One-dimensional planar topological laser

Palatnik, Alexander; Sūdžius, M.; Meister, Stefan; Leo, Karl

doi:10.1515/nanoph-2021-0114

Cited by 10 publications

(10 citation statements)

References 34 publications

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“…Moreover, it has been theoretically suggested that the cavity modes of VCSELs 18,19,27 are mathematically equivalent to topological surface or edge states 28 . The thickness of the gain medium (including a spacer layer 29 ) in such a Fabry-Pérot cavity laser is bound to be an integer multiple N of half the emission wavelength (d = λ g 2 N, N = 1,2,3…) to fulfill the condition of constructive interference of the resonance in the cavity.…”

Section: Tunable Topological Interface-state Cavity Lasersmentioning

confidence: 99%

Perovskite quantum dot one-dimensional topological laser

et al. 2023

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Various topological laser concepts have recently enabled the demonstration of robust light-emitting devices that are immune to structural deformations and tolerant to fabrication imperfections. Current realizations of photonic cavities with topological boundaries are often limited by outcoupling issues or poor directionality and require complex design and fabrication that hinder operation at small wavelengths. Here we propose a topological cavity design based on interface states between two one-dimensional photonic crystals with distinct Zak phases. Using a few monolayers of solution-processed all-inorganic cesium lead halide perovskite quantum dots as the ultrathin gain medium, we demonstrate a lithography-free, vertical-emitting, low-threshold, and single-mode laser emitting in the green. We show that the topological laser, akin to vertical-cavity surface-emitting lasers (VCSELs), is robust against local perturbations of the multilayer structure. We argue that the design simplicity and reduction of the gain medium thickness enabled by the topological cavity make this architecture suitable for low-cost and efficient quantum dot vertical emitting lasers operating across the visible spectral region.

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Section: Tunable Topological Interface-state Cavity Lasersmentioning

confidence: 99%

Perovskite quantum dot one-dimensional topological laser

et al. 2023

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“…proposed a scheme to predict the OTS by exploiting the connection between the optical Tamm states and photonic bulk band topology. [ 8 ] A broad variety of applications is possible with topological OTS in areas such as lasing, [ 9 ] sensing, [ 10 ] communication, photodetection, [ 11 ] and so on. Tamm plasmon‐based absorber has been extensively studied in these fields.…”

Section: Introductionmentioning

confidence: 99%

“…topology. [8] A broad variety of applications is possible with topological OTS in areas such as lasing, [9] sensing, [10] communication, photodetection, [11] and so on. Tamm plasmon-based absorber has been extensively studied in these fields.…”

mentioning

confidence: 99%

Photonic Band Inversion and Absorption Enhancement in Dirac Semi‐Metal Tamm Plasmon Multilayer System

Meghna

Mathew

2023

Advanced Optical Materials

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Topological photonics is becoming increasingly important due to its possibility to manipulate light with topological phases. Constrained by tunable material, the concept of the topological phase of light is less employed for the realization of terahertz (THz) devices. Incorporating tunable plasmonic materials with topological photonic structures can promote topological protection at the THz frequency. Here the topological phase transition in the terahertz bands is demonstrated by integrating Dirac semi‐metal with topological photonic crystal. This work proposes photonic band inversion induced frequency splitting and absorption enhancement in bulk Dirac semi‐metal (BDS) based Tamm plasmon multilayer system. The enhancement in absorption is achieved by designing a one‐dimensional topological edge state such that the combination with the Tamm plasmon state provides topological protection to the entire BDS–photonic crystal heterostructure. The proposed structure undergoes band inversion, a topological transition in the photonic band structure. These results may facilitate the realization of terahertz topological effects and contribute to the goal of topological protection in sensing applications.

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“…[10][11][12] Topologically engineered photonic crystal structures are efficient platforms for lasing action, wherein emission is achieved at a relatively low pump threshold. 13,14 Photonic band gap (PBG) structures are the right candidate to fabricate devices ranging from microwaves to the visible range of the electromagnetic spectrum. A one-dimensional photonic crystal (1D PC) is a heterogenous multilayer structure periodic in one direction controlling propagating light.…”

Section: Introductionmentioning

confidence: 99%