Photonic crystal concentric dual-microring resonator for refractive index sensing

Shi, Bingyao; Xiao, Chen; Cai, Yuanyuan; Kang, Qi; Wang, Yiquan

doi:10.1364/josab.496822

Cited by 3 publications

(1 citation statement)

References 38 publications

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“…The topological protection we have studied in the previous section applies only to the first mechanism: small imperfections affecting the bulk waveguides but that do not close its photonic band gap will not increase leakage to the waveguide, and thus the Q factor will be robust against them. Since the topological invariant (and transitions) are only defined for light propagating along the waveguide, and not for light radiating out, there will be no topological protection against the radiation loss (it is possible to introduce topological protection along this direction by using concentric ring resonators [27]), and it will be unaffected by the topological nature of the transition in the waveguide. Nevertheless, there is an interesting trade-off in the strength of the dimerization (and the width of the photonic bandgap) and the radiation losses.…”

Section: Quantitative Analysis Of the Loss Mechanismsmentioning

confidence: 99%

Implementation of the SSH model in an optical ring resonator

Hotte-Kilburn,

Bianucci

2024

J. Opt.

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The implementation of physical models with topological features in optical systems has garnered much attention in recent times. In particular, on-chip integrated photonics platforms are promising platforms enabling us to take advantage of the promise of topologically robust modes against inevitable fabrication defects. Here, we propose to study the SSH model superimposed in an optical ring resonator in a quantitative way using electromagnetic simulations. We are interested in lhe localized states that appear when a topological phase transition is introduced into the ring. In particular, we examine the extent to which topologically protected modes maintain their properties in the presence of random deformations in the surrounding lattice. We find that the modes maintain their properties when small amounts of disorder are introduced into the system. We also study loss mechanisms in the localized states, distinguishing between losses to the adjacent waveguide and to radiation, finding that the topological protection only applies to the former.

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Section: Quantitative Analysis Of the Loss Mechanismsmentioning

confidence: 99%

Implementation of the SSH model in an optical ring resonator

Hotte-Kilburn,

Bianucci

2024

J. Opt.

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Mid‐Infrared Hyperuniform Disordered Solids Waveguide Devices with Morphology Engineering and Wall‐Network Regulation

Chen,

Sun,

Zhang

et al. 2024

Laser & Photonics Reviews

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Hyperuniform disordered solids (HUDS) waveguides, a type of emerging artificial photonic bandgap (PBG) devices, are demonstrated to possess large, complete, and isotropic PBGs, being promising for developing applications in optoelectronics, nonlinear optics, and sensing. However, optical losses of HUDS waveguides are usually limited by giant light scattering from the irregular distribution of HUDS cells. Herein, HUDS waveguide devices are demonstrated with low optical losses and large PBGs by exploring a morphology‐engineering and wall‐network‐regulation method of developing HUDS structures. The results show that the proposed device can achieve a 3.0 dB transmittance improvement for a 36‐µm‐long silicon HUDS waveguide. Based on the proposed HUDS structure, a waveguide‐coupled HUDS‐cladding nanocavity is also demonstrated with a quality factor of ≈70 at 2.250 µm wavelengths and a theoretical refractive index sensitivity of 446 nm RIU−1. The study opens an avenue to develop intriguing HUDS waveguide devices for on‐chip applications.

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Structured light routing in CROW-endowed add-drop filters

Alexeyev,

Barshak,

Lapin

et al. 2024

J. Opt. Soc. Am. B

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In this paper, we study the propagation of optical vortices (OVs) through the add-drop filter that comprises a coupled resonator optical waveguide (CROW). We develop a fully vectorial theory not based on transfer matrix formalism and apply it to the description of CROWs based on multimode fibers. We study the transmission of higher-order OVs through a CROW-endowed add-drop filter and demonstrate the possibility of transmitting such OVs along the CROW chain. We show that during such transmission OVs may invert their topological charges and determine the condition under which an OV propagates without such charge inversion. We suggest that such a system can be used for the generation of OV frequency combs. We also study group delay time and show that this system may be used as a time delay line for OVs.

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Photonic crystal concentric dual-microring resonator for refractive index sensing

Cited by 3 publications

References 38 publications

Implementation of the SSH model in an optical ring resonator

Implementation of the SSH model in an optical ring resonator

Mid‐Infrared Hyperuniform Disordered Solids Waveguide Devices with Morphology Engineering and Wall‐Network Regulation

Structured light routing in CROW-endowed add-drop filters

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