Ms. Huan Chen Profile

Huan Chen

at Shaanxi Normal Univ

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SPIE Journal Paper | 8 May 2024 Open Access

Plasmon-assisted mode selection lasing in a lanthanide-based microcavity

Lei Guo, Min Ji, Bowen Kang, Min Zhang, Xin Xie, Zihao Wu, Huan Chen, Volker Deckert, Zhenglong Zhang

AP, Vol. 6, Issue 03, 035001, (May 2024) https://doi.org/10.1117/12.10.1117/1.AP.6.3.035001

KEYWORDS: Optical microcavities, Silver, Polarization, Microspheres, Upconversion, Radio propagation, Fluorescence, Thulium, Laser applications, Fluorescence intensity

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Lanthanide-based microlasers have attracted considerable attention owing to their large anti-Stokes shifts, multiple emission bands, and narrow linewidths. Various applications of microlasers, such as optical communication, optical storage, and polarization imaging, require selecting the appropriate laser polarization mode and remote control of the laser properties. Here, we propose a unique plasmon-assisted method for the mode selection and remote control of microlasing using a lanthanide-based microcavity coupled with surface plasmon polaritons (SPPs) that propagate on a silver microplate. With this method, the transverse electrical (TE) mode of microlasers can be easily separated from the transverse magnetic (TM) mode. Because the SPPs excited on the silver microplate only support TM mode propagation, the reserved TE mode is resonance-enhanced in the microcavity and amplified by the local electromagnetic field. Meanwhile, lasing-mode splitting can be observed under the near-field excitation of SPPs due to the coherent coupling between the microcavity and mirror microcavity modes. Benefiting from the long-distance propagation characteristics of tens of micrometers of SPPs on a silver microplate, remote excitation and control of upconversion microlasing can also be realized. These plasmon-assisted polarization mode-optional and remote-controllable upconversion microlasers have promising prospects in on-chip optoelectronic devices, encrypted optical information transmission, and high-precision sensors.

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