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Researchers propose that a cold atom in a one-dimensional photonic crystal waveguide can form a cavity. This system should allow interaction with other atoms within the effective cavity length.
A quantum memory based on a Raman scheme is implemented for photonic qubits encoded in the path and polarization of single photons. The performance is quantified before and after storage in cold atomic ensembles and the storage bandwidth is ∼140 MHz.
Researchers exploit the strong dependence of gap-plasmon phase velocity on gap width to make a compact phase-modulator. An electromechanically variable gap size enables a 23-μm-long non-resonant modulator with moderate losses.
Warm dense matter (WDM), which falls in the category between plasmas and condensed matter, is expected to exist in planetary interiors. Now, researchers use an X-ray laser to observe the transition to WDM.
Using the collective accumulation of single-scattered waves, scientists manage to image deep within a scattering medium, achieving an imaging depth 11.5 times the scattering mean free path and a near-diffraction-limit resolution of 1.5 µm.
A gated multilayer black phosphorus photodetector integrated on a silicon photonic waveguide operating in the telecom band is demonstrated with intrinsic responsivity up to 135 mA W−1 and 657 mA W−1 in 11.5-nm- and 100-nm-thick devices, respectively.
The authors experimentally and theoretically demonstrate stimulated Brillouin scattering in a silicon nanowire supported by a pillar, which results from the tight confinement of both photons and phonons.
A low-loss ZBLAN micro-structured fibre is used to generate a supercontinuum spanning from the UV to the mid-IR (200 nm–2,500 nm). The material has high resistance even after extended operation and can withstand large spectral power densities.
Microcavity polaritons—the bosonic quasiparticles that result from strong light–matter coupling—are observed for the first time in a dielectric cavity containing a monolayer of molybdenum disulphide at room temperature.
The authors observe electron interference using the Auger electron emitted from an O2 molecule ionized by a soft X-ray photon. The interference disappears when the location of the O+ can be determined from the final state observed.
Solution-processed small-molecule solar cells with almost 100% internal quantum efficiency and a power conversion efficiency of 9% are reported. The cells make use of a donor molecule called DRCN7T and use PC71BM as an acceptor.
The authors report a semiconductor injection laser with a continuous wave emission spanning more than one octave, from 1.64 THz to 3.35 THz, with optical powers in the milliwatt range and more than 80 modes above threshold.