Using resistive losses induced by optically excited surface plasmons has shown promise as a CMOS-compatible plasmonic light detector. Increased electron scattering introduced by surface plasmons in an applied current results in a measurable decrease in electrical conductance of a grating, allowing a purely electronic readout of surface plasmon excitation. Accordingly, because of its plasmonic nature, such a detector is dependent on both the wavelength and polarization of incident light with a response time limited by the surface plasmon lifetime. Our ultrafast measurements with electronic read-out indicate that the response time of this detector is on the order of 1ps. Thus such a detector would enable time-resolved biomedical applications such as real-time monitoring of protein structural dynamics for pharmacological applications and research.
Alec Cheney, Borui Chen, Tianmu Zhang, Tim Thomay, and Alexander Cartwright, "Plasmoelectronic sensor for real-time on-chip wavelength selective biosensing," Proc. SPIE 10077, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XIV, 1007704 (Presented at SPIE BiOS: January 30, 2017; Published: 22 February 2017); https://doi.org/10.1117/12.2252176.
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