Driven & thermal fields

Broadband nonreciprocal thermal emissivity and absorptivity

2024 · Published laboratory optical and thermal measurement

Measured evidence

What this work contributes

Measures magnetically tunable nonreciprocal absorption and emission across a broader infrared band using layered InAs. Comparing two layer thicknesses links fabrication choices to measured optical behavior.

Where the evidence stops

Absorption and emission measurements use different temperatures and instruments, introducing shifts and uncertainty. No propulsion force or complete heat-engine performance is measured.

Keep the conditions with the result

Measured / modeled quantity
Spectral-directional absorptivity and emissivity
Reported scale
12.5–16 μm band, 1 T magnetic field, individual layer thicknesses of 50 and 150 nm.
Conditions
Absorptivity at 25 °C; emissivity with the sample at 100 °C.
Evidence context
Two sample designs and simulation comparisons reported; independent replication not assessed.
Design use
Specify measured material spectra, layer thickness and temperature when evaluating nonreciprocal force models.
Review access
Full published paper inspected, including measurement conditions and stated uncertainty sources.

Original source

Komron J. Shayegan, Jae S. Hwang, Bo Zhao, Aaswath P. Raman, Harry A. Atwater. Broadband nonreciprocal thermal emissivity and absorptivity. Light: Science & Applications 13, 176 (2024).

DOI: 10.1038/s41377-024-01520-3

How we use it

This record belongs to Driven & thermal fields. Its evidence label describes the cited work, not the maturity of a Metric Flight device. Follow the original methods, corrections and conditions before transferring a result to a different geometry or scale.

Editorial note reviewed 19 October 2026. AI assisted research discovery and synthesis. Citation metadata and claims were checked against primary publication or institutional records; full-text access varies. Read the source for the complete method.