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Superconducting nanowire single-photon detectors offer outstanding performance, but the development of large-format imaging arrays is challenging. A new approach based on sectioning a single nanowire enables an eightfold improvement of the spatial resolution and the realization of a 1,024-pixel imager.
A photodetector responding to only circularly polarized light is developed. It has a ring-shaped form, consisting of plasmonic nanostructures on a graphene sheet. Its zero-bias responsivity and detectivity of ellipticity in the mid-infrared at room temperature are 392 V W−1 and 0.03° Hz−1/2, respectively.
Circularly polarized light emitted from OLEDs exhibits opposite handedness depending on the propagation direction of the light. Switching the current flow in the OLED also switches the light handedness.
Researchers demonstrate a laser-plasma accelerator-driven free-electron laser in a seeded configuration, where control over the radiation wavelength and longitudinal coherence are achieved.
A multi-view reflector microscope based on polarization modulation and pupil splitting enables single-molecule orientation-localization microscopy with precisions of 10.9 nm and 2.0°.
The intrinsic Kerr nonlinearity in ring resonators is exploited to demonstrate passive isolation of a continuous-wave laser. Up to 35-dB isolation with 5-dB insertion loss was achieved on-chip.
The free-carrier dispersion effect with photo-excited free carriers provides all-optical control of the resonance of photonic crystal microcavities. Using this technique, a spatial light modulator comprising optically addressed cavity arrays has been developed for high-efficiency, high-bandwidth spatiotemporal modulation of light.
The 2022 Nobel Prize in Physics celebrates the profound impact of quantum entanglement, which underpins many modern quantum technologies such as quantum cryptography and computing.
Experimental confirmation that the Gouy phase can modify the photonic de Broglie wavelength opens up many exciting directions in metrology using quantum systems with higher-order Gaussian modes.
Suppression of exciton–vibration coupling yields organic light-emitting diodes that emit at 1,000 nm in the NIR-II spectral region, which is important for biological imaging.
Panuski et al. demonstrate a programmable photonic crystal cavity array, enabling the spatiotemporal control of a 64 resonator, two-dimensional spatial light modulator with nanosecond- and femtojoule-order switching.
It is shown that CsPbBr3 nanocrystals exhibit good radiation hardness for high γ-radiation doses, as high as 1 MGy. Electron trapping in surface defects limits scintillator applications, but is shown to be suppressed by surface fluorination treatment.
The accurate identification of the three-dimensional quantitative shape of a cell nucleus is now possible without fluorescent staining by applying computational segmentation to refractive index tomograms recorded in the flow cytometry mode.