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440. P. Wahl, T. Tanemura, C. Debaes, N. Vermeulen, J. Van Erps, D. A. B. Miller, and H. Thienpont, "Energy-per-Bit Limits in Plasmonic Integrated Photodetectors," IEEE J. Sel. Top. Quantum Electron. 19, 3800210 (2013). doi: 10.1109/JSTQE.2012.2227687
The energy consumption per transmitted bit is becoming a crucial figure of merit for communication channels. In this paper, we study the design tradeoffs in photodetectors, utilizing the energy per bit as a benchmark. We propose a generic
model for a photodetector that takes optical and electrical properties
into account. Using our formalism, we show how the parasitic capacitance of photodetectors can drastically alter the parameter values that lead to the optimal design. Finally, we apply our theory to a practical case study for an integrated plasmonic photodetector, showing that energies per bit below 100 attojoules are
feasible despite metallic losses and within noise limitations without
the introduction of an optical cavity or voltage amplifying receiver
circuits.
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