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Polarization-dependent losses shape Hong–Ou–Mandel interference of photon pairs in birefringent waveguides. Seamless tunability of indistinguishable photon coincidences, all the way from enhancement to full suppression, is enabled by an appropriate choice of the observation basis.
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.
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.
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.
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.
Photogalvanic effect in silicon nitride microresonators enables reconfigurable quasi-phase-matching for efficient and tunable second-harmonic generation.
