Observation of Linear and Nonlinear Light Localization at the Edges of Moiré Arrays

Архипова, Арина Алексеевна; Kartashov, Yaroslav V.; Ivanov, Sergey K.; Zhuravitskii, Sergei A.; Skryabin, N. N.; Dyakonov, I. V.; Калинкин, А. М.; Kulik, S. P.; Компанец, В. О.; Чекалин, С. В.; Ye, Fangwei; Torner, Lluís; Zadkov, Victor N.

doi:10.1103/physrevlett.130.083801

Cited by 19 publications

(4 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Certainly, structural perturbations in the superlattice could affect the flatbands, with the extent of this influence dependent on the specific fabrication conditions. Further studies are necessary to explore and understand these effects, which may be useful for experimental implementations, especially as several experimental techniques have demonstrated their capability of realizing nontrivial moiré superlattices, including nanofabrication, 26 photorefractive effect, 21 , 22 and femtosecond-laser writing 32 …”

Section: Discussionmentioning

confidence: 99%

“…Further studies are necessary to explore and understand these effects, which may be useful for experimental implementations, especially as several experimental techniques have demonstrated their capability of realizing nontrivial moiré superlattices, including nanofabrication, 26 photorefractive effect, 21,22 and femtosecond-laser writing. 32…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Robust moiré flatbands within a broad band-offset range

Hong,

Liang,

Chen

et al. 2023

Adv. Photon. Nexus

View full text Add to dashboard Cite

Photonic analogs of the moiré superlattices mediated by interlayer electromagnetic coupling are expected to give rise to rich phenomena, such as nontrivial flatband topology. Here, we propose and demonstrate a scheme to tune the flatbands in a bilayer moiré superlattice by employing a band offset. The band offset is changed by fixing the bands of one slab while shifting those of the other slab, which is accomplished by modifying the thickness of the latter slab. Our results show that the band-offset tuning not only makes some flatbands emerge and disappear but also leads to two sets of flatbands that are robustly formed even with the change of band offset over a broad range. These robust flatbands form either at the AA-stack site or at the AB-stack site, and as a result, a single-cell superlattice can support a pair of high-quality localized modes with tunable frequencies. Moreover, we develop a diagrammatic model to provide an intuitive insight into the formation of the robust flatbands. Our work demonstrates a simple yet efficient way to design and control complex moiré flatbands, providing new opportunities to utilize photonic moiré superlattices for advanced light-matter interaction, including lasing and nonlinear harmonic generation.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Robust moiré flatbands within a broad band-offset range

Hong,

Liang,

Chen

et al. 2023

Adv. Photon. Nexus

View full text Add to dashboard Cite

show abstract

“…In recent years, a new class of structures, twisted bilayer photonic crystal, has spurred significant interest. − These structures consist of two layers of photonic crystal slabs that can be twisted in plane relative to each other. Their scattering properties are highly tunable by the twist angle, which provides exciting opportunities for reconfigurable photonic devices, such as tunable filters, sensors and lasers. ,, …”

Section: Introductionmentioning

confidence: 99%

Free-Space Beam Steering with Twisted Bilayer Photonic Crystal Slabs

Lou,

Tang,

et al. 2024

ACS Photonics

View full text Add to dashboard Cite

We numerically demonstrate the inverse design of a structure for free-space beam steering, based on twisted bilayer photonic crystal slabs. The structure consists of two photonic crystal slabs that can be twisted in plane relative to each other. By rotating the two slabs in plane, one can diffract normally incident light into different outgoing angles, maintaining most of the power in the desired outgoing channel. Our work shows a novel way of achieving free-space beam steering in a compact structure and indicates the important opportunities in inverse design based on bilayer photonic crystal structures.

show abstract

“…Diverse localized modes (no matter the matter waves or classical waves), including fundamental solitons, gap solitons, and vortices, have been found with the help of periodic potentials and under nonlinear regimes [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33]; the latter two modes combine the finite gap's strong localization and materials's nonlinearity, enabling the formation and control of robust localized gap modes. Recently, the localization of light and matters has been extended to a novel twisted structure named Moiré superlattices that can be tuned to periodic form under the Pythagorean angle and an aperiodic one for other angles [34][35][36][37][38][39][40][41]; particularly, soliton formation and gap solitons and vortical ones have been addressed in such settings [28,[39][40][41][42][43]. It is deserved to be emphasized that twisted structures such as Moiré optical lattices can be made easily in optics and condensed matter physics experiments, providing a new controllable (twisted angle) degree of freedom in studying the linear, nonlinear, and quantum properties of light and matter waves.…”

Section: Introductionmentioning

confidence: 99%

One-Dimensional Gap Soliton Molecules and Clusters in Optical Lattice-Trapped Coherently Atomic Ensembles via Electromagnetically Induced Transparency

Chen,

Xie,

Zhou

et al. 2023

Crystals

View full text Add to dashboard Cite

In past years, optical lattices have been demonstrated as an excellent platform for making, understanding, and controlling quantum matters at nonlinear and fundamental quantum levels. Shrinking experimental observations include matter-wave gap solitons created in ultracold quantum degenerate gases, such as Bose–Einstein condensates with repulsive interaction. In this paper, we theoretically and numerically study the formation of one-dimensional gap soliton molecules and clusters in ultracold coherent atom ensembles under electromagnetically induced transparency conditions and trapped by an optical lattice. In numerics, both linear stability analysis and direct perturbed simulations are combined to identify the stability and instability of the localized gap modes, stressing the wide stability region within the first finite gap. The results predicted here may be confirmed in ultracold atom experiments, providing detailed insight into the higher-order localized gap modes of ultracold bosonic atoms under the quantum coherent effect called electromagnetically induced transparency.

show abstract

Observation of Linear and Nonlinear Light Localization at the Edges of Moiré Arrays

Cited by 19 publications

References 35 publications

Robust moiré flatbands within a broad band-offset range

Robust moiré flatbands within a broad band-offset range

Free-Space Beam Steering with Twisted Bilayer Photonic Crystal Slabs

One-Dimensional Gap Soliton Molecules and Clusters in Optical Lattice-Trapped Coherently Atomic Ensembles via Electromagnetically Induced Transparency

Contact Info

Product

Resources

About