Remote Nanoscopy with Infrared Elastic Hyperspectral Lidar

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  • Lauro Müller
  • Meng Li
  • Hampus Månefjord
  • Jacobo Salvador
  • Nina Reistad
  • Julio Hernandez
  • Kirkeby, Carsten
  • Anna Runemark
  • Mikkel Brydegaard

Monitoring insects of different species to understand the factors affecting their diversity and decline is a major challenge. Laser remote sensing and spectroscopy offer promising novel solutions to this. Coherent scattering from thin wing membranes also known as wing interference patterns (WIPs) have recently been demonstrated to be species specific. The colors of WIPs arise due to unique fringy spectra, which can be retrieved over long distances. To demonstrate this, a new concept of infrared (950–1650 nm) hyperspectral lidar with 64 spectral bands based on a supercontinuum light source using ray-tracing and 3D printing is developed. A lidar with an unprecedented number of spectral channels, high signal-to-noise ratio, and spatio-temporal resolution enabling detection of free-flying insects and their wingbeats. As proof of principle, coherent scatter from a damselfly wing at 87 m distance without averaging (4 ms recording) is retrieved. The fringed signal properties are used to determine an effective wing membrane thickness of 1412 nm with ±4 nm precision matching laboratory recordings of the same wing. Similar signals from free flying insects (2 ms recording) are later recorded. The accuracy and the method's potential are discussed to discriminate species by capturing coherent features from free-flying insects.

OriginalsprogEngelsk
Artikelnummer2207110
TidsskriftAdvanced Science
Vol/bind10
Udgave nummer15
ISSN2198-3844
DOI
StatusUdgivet - 2023

Bibliografisk note

Funding Information:
This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (Grant Agreement No. 850463 Bug‐Flash). The authors thank Norsk Elektro Optikk A/S, for the continuous support and support measurements. They also thank Lund Laser Centre for access to the super continuum light source, Jadranka Rota for input and assistance with the entomological collections at Lund's zoological museum, and Paul Travers for assistance. The authors are grateful to Rachel Muheim and the Department of Biology in Lund for hosting the experiments at the Stensoffa ecological field station.

Publisher Copyright:
© 2023 The Authors. Advanced Science published by Wiley-VCH GmbH.

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