ArticleNPJ wireless technology2026
Overcoming the rate-power trade-off: multi-junction photovoltaic receivers for efficient near-infrared power and gigabit data transmission.
Article in NPJ wireless technology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
-Photonic power converters are promising receivers for simultaneous optical wireless information and power transfer systems. Fundamental trade-offs between generated power and data transmission speed, however, have constrained device performance. Here, we demonstrate that multi-junction architectures overcome these limitations, enabling concurrent optimization of both metrics. We introduce and validate a semi-empirical model describing static and dynamic responses of multi-junction devices. Our 4-junction InGaAsP photovoltaic receivers achieve 55.9% ± 2.0% power conversion efficiency at 27.1 W/cm² (1.45 µm) and 2.23 Gb/s using direct current-biased optical orthogonal frequency division multiplexing with adaptive bit and power loading. Over a 3‑m eye‑safe link at 1.53 µm, we simultaneously achieve 1.58 mW harvested power and 1.58 Gb/s. These results establish multi-junction photonic power converters as practical receivers and provide a solid framework for designing efficient optical wireless power transfer and communication systems.
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