Searcharxiv⌕ Search
Home/Archive/arXiv

arXiv · 2611.08848

Self-injection-locked dark-soliton Kerr optical frequency combs with high even-order normal dispersion

Lei Shi·Rujiang Li·Shilong Liu·Dumitru Mihalache·Boris A. Malomed·Pengfei Li
View original source ↗Read source document ↗Export metadata ↓

Abstract

We numerically investigate dissipative dark-soliton (DDS) microcombs under the action of pure high even-order normal (HEON) dispersion in a microresonator with the self-injection locking (SIL). Pure 4th, 6th, 10th, and 14th-order normal dispersion can support DDSs formed by interlocked switching waves, directly excited through a SIL-based turnkey scheme without detuning sweeps. Compared to the pure 4th-order case, the switching-wave tail oscillation period increases and its decay rate decreases with the increase of the dispersion order. Although the overall comb bandwidth narrows, the number of non-pump comb lines above a common absolute power threshold increases. Furthermore, the feedback phase controls the DDS duty cycle and intracavity comb-line power distribution, while the increase of the pump power improves the estimated pump-to-comb output conversion efficiency.

Explore related subjects

physics.opticsnlin.PS

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

Lei Shi, Rujiang Li, Shilong Liu, Dumitru Mihalache, Boris A. Malomed, Pengfei Li. 2026-11-06. Self-injection-locked dark-soliton Kerr optical frequency combs with high even-order normal dispersion. https://arxiv.org/abs/2611.08848

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related papers

arXiv2026

Emergent Non-Equilibrium Emission Profiles via Luminescent Angle Restriction for Photovoltaic Energy Conversion

The detailed-balance method determines photovoltaic conversion efficiencies by relating non-equilibrium converter operation to an equilibrium reference state. Conventionally, the angular and spectral radiative channels are assumed to be defined by the equilibrium absorptivity and emissivity, with the photon chemical potential setting their occupation. The spatial distribution of emission must also be considered when radiative energy is redistributed within a complex nanophotonic converter architecture. Here we analyze this redistribution with a proposed luminescent angle restrictor, in which a flat-plate photovoltaic absorber is coupled to an overlayer with vertically aligned nanorods. The nanorod layer is nearly transparent to near-normal sunlight, while oblique photovoltaic luminescence can be absorbed, re-emitted, and partially returned to the absorber. To calculate the operating emission profile, we develop a Markov-chain transport model with an absorbing-chain formulation that enforces microscopic reversibility for local optical transitions while determining the spatially distributed steady-state emission rates. The model recovers the flat-plate detailed-balance limit and predicts voltage-dependent external emission profiles from the coupled architecture. Under idealized conditions, this non-equilibrium angular redistribution increases conversion efficiency relative to the conventional flat-plate reference. We further evaluate nanorod photoluminescence quantum yield, angular restriction, orientational disorder, and Auger recombination to identify practical constraints on the proposed architecture. These results show how detailed-balance limits for photovoltaic structures can depend on internal radiative energy redistribution and the resulting non-equilibrium emission profile, beyond what can be inferred from the macroscopic equilibrium optical response alone.

physics.optics↗
arXiv2026

Undulating Diamond Photonic Crystal in the Royal Jewel Butterfly: Circumventing Refractive Index Limits to Defy Iridescence

The modest refractive-indices of biomolecules place fundamental constraints on the optical performance of natural photonic organisms. To overcome this limitation, organisms reshape basic optical structures into hierarchical architectures, exhibiting performance rivals that of high-index materials. Here we show how the Royal Jewel butterfly (Hypochrysops polycletus) employs such a strategy to circumvent the low refractive-index of chitin to achieve an unusual combination of intense structural colouration and remarkably weak angular dependence. A single-diamond photonic crystal, which was hailed as the 'holy grail' and documented only in beetles and weevils, has now been discovered in the butterfly. It deforms into a hierarchically undulated superstructure guided by basal lamina and correlated with quasi-twinning boundaries with mirror symmetry. The scale surface is thus fully terminated by inclined {111} facets essential for fundamental bandgap, producing bright specular Bragg reflection at intermediate to high angles and low-angle radiation enabled by simultaneously coupling localised resonances populated through anisotropic Bloch transport, thereby transforming an otherwise strongly angle-dependent photonic crystal into a vivid, angle-robust optical structure. Following this optical concept, an artificially angle-insensitive optical prototype was fabricated through two-photon polymerisation, validating the mechanism as a transferable design principle at the intersection of fundamental nanophotonics and bio-inspired engineering.

physics.optics↗
arXiv2026

Observation of pseudospin-locked chiral edge transport in gyromagnetic photonic crystals

Photonic pseudospins enable selective excitation and routing of light, but perturbations that mix opposite pseudospins can induce backscattering in helical edge channels. Here, we experimentally demonstrate pseudospin-locked chiral edge transport in gyromagnetic photonic crystals, combining pseudospin selectivity with nonreciprocal unidirectional propagation. By jointly engineering lattice deformation and magnetic bias, we control dipolar-quadrupolar band inversions and construct interfaces supporting pseudospin-selective chiral channels. Microwave near-field and transmission measurements reveal a single chiral edge branch that is selectively excited by only one source handedness and exhibits pronounced nonreciprocal transport. Extending this mechanism to multidomain structures, we combine two pseudospin channels into a common waveguide, separate them into distinct outputs, and route them through intersecting interfaces. These configurations realize a nonreciprocal photonic pseudospin multiplexer and demultiplexer, together with a waveguide crossing exhibiting average measured crosstalk of -14.1 and -15.8 dB for its two input channels. Our results present an experimental route to integrating pseudospin-selective channel control with chiral edge transport, providing a foundation for nonreciprocal photonic networks that use pseudospin to organize and route multiple wave channels.

physics.optics↗