  Guided-wave plasmonic circuits are promising platforms for sensing,
interconnection, and quantum applications in the sub-diffraction regime.
Nonetheless, the loss-confinement trade-off remains a collective bottleneck for
plasmonic-enhanced optical processes. Here, we report a unique plasmonic
waveguide that can alleviate such trade-off and improve the efficiencies of
plasmonic-based emission, light-matter-interaction, and detection
simultaneously. Through different bias configurations, record experimental
attributes such as normalized Purcell factor approaching 10^4, 10-dB amplitude
modulation with <1 dB insertion loss and fJ-level switching energy, and
photodetection sensitivity and internal quantum efficiency of -54 dBm and 6.4 %
respectively can be realized within the same amorphous-based plasmonic
structure. The ability to support multiple optoelectronic phenomena while
providing performance gains over existing plasmonic and dielectric counterparts
offers a clear path towards reconfigurable, monolithic plasmonic circuits.
