Intriguing particles emerge when two photons couple

EurekAlert  March 2, 2021 An international team of researchers (UK, Russia) has reported a way to create quasiparticles that bind together two differently coloured particles of light. They have named these formations photon-photon polaritons. They tuned a laser to the specific resonance frequency where a photon is expected to be absorbed, yet no resonance absorption happened. Instead, the photon-photon interaction made up two new resonance frequencies away from the old one. The microresonator provided a whole set of split resonances, where each photon-photon pair displayed its own momentum and energy, allowing the researchers to apply the quasiparticle concept and calculate […]

Microresonators offer a simpler approach to sensing with light pulses

Science Daily  October 1, 2018 An international team of researchers (Switzerland, Russia) has developed a simpler method to generate multiple frequency combs using optical microresonators consisting of a crystalline disk a few millimeters in diameter. At every round, a part of the soliton exits the resonator, producing a stream of optical pulses. It allows the light to travel in the disk in spatial modes of the resonator. In this way, they were able to generate up to three frequency combs at the same time. Using multiplexing scheme, the team demonstrated several applications, such as dual-comb spectroscopy, and rapid optical sampling…read […]