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arXiv · 2012.06543

Demonstration of ultra-low noise equivalent power using a longitudinal proximity effect transition-edge sensor

Peter C. Nagler·John E. Sadleir·Edward J. Wollack
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Abstract

Future far-infrared astronomy missions will need large arrays of detectors with exceptionally low noise-equivalent power (NEP), with some mission concepts calling for thousands of detectors with NEPs below a few $\times 10^{-20}$ W/$\sqrt{\mathrm{Hz}}$. Though much progress has been made toward meeting this goal, such detector systems do not exist today. In this work, we present a device that offers a compelling path forward: the longitudinal proximity effect (LoPE) transition-edge sensor (TES). With a chemically-stable and mechanically-robust architecture, the LoPE TES we designed, fabricated, and characterized also exhibits unprecedented sensitivity, with a measured electrical NEP of $8 \times 10^{-22}$ W/$\sqrt{\mathrm{Hz}}$. This represents a >100x advancement of the state-of-the-art, pushing TES detectors into the regime where they may be employed the achieve to goals of even the most ambitious large and cold future space instruments.

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Peter C. Nagler, John E. Sadleir, Edward J. Wollack. 2020-12-11. Demonstration of ultra-low noise equivalent power using a longitudinal proximity effect transition-edge sensor. https://arxiv.org/abs/2012.06543

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