Genetic-algorithm-optimized wideband on-chip polarization rotator with an ultrasmall footprint

Yu, Zejie; Cui, Haoran; Sun, Xiankai

doi:10.1364/ol.42.003093

Cited by 125 publications

(53 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The photonic devices were characterized by coupling light from an optical fiber into and out of the PICs via grating couplers. The grating couplers were designed to be polarization sensitive so that they also served as mode selectors 31 , enabling highly efficient excitation of the fundamental TM bound modes in the PICs. The propagation loss of straight waveguides was extracted from the transmission of waveguides with different lengths, as shown in Fig.…”

mentioning

confidence: 99%

Photonic integrated circuits with bound states in the continuum

et al. 2019

Optica

Self Cite

158

View full text Add to dashboard Cite

Waves that are perfectly confined in the continuous spectrum of radiating waves without interaction with them are known as bound states in the continuum (BICs). Despite recent discoveries of BICs in nanophotonics, full routing and control of BICs are yet to be explored. Here, we experimentally demonstrate BICs in a fundamentally new photonic architecture by patterning a low-refractive-index material on a high-refractive-index substrate, where dissipation to the substrate continuum is eliminated by engineering the geometric parameters. Pivotal BIC-based photonic components are demonstrated, including waveguides, microcavities, directional couplers, and modulators. Therefore, this work presents the critical step of photonic integrated circuits in the continuum, and enables the exploration of new single-crystal materials on an integrated photonic platform without the fabrication challenges of patterning the single-crystal materials. The demonstrated lithium niobate platform will facilitate development of functional photonic integrated circuits for optical communications, nonlinear optics at the single photon level as well as scalable photonic quantum information processors.

show abstract

mentioning

confidence: 99%

Photonic integrated circuits with bound states in the continuum

et al. 2019

Optica

Self Cite

158

View full text Add to dashboard Cite

show abstract

“…(b) An ultracompact polarization beamsplitter using DBS algorithm [52]. (c) An ultracompact polarization rotator using genetic algorithm [60]. (d) A subwavelength ultracompact polarization beamsplitter [61].…”

Section: Multimode Waveguide Devices Based On Inverse Designmentioning

confidence: 99%

“…high performance of ultracompact footprint of 0.96 µm × 4.2 µm and large bandwidth of 157 nm [60]. Figure 5(c) shows a digital ultracompact polarization splitter-rotator on the SOI platform [61].…”

Section: Multimode Waveguide Devices Based On Inverse Designmentioning

confidence: 99%

Silicon-based multimode waveguide crossings

Chang

Zhang

2020

J. Phys. Photonics

View full text Add to dashboard Cite

Mode multiplexing technique is a new promising option to increase the transmission capacity of on-chip optical interconnects. Multimode waveguide crossings are the key building blocks in high-density and large-scale mode division multiplexing silicon photonic integrated circuits. In this paper, we review the recent progresses on silicon-based multimode waveguide crossings. Firstly, a variety of multimode waveguide crossing schemes are demonstrated and introduced including conventional multimode interference coupler, Maxwell's fisheye lens and inverse-designed multimode interference coupler. Secondly, we also discuss some emerging applications of the inverse design algorithm in the multimode silicon devices to realize ultracompact footprint and multiple functionalities. Finally, we also give the outlook of the development prospects of on-chip multimode waveguide crossings.

show abstract

“…The most popular one being the SIMP method [8] which relaxes the binary constraint on the optical index by allowing continuous variations of n(x) inside the component between n SiGe and n air , and uses a penalization of intermediate state or projections methods to finally obtain the distribution of the two materials. Evolutionary methods have also been considered several times [19,22] and have the advantage of producing inherently manufacturable design despite their high simulation cost. Geometrical methods [10,11] which, contrary to the SIMP methodology, directly deal with the binary-valued materials by iteratively advecting the shape, produce, after each iteration, a new shape better than the previous one in term of objective value.…”

Section: Shape Optimizationmentioning

confidence: 99%

Shape optimization for the design of passive mid-infrared photonic components

et al. 2019

View full text Add to dashboard Cite

Shape optimization techniques were first developed in the context of mechanical engineering and, more recently, applied to photonic components for data communication. Here, motivated by the growing application potential of mid-infrared photonics driven by chemical sensing and spectroscopy, we present the design by shape optimization of passive components operating in this wavelength range. A focus is placed on the creation of designs that are fabricable and robust to manufacturing uncertainties.Keywords shape optimization · level-set · mid-IR photonics IntroductionDriven by data communication in the near-IR wavelength range, silicon photonics has experienced tremendous developments in the last few decades. The transposition of this scientific and industrial success to the mid-IR (wavelengths comprised between 3 µm and 12 µm) has been envisioned some time ago [21] and is currently under rapid progress, with noteworthy developments in materials, passive and active components, laser sources, photodetectors and sensors [6]. Due to the strong absorption bands situated in this wavelength range, applications are found, for instance, in trace gas sensing, spectroscopy and imaging of biological tissues [6].In the last decades, shape optimization techniques, boosted by additive manufacturing technologies, have been successfully applied to mechanical engineering [2]. More recently, shape optimization appeared in the domain of silicon photonics, first with simulations and designs of passive devices [8,12] and then with micro-fabrication and experimental demonstrations [15,19,7].In the context of optimal design of photonic components, most contributions rely on density methods [8,12]. This popular paradigm, originally introduced in the context of structural mechanics as a heuristic approximation of mathematical homogenization, and known in this context as the SIMP method [3], amounts to trade the conventional "black-and-white" representation of a design for a "grayscale" density function, with continuous values in the whole interval [0, 1]. This considerably simplifies the optimization process, but raises the need for an approximate modeling of the physical equations, which have to be expressed in terms of the density function, as well as issues about the interpretation of the resulting design, and notably of its "grayscale" regions, where the density function takes intermediate values in (0, 1).On the other hand, more "geometric" methods, featuring a clear representation of the boundary of the optimized shape, have been considered, relying for instance on the concepts of shape and topological N. Lebbe Univ.

show abstract

Genetic-algorithm-optimized wideband on-chip polarization rotator with an ultrasmall footprint

Cited by 125 publications

References 35 publications

Photonic integrated circuits with bound states in the continuum

Photonic integrated circuits with bound states in the continuum

Silicon-based multimode waveguide crossings

Shape optimization for the design of passive mid-infrared photonic components

Contact Info

Product

Resources

About