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Dielectric antennas and metasurfaces open up new opportunities for future applications in advanced optoelectronics, light detection and ranging for autonomous vehicles, fluorescence-enhancing substrates for bioimaging and many more.
Yaron Silberberg of the Weizmann Institute in Israel passed away in April. Here, some of his former students and friends remind us of who Yaron was: a creative researcher and a mentor without ego with major achievements in nonlinear optics, microscopy and quantum physics.
Blue light-emitting diodes based on perovskite nanostructures embedded within quasi-two-dimensional phases show highly effective charge injection and suppressed non-radiative recombination.
By synthesizing undistorted cross-sectional image reconstructions from multiple conventional images acquired with angular diversity, optical coherence refraction tomography offers greater than threefold improvement in lateral resolution and speckle reduction in imaging tissue ultrastructure, and reconstructs the tissue’s internal refractive index distribution.
Following excitation with a resonant laser, on-demand generation of non-classical light states in photon-number superpositions of zero-, one- and two-photon Fock states is demonstrated from a GaAs-based cavity containing InAs quantum dots.
Acousto-optical interactions within integrated optics platforms are reviewed with a discussion of the useful chip-based devices such as lasers, amplifiers, filters, isolators and more besides that can result.
A thermodynamical framework for multimode nonlinear optical systems is presented. The new understanding may lead to next-generation high-power multimode optical structures.
A hybrid material based on uniform graphene on both the outer surface and inner hole walls of a photonic crystal fibre offers a strong, tunable light–matter interaction and good broadband electro-optic modulation performance under low gate voltage.
Lasers based on Landau levels, which should offer wide wavelength tunability, including across the elusive THz range, are a step closer to reality with a demonstration showing how to suppress the main loss mechanism.
A sender and a receiver for continuous-variable quantum key distribution are packed onto separate silicon photonic chips. By using an external 1,550-nm laser, a secret key rate of 0.14 kbps is transmitted over a simulated distance of 100 km in fibre.
Single-photon sources with a single-photon efficiency of 0.60, a single-photon purity of 0.975 and an indistinguishability of 0.975 are demonstrated. This is achieved by fabricating elliptical resonators around site-registered quantum dots.
By using an ultrastable oscillator based on a cryogenic Si cavity, the fractional instability of two Sr optical lattice clocks at 1 s reaches 4.8 × 10−17 and 3.5 × 10−17 through anti-synchronous and synchronous comparisons, respectively.
Increased bandwidth and fluctuations are hurdles on the path towards generating intense fully coherent X-ray free-electron laser output. A recent experiment at FERMI Trieste demonstrated that these difficulties can be overcome by an approach called echo-enabled harmonic generation.
The Shockley–Queisser model is a landmark in photovoltaic device analysis by defining an ideal situation as reference for actual solar cells. However, the model and its implications are easily misunderstood. Thus, we present a guide to help understand and to avoid misinterpreting it.
As a pioneer in the research on ultra-high-quality dielectric microresonators and their applications in nonlinear optics, frequency metrology and laser science, Mikhail Gorodetsky is badly missed.
Modulation of light by external waves is an essential function in any photonics-based system. Using an integrated plasmonic approach, the speed of modulation of 1.55-μm waves has now been extended to the ‘low’ THz band.
Judicious scaling of the waveguide properties of a simple hollow capillary fibre filled with helium allows for powerful pulse temporal compression down to the sub-femtosecond level, further enabling the efficient generation of ultrafast ultraviolet light.
