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Silicon is the material of choice for modern microelectronics, whereas diamond is a luxurious gem. Now, researchers have demonstrated that silicon impurities in diamond can generate indistinguishable single photons — a requirement for quantum photonics and computing.
The demonstration of chalcogenide fibre-based supercontinuum sources that reach beyond a wavelength of ten micrometres is set to have a major impact on spectroscopy and molecular sensing.
Frequency combs based on quantum cascade lasers are a thriving topic of research and offer the attractive vision of more compact and higher performance comb systems for spectroscopy or metrology.
The advent of terahertz spectroscopy schemes that offer single-photon sensitivity, femtosecond time resolution and nanometre spatial resolution is creating new opportunities for investigating ultrafast charge dynamics in semiconductor structures.
Spatial hole burning typically decreases laser output but the effect can be manipulated by spatially tailored pump profiles to increase laser power-efficiency by orders of magnitude.
A network of four degenerate optical parametric oscillators (OPOs) is employed to find the ground state of the Ising Hamiltonian. The good performance of the network reveals the potential of OPOs for many similar problems.
Applying the mathematical concept of topology to the wave-vector space of photonics yields exciting opportunities for creating new states of light with useful properties such as unidirectional propagation and the ability to flow around imperfections.
Plasmonic nanostructures enable spontaneous emission enhancement factors of greater than 1,000 — the largest observed to date. The orientation of dipole emitters in nanogaps plays a vital role.
The authors report an experiment demonstrating fast control of the quantum dot–cavity coupling, indicating the coherent transfer of photons between the cavity and the quantum dot.
The authors demonstrate ultrabroadband time-resolved THz spectroscopy on a single InAs nanowire with 10 nm spatial resolution and sub-100 fs time resolution.
