Unidirectional lasing in nonlinear Taiji microring resonators

Heras, A. Muñoz de las; Carusotto, Iacopo

doi:10.1103/physreva.104.043501

Cited by 19 publications

(15 citation statements)

References 36 publications

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“…This is a standard procedure in the study of symmetry-breaking phase transitions. Another exciting option to explore is to deform the lattice in a way that a single Dirac valley is dynamically favored and time-reversal symmetry gets effectively broken without the need for reciprocity-breaking elements, but with the help of the nonlinear mechanisms involved in condensation, as recently studied in simpler geometries [55].…”

Section: Discussionmentioning

confidence: 99%

Polariton condensation into vortex states in the synthetic magnetic field of a strained honeycomb lattice

2022

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Photonic materials are a rapidly growing platform for studying condensed matter physics with light, where the exquisite control capability is allowing us to learn about the relation between microscopic dynamics and macroscopic properties. One of the most interesting aspects of condensed matter is the interplay between interactions and the effect of an external magnetic field or rotation, responsible for a plethora of rich phenomena---Hall physics and quantized vortex arrays. At first sight, however, these effects for photons seem vetoed: they do not interact with each other and they are immune to magnetic fields and rotations. Yet in specially devised structures these effects can be engineered. Here, we propose the use of a synthetic magnetic field induced by strain in a honeycomb lattice of resonators to create a non-equilibrium Bose-Einstein condensate of light-matter particles (polaritons) in a rotating state, without the actual need for external rotation nor reciprocity-breaking elements. We show that thanks to the competition between interactions, dissipation and a suitably designed incoherent pump, the condensate spontaneously becomes chiral by selecting a single Dirac valley of the honeycomb lattice, occupying the lowest Landau level and forming a vortex array. Our results offer a new platform where to study the exciting physics of arrays of quantized vortices with light and pave the way to explore the transition from a vortex-dominated phase to the photonic analogue of the fractional quantum Hall regime.

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Section: Discussionmentioning

confidence: 99%

Polariton condensation into vortex states in the synthetic magnetic field of a strained honeycomb lattice

2022

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“…The model here described has to be carefully considered when taiji resonators are arranged in complex topology because interference with other photonic components can alter this simple picture [140]. Taiji MR are used for unidirectional [151] or topological lasers [152,153] or as building blocks for topological photonic systems [154,155].…”

Section: Hermitian and Non-hermitian Physicsmentioning

confidence: 99%

Thirty Years in Silicon Photonics: A Personal View

Pavesi

2021

Front. Phys.

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Silicon Photonics, the technology where optical devices are fabricated by the mainstream microelectronic processing technology, was proposed almost 30 years ago. I joined this research field at its start. Initially, I concentrated on the main issue of the lack of a silicon laser. Room temperature visible emission from porous silicon first, and from silicon nanocrystals then, showed that optical gain is possible in low-dimensional silicon, but it is severely counterbalanced by nonlinear losses due to free carriers. Then, most of my research focus was on systems where photons show novel features such as Zener tunneling or Anderson localization. Here, the game was to engineer suitable dielectric environments (e.g., one-dimensional photonic crystals or waveguide-based microring resonators) to control photon propagation. Applications of low-dimensional silicon raised up in sensing (e.g., gas-sensing or bio-sensing) and photovoltaics. Interestingly, microring resonators emerged as the fundamental device for integrated photonic circuit since they allow studying the hermitian and non-hermitian physics of light propagation as well as demonstrating on-chip heavily integrated optical networks for reconfigurable switching applications or neural networks for optical signal processing. Finally, I witnessed the emergence of quantum photonic devices, where linear and nonlinear optical effects generate quantum states of light. Here, quantum random number generators or heralded single-photon sources are enabled by silicon photonics. All these developments are discussed in this review by following my own research path.

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“…16,22,27) However, such a model only explains the high unidirectionality with extremely low backscattering. 16,27) More recently, a more detailed model was proposed including the existence of gain nonlinearlity by Heras et al 35) This model attributed the origin of high unidirectionality to nonlinear gain saturation, but the factors with regards to the lasing process, such as the carrier dynamics and spontaneous emissions, were not properly included in the system. The impact of self-and cross-gain saturation and robustness against backscattering was not sufficiently discussed, either.…”

Section: Introductionmentioning

confidence: 99%

Rate equation analysis for deterministic and unidirectional lasing in ring resonators with an S-shaped coupler

Dai,

Lin,

Iwamoto

2024

Jpn. J. Appl. Phys.

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Ring resonators are traditionally popular optical devices that apply to various components in photonic integrated circuits. They also play an important role in the on-chip generation of many novel optical states in topological systems and non-Hermitian systems. Unidirectional lasing of ring resonators is used in many such systems to create exotic states of light including optical vortexes and optical skyrmions, but the unidirectional behavior has not been fully understood. Previous research has constructed a simplified model to explain the steady state behaviors of unidirectional ring resonators, but the carrier dynamics and spontaneous emission were omitted. In this work, we give a numerical analysis of unidirectional ring resonators with an S-shaped coupler. We identified the importance of the gain saturation to robustness against backscattering and high unidirectionality by comparing to the linear model without saturation. We also discuss the effect of amount of asymmetrical coupling to the realization of unidirectionality.

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Unidirectional lasing in nonlinear Taiji microring resonators

Cited by 19 publications

References 36 publications

Polariton condensation into vortex states in the synthetic magnetic field of a strained honeycomb lattice

Polariton condensation into vortex states in the synthetic magnetic field of a strained honeycomb lattice

Thirty Years in Silicon Photonics: A Personal View

Rate equation analysis for deterministic and unidirectional lasing in ring resonators with an S-shaped coupler

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