Optical physics articles from across Nature Portfolio

Precise measurements of the length of an Earth day are essential for understanding global mass transport phenomena. A ring laser gyroscope provides absolute measurements of variations in the length of the day with a resolution of 5 parts per billion over a 14-day period.

Here, the authors use tip-enhanced photoluminescence spectroscopy to show a discontinuity of the exciton density distribution on each side of the interface of a MoSe₂/WSe₂ lateral heterostructure. They introduce the concept of ‘exciton Kapitza resistance’ by analogy with the interfacial thermal resistance known as ‘Kapitza resistance’.

Here the authors demonstrate the active control of an all-optical switch harnessing the interaction of light with the constituent materials. The response speeds up by two orders of magnitude and scales accordingly with the strength of the light matter interaction.

Mode-pairing quantum key distribution (MP-QKD) is a potential protocol. Here the authors analyze the finite-key effect for the MPQKD protocol with rigorous security proof against general attacks. And they propose a six-state MP-QKD protocol and analyze its finite key effect.

Lanthanide-doped inorganic nanocrystals are promising for optical imaging and biomedical applications. Here authors show that interstitial H⁺ doping-induced crystal-field perturbation enhances the photoluminescence intensity of lanthanide-doped inorganic nanocrystals.

Accelerated electron beams are potentially useful for imaging and different type of light sources. Here the authors demonstrate electron acceleration using metallic laser acceleration with efficiency comparable to that of dielectric laser accelerators.

The time correlation between primary electrons and the secondary particles in electron microscopies encloses information of the whole interaction and excitation dynamics. The authors introduce time-correlated electron and photon counting microscopy that acts as a universal analysis approach for photon generation processes and arbitrary emitters.

Precise measurements of the length of an Earth day are essential for understanding global mass transport phenomena. A ring laser gyroscope provides absolute measurements of variations in the length of the day with a resolution of 5 parts per billion over a 14-day period.

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