Proposal and numerical study on capsule-shaped nanometallic semiconductor lasers

Zhang, Baifu; Okimoto, Takuya; Tanemura, Takuo; Nakano, Yoshiaki

doi:10.7567/jjap.53.112703

Cited by 14 publications

(10 citation statements)

References 40 publications

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“…A number of simulation studies have highlighted that considerable improvements in the performance of metal cavity devices are possible by optimizing or modifying their structure. In [51] it is shown how a simple change in the shape of the ends of a Fabry Perot cavity constructed with the waveguide of figure 2a, can significantly reduce metal losses. In [52] a different structure to that of figure 2a is shown where the electrical contacts are separated from the optical mode.…”

Section: Relevant Simulation and Modelling Resultsmentioning

confidence: 99%

Electrically pumped metallic and plasmonic nanolasers

Hill

2018

Chinese Phys. B

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In recent years there have been a significant number of demonstrations of small metallic and plasmonic lasers. The vast majority of these demonstrations have been for optically pumped devices. Electrically pumped devices are advantageous for applications and could demonstrate concepts not amenable for optical pumping. However, there have been relatively few demonstrations of electrically pumped small metal cavity lasers. This lack of results is due to the following reasons: There are limited types of electrically pumped gain medium available. There is a significantly greater level of complexity required in the fabrication of electrically pumped devices. Finally, the required components for electrical pumping restrict cavity design options and furthermore make it intrinsically more difficult to achieve lasing. This review looks at the motivation for electrically pumped nanolasers, the key issues that need addressing for them to be realized, the results that have been achieved so far including devices where lasing has not been achieved, and potential new directions that could be pursued.

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Section: Relevant Simulation and Modelling Resultsmentioning

confidence: 99%

Electrically pumped metallic and plasmonic nanolasers

Hill

2018

Chinese Phys. B

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“…Finally, optimizations of thermal properties need to be carried out by selecting appropriate material and thickness of the insulator layer to improve thermal dissipation. From simple calculation , if we could improve the Q factor to 400, for example, lasing should be achieved at pumping power below 0.2 mW.…”

Section: Fabrication and Measurementmentioning

confidence: 99%

“…In our previous work, we have proposed a novel capsule‐shaped topology that introduces cylindrical facets with optimal curvature to a conventional rectangular cavity . As the resonant mode is pushed into the center of the cavity by the curved mirrors, the mode overlap with the sidewalls and the metallic losses are reduced effectively.…”

Section: Introductionmentioning

confidence: 99%

Qfactor improvement by capsule-shaped metallic cavity structure for subwavelength lasers

Zhang

Chieda

Okimoto

et al. 2015

Phys. Status Solidi A

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A series of wavelength‐scale capsule‐shaped metallic cavity structures with InGaAs/InGaAsP multiple quantum wells are fabricated and characterized by photoluminescence measurement for the first time. By introducing cylindrical facets with optimal curvature to a conventional rectangular cavity, the electric field of the resonant mode is pushed effectively into the center of the mesa. As a result, the mode distribution at the metallic sidewalls and the plasmonic losses are reduced dramatically. We experimentally confirm up to fourfold enhancement in the Q factor of the fabricated capsule‐shaped cavity compared with that of a rectangular structure with same dimension. The measured results are consistent with the 3D finite‐difference time‐domain simulation, and validate the effectiveness of the scheme.

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“…Besides, optimizing the geometry of the cavity structure for a low-loss resonant mode can also increase the Q value effectively. For example, capsule-shaped cavity (CSC) structure [14][15][16] and Gaussian-shaped cavity (GSC) structure [17], which take advantage of Gaussian-like mode by introducing cylindrical facets to conventional metallic cavity, are proposed to confine the resonant mode tightly in the center of cavity with reduced metallic losses.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Asymmetric Capsule-Shaped Metallic Cavities for Unidirectional Waveguide Coupling

Zhang

Wang

et al. 2020

IEEE Photonics J.

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We propose and numerically investigate a novel asymmetric capsule-shaped metallic cavity (ACMC) structure for unidirectional waveguide coupling. By introducing cylindrical facets at cavity ends with different radius, asymmetric resonant mode is confined inside the cavity so that the evanescent energy can be unevenly coupled into the two directions of the waveguide underneath the cavity. We conduct three-dimensional finite-difference time-domain simulations and demonstrate the effectiveness of the proposed ACMC-based unidirectional waveguide coupling. Besides, by modifying suitable geometry of the proposed structure, the extinction ratio and coupling efficiencies of both directions of the waveguide can be flexibly designed, resulting in unequal coupling of optical energy. In addition, the dependence of the waveguide-coupling properties on ACMC geometry is also numerically investigated in this paper.

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Proposal and numerical study on capsule-shaped nanometallic semiconductor lasers

Cited by 14 publications

References 40 publications

Electrically pumped metallic and plasmonic nanolasers

Electrically pumped metallic and plasmonic nanolasers

Qfactor improvement by capsule-shaped metallic cavity structure for subwavelength lasers

Design and Analysis of Asymmetric Capsule-Shaped Metallic Cavities for Unidirectional Waveguide Coupling

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