![]() ![]() Photonic chip for laser stabilization to an atomic vapor with 10 −11 instability. Optical frequency comb generation from a monolithic microresonator. Coherent solid-state LIDAR with silicon photonic optical phased arrays. Ultralow-noise photonic microwave synthesis using a soliton microcomb-based transfer oscillator. An optical-frequency synthesizer using integrated photonics. Quantum optical circulator controlled by a single chirally coupled atom. Scheucher, M., Hilico, A., Will, E., Volz, J. Flying couplers above spinning resonators generate irreversible refraction. Waveguide-integrated high-performance magneto-optical isolators and circulators on silicon nitride platforms. Monolithic integration of broadband optical isolators for polarization-diverse silicon photonics. Monolithic on-chip magneto-optical isolator with 3 dB insertion loss and 40 db isolation ratio. Monolithically-integrated TE-mode 1D silicon-on-insulator isolators using seedlayer-free garnet. Dynamically reconfigurable integrated optical circulators. Ce:YIG/silicon-on-insulator waveguide optical isolator realized by adhesive bonding. On-chip optical isolation in monolithically integrated non-reciprocal optical resonators. Electronically programmable photonic molecule. What is and what is not electromagnetically induced transparency in whispering-gallery microcavities. Electrically driven acousto-optics and broadband non-reciprocity in silicon photonics. On-chip optical non-reciprocity through a synthetic Hall effect for photons. Optical isolation using microring modulators. Acousto-optic modulation of a wavelength-scale waveguide. Hybrid integrated photonics using bulk acoustic resonators. Direction reconfigurable nonreciprocal acousto-optic modulator on chip. Nonreciprocal optical dissipation based on direction-dependent Rabi splitting. Synthetic phonons enable nonreciprocal coupling to arbitrary resonator networks. Non-reciprocal interband Brillouin modulation. Time-reversal symmetry breaking with acoustic pumping of nanophotonic circuits. Generalized non-reciprocity in an optomechanical circuit via synthetic magnetism and reservoir engineering. Nonreciprocity and magnetic-free isolation based on optomechanical interactions. Complete linear optical isolation at the microscale with ultralow loss. Non-reciprocal Brillouin scattering induced transparency. Brillouin-scattering-induced transparency and non-reciprocal light storage. Angular-momentum-biased nanorings to realize magnetic-free integrated optical isolation. Photonic Aharonov–Bohm effect in photon–phonon interactions. Non-reciprocal phase shift induced by an effective magnetic flux for light. Electrically driven nonreciprocity induced by interband photonic transition on a silicon chip. Optical isolator using two tandem phase modulators. Reconfigurable light-driven opto-acoustic isolators in photonic crystal fibre. Linear isolation is demonstrated with simultaneously 39 dB contrast and 10 dB bandwidth up to ~200 MHz. ![]() We demonstrate isolators at wavelengths one octave apart near 1,550 nm and 780 nm, fabricated from the same lithium-niobate-on-insulator wafer. Our concept is implemented using a lithium niobate racetrack resonator in which phonon-mediated 13 photonic Autler–Townes splitting 10, 16, 23, 24 breaks the chiral symmetry of the resonant modes. Here we demonstrate an electrically driven optical isolator design that leverages the unbeatable transparency of a short, high-quality dielectric waveguide, with the strong attenuation from a critically coupled absorber. So far, no magnetless alternative 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22 has managed to simultaneously combine linearity (that is, no frequency shift), linear response (that is, input–output scaling), ultralow insertion loss and large directional contrast on-chip. Optical isolators today are exclusively built on magneto-optic principles but are not readily implemented within photonic integrated circuits. ![]()
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