Micro-optics articles within Nature Photonics

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  • Comment |

    We posit that inconsistent interpretations of experimental data have led to inaccurate claims on metalens focusing efficiencies. By performing a meta-analysis, we show that extraordinary claims of high focusing efficiency at high numerical apertures are, unfortunately, not yet backed by rigorous simulation or experimental results.

    • Rajesh Menon
    •  & Berardi Sensale-Rodriguez

  • News & Views |

    The resonance wavelengths of optical Möbius strip microcavities can be continuously tuned via geometric phase manipulation by changing the thickness-to-width ratio of the strip.

    • Bruno Piccirillo
    •  & Verónica Vicuña-Hernández

  • Article
    | Open Access

    The existence of the optical Berry phase in all-dielectric Möbius-strip cavities is experimentally confirmed. In contrast to a predicted sole Berry phase value of π, arbitrary values of the Berry phase upon adiabatic evolution of a linearly or elliptically polarized light wave are obtained.

    • Jiawei Wang
    • , Sreeramulu Valligatla
    •  & Oliver G. Schmidt

  • News & Views |

    Optical fibres can now directly generate a variety of Bessel beams thanks to custom-designed, intricate 3D-printed structures applied to their tips.

    • Siddharth Ramachandran

  • Article |

    Visible-spectrum silicon nitride thermo-optic phase modulators based on adiabatic micro-ring resonators with a small device footprint and low power consumption, of potential use for applications like augmented-/virtual-reality goggles, quantum information processing circuits and optogenetics, are presented.

    • Guozhen Liang
    • , Heqing Huang
    •  & Nanfang Yu

  • News & Views |

    Reducing the footprint of optical spectrometers is a critical requirement for many in-field applications. Now, a single black phosphorus photodetector with a wavelength-scale size enables mid-infrared computational spectrometry.

    • Vicente Durán

  • Article |

    Enhanced second-harmonic generation is achieved through random quasi-phase-matching in three-dimensional Mie resonant disordered microspheres realized by the bottom-up assembly of barium titanate nanocrystals.

    • Romolo Savo
    • , Andrea Morandi
    •  & Rachel Grange

  • News & Views |

    A monolithic chip-scale ring laser gyroscope based on both Brillouin and Sagnac effects provides a sensitivity sufficient to measure sinusoidal rotations with an amplitude as small as 5 degrees per hour, thus enabling the first on-chip Earth rotation measurement.

    • Thibaut Sylvestre

  • Letter |

    An optoelectronic device that measures and suppresses the phase noise of a source has been realized in an integrated silicon platform.

    • Mohamad Hossein Idjadi
    •  & Firooz Aflatouni

  • Letter |

    A Sagnac gyroscope based on Brillouin ring lasers on a silicon chip is presented. The stability and sensitivity of this on-chip planar gyroscope allow measurement of the Earth’s rotation, with an amplitude sensitivity as small as 5 deg h−1 for a sinusoidal rotation, an angle random walk of 0.068 deg h−1/2 and bias instability of 3.6 deg h−1.

    • Yu-Hung Lai
    • , Myoung-Gyun Suh
    •  & Kerry Vahala

  • Article |

    Parity–time symmetry in second quantization is demonstrated in an integrated non-Hermitian coupled waveguide structure. A counterintuitive shift of the position of the Hong–Ou–Mandel dip is observed in integrated lossy waveguide structures.

    • F. Klauck
    • , L. Teuber
    •  & A. Szameit

  • Article |

    Through degenerate Kerr four-wave mixing in ultrahigh-Q crystalline microresonators made of magnesium fluoride, tunable conversion of a compact, low-power telecommunications laser over an entire optical octave from 1,083 nm to 2,670 nm, with signatures of mid-infrared sidebands at almost 4,000 nm, is shown.

    • Noel Lito B. Sayson
    • , Toby Bi
    •  & Stuart G. Murdoch

  • Article |

    Based on optically breaking time-reversal symmetry by spin polarizing a gain medium with a circularly polarized optical pump, an integrated scheme for controlling the chirality of orbital angular momentum lasing is demonstrated.

    • N. Carlon Zambon
    • , P. St-Jean
    •  & J. Bloch

  • Letter |

    By nesting a Kerr microresonator in a fibre loop with gain, 50-nm-wide bright microcavity-based soliton combs with a mode efficiency of 75% can be induced at average powers more than one order of magnitude lower than the Lugiato–Lefever soliton power threshold, facilitating real-world applications.

    • Hualong Bao
    • , Andrew Cooper
    •  & Alessia Pasquazi

  • Letter |

    Self-organization far from thermal equilibrium in a thermo-optical feedback process occurring in a random array of Fabry–Pérot resonators is shown, adding new capability to dynamic self-assembly in creating materials with fine-tuned adaptive responses.

    • Chad Ropp
    • , Nicolas Bachelard
    •  & Xiang Zhang

  • News & Views |

    An acoustic wave can induce non-reciprocal light modulation in a silicon waveguide. Now, the acoustic wave has been induced optically in a neighbouring silicon waveguide, opening the way for a silicon-based optical isolator.

    • Alexander Yu. Petrov

  • Article |

    Non-reciprocal single-sideband modulation and mode conversion are realized in a low-loss integrated silicon waveguide, enabling >125 GHz operation bandwidths and up to 38 dB of non-reciprocal contrast between forward- and backward-propagating waves.

    • Eric A. Kittlaus
    • , Nils T. Otterstrom
    •  & Peter T. Rakich

  • Letter |

    Linewidth broadening of a phonon laser operated at an exceptional point of a compound optomechanical system is experimentally demonstrated.

    • Jing Zhang
    • , Bo Peng
    •  & Lan Yang

  • Letter |

    Non-magnetic non-reciprocal transparency and amplification is experimentally achieved by optomechanics using a whispering-gallery microresonator. The idea may lead to integrated all-optical isolators or non-reciprocal phase shifters.

    • Zhen Shen
    • , Yan-Lei Zhang
    •  & Chun-Hua Dong

  • Letter |

    A mechanism for confining and guiding light that relies on spin–orbit interactions of light is presented.

    • Sergei Slussarenko
    • , Alessandro Alberucci
    •  & Lorenzo Marrucci

  • News & Views |

    Uncompromised performance of micro-optical compound lenses has been achieved by high-fidelity shape definition during two-photon absorption microfabrication. The lenses have been made directly onto image sensors and even onto the tip of an optic fibre.

    • Saulius Juodkazis

  • Letter |

    Direct f–2f self-referencing of a microresonator-based optical frequency comb is demonstrated at a repetition rate of 16.4 GHz. The carrier envelope offset frequency and repetition rate are stabilized to a hydrogen maser-based atomic clock.

    • Pascal Del'Haye
    • , Aurélien Coillet
    •  & Scott A. Diddams

  • News & Views |

    Mechanical oscillation in a microtoroidal optical cavity transfers chaos from a pump to a probe laser beam with a different wavelength. Through stochastic resonance, the combination of noise and internal chaotic dynamics leads to amplification of optomechanically induced light self-oscillations.

    • Marc Sciamanna

  • Letter |

    Structured light is used to created optical traps with stiffness an order of magnitude higher than conventional Gaussian traps in one-dimension.

    • Michael A. Taylor
    • , Muhammad Waleed
    •  & Warwick P. Bowen

  • Article |

    Trapping of a terahertz wave in a photonic-crystal slab and subsequent ‘capture’ through absorption are demonstrated. Over 90% of the wave lying within 17% of the centre frequency is absorbed. Application to the stabilization of terahertz wireless communication systems is shown.

    • Ryoma Kakimi
    • , Masayuki Fujita
    •  & Tadao Nagatsuma

  • Editorial |

    The convergence of micro-optics and microelectromechanical systems continues to spawn new directions in optics.

  • Letter |

    A chip-compatible beamsplitter that can separate left- and right-handed circularly polarized light is promising for constructing more sophisticated integrated optical circuits. The prism-shaped device, which operates around the telecommunication wavelength of 1.5 μm, consists of a photonic crystal composed of an array of helical structures.

    • Mark D. Turner
    • , Matthias Saba
    •  & Min Gu

  • Article |

    A miniature spectrometer has been developed that employs light scattering in a photonic chip with a random structure. It generates wavelength-dependent speckle patterns, which are detected and analysed to recover the spectrum of the input signal. It has a resolution of 0.75 nm in the 1,500 nm wavelength region.

    • Brandon Redding
    • , Seng Fatt Liew
    •  & Hui Cao

  • Letter |

    Researchers use femtosecond laser pulses to create acoustic pulses that strain quantum dots and modulate their transition energies. When the quantum dots are housed in a microcavity, tuning the quantum dots to the optical resonance of the cavity causes the emission output to be enhanced by more than two orders of magnitude.

    • C. Brüggemann
    • , A. V. Akimov
    •  & M. Bayer

  • News & Views |

    ACTMOST, a new initiative subsidized by the European Commission, looks poised to boost microphotonic innovation in Europe.

    • Rachel Won

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