Spin-Momentum-Locked Edge Mode for Topological Vortex Lasing

Yang, Zhenghao; Shao, Zengkai; Chen, Huazhou; Mao, Xinrui; Ma, Ren‐Min

doi:10.1103/physrevlett.125.013903

Cited by 107 publications

(45 citation statements)

References 73 publications

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“…As a result, although this bulk state mode does not carry OAM (l = 0), the emission is highly directional in the axis vertical to the cavity plane with divergence angles less than 6°and side-mode suppression ratios of over 36 dB. Based on a similar material system but with a slightly altered cavity design, authors from the same group are also able to observe lasing of spin-momentum-locked edge states [91]. In addition to vertical emission, the output beam from these cavities is observed to carry a topological charge of l = −2, while also allowing for higher side-mode suppression ratios of over 42 dB.…”

Section: Orbital Angular Momentummentioning

confidence: 99%

Nanolaser arrays: toward application-driven dense integration

et al. 2020

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The past two decades have seen widespread efforts being directed toward the development of nanoscale lasers. A plethora of studies on single such emitters have helped demonstrate their advantageous characteristics such as ultrasmall footprints, low power consumption, and room-temperature operation. Leveraging knowledge about single nanolasers, the next phase of nanolaser technology will be geared toward scaling up design to form arrays for important applications. In this review, we discuss recent progress on the development of such array architectures of nanolasers. We focus on valuable attributes and phenomena realized due to unique array designs that may help enable real-world, practical applications. Arrays consisting of exactly two nanolasers are first introduced since they can serve as a building block toward comprehending the behavior of larger lattices. These larger-sized lattices can be distinguished depending on whether or not their constituent elements are coupled to one another in some form. While uncoupled arrays are suitable for applications such as imaging, biosensing, and even cryptography, coupling in arrays allows control over many aspects of the emission behavior such as beam directionality, mode switching, and orbital angular momentum. We conclude by discussing some important future directions involving nanolaser arrays.

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Section: Orbital Angular Momentummentioning

confidence: 99%

Nanolaser arrays: toward application-driven dense integration

et al. 2020

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“…As classical analogies of the quantum topological insulators [7], the associated unidirectional propagating edge states have been extended into different classical wave regimes such as pho-tonics [8,9], airborne acoustics [10][11][12][13][14], water waves [15] and elastic waves [16][17][18][19][20][21]. Up to date, topology has found applications in waveguide coupling [22], robust Fano resonance [23], vortex lasing [24], and one-way propagation of signals for communications and spin-wave manipulation devices [25,26]. Therefore, topologically protected edge states with backscattering-immune and spin-momentum locking effects provide robustness of operating classical waves.…”

Section: Introductionmentioning

confidence: 99%

Non-Hermitian topological coupler for elastic waves

Meng

Shen

et al. 2021

Sci. China Phys. Mech. Astron.

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Non-Hermitian topological systems, by combining the advantages of topological robustness and sensitivity induced by non-Hermiticity, have recently emerged and attracted much research interest. Here, we propose a device based on the topological coupler in elastic waves with non-Hermiticity, which contains two topological domain walls and four ports. In this device, topological robustness routes the transmission of waves, while non-Hermiticity controls the gain or loss of waves as they propagate. These mechanisms result in continuous and quantitative control of the energy distribution ratio of each port. A non-Hermitian Hamiltonian is introduced to reveal the coupling mechanism of the topological coupler, and a scattering matrix is proposed to predict the energy distribution ratio of each port. The proposed topological coupler, which provides a new paradigm for the non-Hermitian topological systems, can be employed as a sensitive beam splitter or a coupler switch. Moreover, the topological coupler has potential applications in information processing and logic operation in elastic circuits or networks, and the paradigm also applies to other classical systems.

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“…In conventional photonic topological insulators, the boundary states with one-dimensional lower than the bulk are hosted, exhibiting robust transport against defects and sharp bends [1][2][3][4][5]. Such robustness has been demonstrated in various systems [6][7][8][9][10][11][12][13], promoting novel approaches to one-way waveguide [6][7][8][9][10][11][12], robust laser [14][15][16][17][18][19][20][21] and chiral quantum optical interface [22][23][24]. Recently, a new class of photonic topological insulators, higher-order topological insulators, has been proposed and realized, which supports lowerdimensional boundary states [25,26].…”

Section: Introductionmentioning

confidence: 99%

Optimization and robustness of topological corner state in second-order topological photonic crystal

Xie,

Dang,

Yan

et al. 2021

Preprint

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Spin-Momentum-Locked Edge Mode for Topological Vortex Lasing

Cited by 107 publications

References 73 publications

Nanolaser arrays: toward application-driven dense integration

Nanolaser arrays: toward application-driven dense integration

Non-Hermitian topological coupler for elastic waves

Optimization and robustness of topological corner state in second-order topological photonic crystal

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