Remote Nanoscopy with Infrared Elastic Hyperspectral Lidar

Summary, in English

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.

• Författare: Lauro Müller; Meng Li; Hampus Månefjord; Jacobo Salvador; Nina Reistad; Julio Hernandez; Carsten Kirkeby; Anna Runemark; Mikkel Brydegaard
• Avdelning/ar: LU profilområde: Ljus och material; Förbränningsfysik; LTH profilområde: Avancerade ljuskällor; LTH profilområde: Teknik för hälsa; Centrum för miljö- och klimatvetenskap (CEC); Atomfysik; Biodiversitet; BECC: Biodiversity and Ecosystem services in a Changing Climate; CAnMove - Centrum för forskning om djurs spridning och flyttning; LTH profilområde: Energiomställningen
• Publiceringsår: 2023
• Språk: Engelska
• Publikation/Tidskrift/Serie: Advanced Science
• Volym: 10
• Issue: 15
• Länkar: http://dx.doi.org/10.1002/advs.202207110
• Dokumenttyp: Artikel i tidskrift
• Förlag: John Wiley & Sons Inc.
• Ämne: Atom and Molecular Physics and Optics
• Nyckelord: biophotonics; hyperspectral imaging; infrared spectroscopy; insects; lidar; supercontiuum; thin film physics
• Status: Published
• Forskningsgrupp: CAnMove - Centre for Animal Movement Research
• ISBN/ISSN/Övrigt: ISSN: 2198-3844