Volume 16 Issue 11, November 2022

The use of on-chip nonlinear waveguides that can convert 1.5-μm wavelength signals into the 2-μm region brings new opportunities for expanding the bandwidth of optical communications.

Ultrasound-induced gas bubbles in tissue can temporarily minimize optical scattering, enabling laser light to be focused at greater depth for higher-resolution imaging.

Several research groups have now succeeded in achieving lasing in free-electron lasers (FELs) driven by compact plasma wakefield accelerators. In the future, the approach may ultimately lead to a new breed of much smaller, more affordable FELs.

Organic LEDs based on acceptor–donor–acceptor molecules Y11, IDSe-4Cl and COTIC-4F are shown to be highly effective emitters of short-wave infrared light.

Optical clearing based on ultrasound-induced gas bubbles offers new opportunities for deeper laser scanning microscopy of biological tissue.

In-fibre second-harmonic generation is demonstrated in all-silica optical fibres by growing MoS₂ monolayers directly onto the fibre’s core.

Researchers show that resonant coupling of light pulses with excitonic transitions affects the optimal time difference between pulses for sum-frequency generation and four-wave mixing in monolayer WSe₂.

High-speed, high-resolution optics-based printing typically requires femtosecond pulsed lasers. We demonstrate optical printing using indigo-blue laser diodes and a red continuous-wave laser, achieving a peak printing rate of 7 × 10⁶ voxels s^–1 at a voxel volume of 0.55 µm³.

Indirect-bandgap transition lasing, even under continuous-wave excitation at room temperature, is demonstrated in an ultra-thin WS₂ disk.

A microcomb source based on a silicon nitride ring resonator is shown to support petabit-per-second data transmission over a multicore optical fibre.

Green OLEDs based on BNSeSe offer high operational efficiency and reduced efficiency roll-off.