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Strong mode coupling-enabled hybrid photon-plasmon laser with a microfiber-coupled nanorod.

ABSTRACT: Laser based on single plasmonic nanoparticle can provide optical frequency radiation far beyond the diffraction limit and is one of the ultimate goals of nanolasers, yet it remains a challenge to be realized because of the inherently high Ohmic loss. Here, we report the direct observation of lasing in microfiber-coupled single plasmonic nanoparticles enabled by strong mode coupling. We show that, by strongly coupling a gold nanorod (GNR) with the whispering gallery cavity of a dye-doped polymer microfiber (with diameter down to 2.0 μm), the substantially enhanced optical coherence of the hybrid photon-plasmon mode and effective gain accumulated from the active microfiber cavity enable single-mode laser emission from the GNR at room temperature with a threshold as low as 2.71 MW/cm² and a linewidth narrower than 2 nm.

SUBMITTER: Zhou N

PROVIDER: S-EPMC9269887 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature

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Strong mode coupling-enabled hybrid photon-plasmon laser with a microfiber-coupled nanorod.

Zhou Ning N Yang Yuxin Y Guo Xin X Gong Jue J Shi Zhangxing Z Yang Zongyin Z Wu Hao H Gao Yixiao Y Yao Ni N Fang Wei W Wang Pan P Tong Limin L

Science advances 20220708 27

Laser based on single plasmonic nanoparticle can provide optical frequency radiation far beyond the diffraction limit and is one of the ultimate goals of nanolasers, yet it remains a challenge to be realized because of the inherently high Ohmic loss. Here, we report the direct observation of lasing in microfiber-coupled single plasmonic nanoparticles enabled by strong mode coupling. We show that, by strongly coupling a gold nanorod (GNR) with the whispering gallery cavity of a dye-doped polymer ...[more]

PMID: 35857454

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