Ultrabroadband beam splitting in a dissipative system of three waveguides

具有局部增益的 azimuthally 调制波导阵列中稳定高电荷涡旋耗散孤子

Stable high-charge vortex dissipative solitons in azimuthally modulated waveguide arrays with localized gain

研究发现，在具有局部增益的 azimuthally 调制波导阵列中，高电荷涡旋孤子可通过低功率阈值稳定存在，且传播稳定性优于低电荷状态。

Slow-light frequency combs and dissipative Kerr solitons in coupled-cavity waveguides

We study Kerr frequency combs and dissipative Kerr solitons in silicon photonic crystal coupled-cavity waveguides (CCW) with globally optimized dispersion at telecom wavelengths. The corresponding threshold for comb generation is found to explicitly depend on the main CCW figures of merit, namely, mode volume, normal mode quality factor and slow-light group index. Our analysis is carried out by solving the non-linear dynamics of the CCW Bloch modes in presence of Kerr non-linearity and two-photon absorption. Our results open the way to CCW comb generation via dispersion engineering and slow-li…

Dissipative Soliton Mediated Radiations in Active Silicon-Based Waveguides

The Ginzburg-Landau (GL) equation is in general not integrable by the inverse scattering method and support solitary-wave solution, called dissipative soliton (DS). We numerically demonstrate that, a DS can radiate dispersive waves (DWs) in presence of third-order dispersion (TOD). We propose a silicon-based active waveguide that excites stable DSs. Energy can be transferred from these stable DS to linear DWs when a resonance condition is achieved. The dynamics of the DS is governed by the complex GL equation which we solve numerically for different operational parameters. Numerical solution o…

Edge and bulk dissipative solitons in modulated PT-symmetric waveguide arrays

We address dissipative soliton formation in modulated PT-symmetric continuous waveguide arrays composed from waveguides with amplifying and absorbing sections, whose density gradually increases (due to decreasing waveguide separation) either towards the center of the array or towards its edges. In such a structure the level of gain/loss at which PT-symmetry gets broken depends on the direction of increase of the waveguide density. Breakup of the PT-symmetry occurs when eigenvalues of modes localized in the region, where waveguide density is largest, collide and move into complex plane. In this…

具有线性增益和非线性损耗的双波导晶格中耗散孤子的存在性与稳定性

Existence and Stability of Dissipative Solitons in a Dual-Waveguide Lattice with Linear Gain and Nonlinear Losses

研究聚焦和散焦非线性下双波导晶格中同相与反相耗散孤子的存在性及稳定性，发现孤子从线性放大模式分叉，且稳定区域随线性增益与非线性损耗变化，传播模拟验证了线性稳定性分析结果。

Controllable multiple beam splitting in Hermitian and non-Hermitian symmetric coupled waveguide systems

We investigate high-fidelity multiple beam splitting in Hermitian and non-Hermitian symmetric coupled waveguides with one input and 2N output waveguide channels. In Hermitian systems, we realize adiabatically light splitting in resonant case based on the stimulated Raman adiabatic passage (STIRAP) and arbitrary proportion from the middle waveguide to outer waveguides in propagation coefficients mismatch case using shortcuts to adiabaticity (STA) technique. In non-Hermitian systems with even waveguides being dissipative, the compact and robust beam splitting can be achieved by eliminating the n…

Coupling Quantum Antennas to Fibers and Waveguides

We present a brief overview of the transport of quantum light across a one-dimensional waveguide which is integrated with a periodic string of quantum-scale dipoles. We demonstrate a scheme to implement transparency by suitably tuning the atomic frequencies without applying a coupling field and bring out the pronounced non-reciprocity of this optical device. The fiber-mediated interaction between integrated dipoles allows one to achieve both dispersive and dissipative couplings, level repulsion and attraction, and enhanced sensing capabilities. All these ideas can be translated to a wide varie…

驱动耗散双极波导链中的同步诱导平板带

Synchronization-induced flat bands in driven-dissipative dimer-waveguide chains

研究驱动耗散双极波导链中同步诱导平板带的特性，通过泵浦强度或共振器距离控制双极同步状态，揭示其在不同相位 regime 下的动态行为及实验可观察的局部化态。

具有奇异点特性的波导-等离激元极化激元准粒子

Waveguide-Plasmon Polariton Quasiparticles with Exceptional Point Characteristics

本研究利用非厄米物理设计混合等离激元波导结构，实现具有奇异点特性的耦合模式，增强模式对比度并提升器件调控能力，为集成光子学低功耗紧凑型器件开辟新路径。

Spontaneous parametric down-conversion induced by optomechanical gradient forces in nanophotonic waveguides

Optomechanical gradient forces arise from evanescent fields of guided waves in parallel photonic waveguides. When designed to be of attractive nature, they increase exponentially as the gap between the waveguides decreases. Moreover, the amplitude of the gradient force can be well controlled due to its linear dependence on the input laser power. Here, we propose to exploit the intrinsic nonlinear nature of the optomechanical gradient force to induce a tunable 3-wave coupling between the fundamental modes of two doubly clamped nanophotonic beams. For one of the beams having half the width of th…