  Ultrafast light-matter interactions lead to optical-field-driven
photocurrents with an attosecond-level temporal response. These photocurrents
can be used to detect the carrier-envelope-phase (CEP) of short optical pulses,
and could be utilized to create optical-frequency, petahertz (PHz) electronics
for information processing. Despite recent reports on optical-field-driven
photocurrents in various nanoscale solid-state materials, little has been done
in examining the large-scale integration of these devices. In this work, we
demonstrate enhanced, on-chip CEP detection via optical-field-driven
photocurrent in a monolithic array of electrically-connected plasmonic bow-tie
nanoantennas that are contained within an area of hundreds of square microns.
The technique is scalable and could potentially be used for shot-to-shot CEP
tagging applications requiring orders of magnitude less pulse energy compared
to alternative ionization-based techniques. Our results open new avenues for
compact time-domain, on-chip CEP detection, and inform the development of
integrated circuits for PHz electronics as well as integrated platforms for
attosecond and strong-field science.
