited only by the fundamental pulse duration, is achieved thanks to the crystal symmetry and the deep subwavelength thickness of the sample.

The use of metal–organic frameworks helps protect perovskite nanocrystals, resulting in bright, stable light-emitting diodes.

Quantum photonic integrated circuits for a standalone quantum secure communication system are developed and packaged into pluggable interconnects. The system is interfaced with 100 Gb s^–1 data encryptors and its performance is evaluated over 10 km to 50 km fibre links.

Parametric driving of Kerr solitons – cavity soliton excitation around twice the carrier frequency of solitons – in an optical parametric oscillator with competing nonlinearities look prone to extend the applications of Kerr resonators to random number generators and Ising machines.