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Surface roughness effects on aluminium-based ultraviolet plasmonic nanolasers.

ABSTRACT: We systematically investigate the effects of surface roughness on the characteristics of ultraviolet zinc oxide plasmonic nanolasers fabricated on aluminium films with two different degrees of surface roughness. We demonstrate that the effective dielectric functions of aluminium interfaces with distinct roughness can be analysed from reflectivity measurements. By considering the scattering losses, including Rayleigh scattering, electron scattering, and grain boundary scattering, we adopt the modified Drude-Lorentz model to describe the scattering effect caused by surface roughness and obtain the effective dielectric functions of different Al samples. The sample with higher surface roughness induces more electron scattering and light scattering for SPP modes, leading to a higher threshold gain for the plasmonic nanolaser. By considering the pumping efficiency, our theoretical analysis shows that diminishing the detrimental optical losses caused by the roughness of the metallic interface could effectively lower (~33.1%) the pumping threshold of the plasmonic nanolasers, which is consistent with the experimental results.

SUBMITTER: Chung YC

PROVIDER: S-EPMC5206644 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature

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Surface roughness effects on aluminium-based ultraviolet plasmonic nanolasers.

Chung Yi-Cheng YC Cheng Pi-Ju PJ Chou Yu-Hsun YH Chou Bo-Tsun BT Hong Kuo-Bin KB Shih Jheng-Hong JH Lin Sheng-Di SD Lu Tien-Chang TC Lin Tzy-Rong TR

Scientific reports 20170103

We systematically investigate the effects of surface roughness on the characteristics of ultraviolet zinc oxide plasmonic nanolasers fabricated on aluminium films with two different degrees of surface roughness. We demonstrate that the effective dielectric functions of aluminium interfaces with distinct roughness can be analysed from reflectivity measurements. By considering the scattering losses, including Rayleigh scattering, electron scattering, and grain boundary scattering, we adopt the mod ...[more]

PMID: 28045127

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Dataset Information

Surface roughness effects on aluminium-based ultraviolet plasmonic nanolasers.

Publications

Surface roughness effects on aluminium-based ultraviolet plasmonic nanolasers.

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