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The news that third-harmonic Mie scattering from nanoscale helices of cadmium telluride is strongly influenced by the chirality of the scatterers opens new opportunities for high-throughput analysis of chiral compounds using very small sample volumes.
Nanoscale helix-shaped structures of CdTe are shown to exhibit strong nonlinear chiral effects that could prove useful for high-throughput chemical analysis.
An off-the-shelf silicon image sensor can directly record few-cycle optical waveforms in the mid-infrared in a single shot by employing tunnelling ionization as a temporal gate.
Researchers reveal an effect in random media, called coherent back-emission, in which directional memory of the incoming light field persists after incident radiation ceases to be present.
Waveforms of mid-infrared few-cycle optical pulses are captured in a single shot by measuring nonlinear photocurrents in a Si-based image sensor chip. The temporal resolution of waveforms is determined by the spatial resolution of the image sensor.
Researchers demonstrate the transfer of photons from one storage nanocavity into another by applying a voltage pulse. A transfer efficiency of 76% is achieved.
Third-harmonic Mie scattering optical activity from suspensions of semiconductor (CdTe) nanostructured helices is observed, opening ways for chiroptical characterization of semiconductor and other chiral non-metallic particles in volumes potentially of the order of 10–17 m3.
Photogalvanic effect in silicon nitride microresonators enables reconfigurable quasi-phase-matching for efficient and tunable second-harmonic generation.
A theoretical study of the time dependence of backscattering enhancements is presented, where strongly scattering media present a directional memory for time-varying signals even when the direct input signal has long decayed, providing opportunities for controlling the energy storage in interfaces and release of energy in random media for memory or enhanced coupling applications.
Twin-field (TF) quantum key distribution (QKD) over a secure distance of 833.8 km is demonstrated even in the finite-size regime. To this end, an optimized four-phase TF-QKD protocol and a high-speed low-noise TF-QKD system are developed.
The formation of ultra-short dissipative quadratic solitons is realized using optical parametric amplification at low pump energies and in the presence of substantial temporal walk-off between the pump and signal.