Exploring Parasitics and Coupling between Optically Driven Nanoantennas and Interconnects in Petahertz Electronic Circuits

In pursuit of petahertz electronics, we seek to develop light-wave electronic circuits which are orders of mag-nitude faster than conventional electronics and work to realize signal processing at unprecedented bandwidths [1]. Optically driven nanoantennas are a promising candidate for petahertz electronics, with many advantages such as sub-cycle attosecond charge transport, polarization sensitivity, and low optical field requirements due to their geometrical and resonant field enhancement [2]–[4]. However, the development of petahertz logic-gates [5] and memory circuits is hindered by the computational cost of full electromagnetic and particle tracking simulations, which become unwieldy when scaling from a single antenna to a system of multiple interconnected ones. To overcome this challenge, we developed a compact circuit model in LTspice which goes beyond describing the electromagnetic response as was done in prior works [6]. Our model also describes charge transport in a nanoantenna, paving the way for effective modeling of functional petahertz circuit elements.