Ultra-broadband absorbance of nanometer-thin pyrolyzed-carbon film on silicon nitride membrane.

Autor: Jorudas J; Department of Physics and Mathematics, Center of Photonics Research, University of Eastern Finland, Yliopistokatu 7, FI-80101 Joensuu, Finland.; Department of Optoelectronics, Center for Physical Sciences and Technology (FTMC), Saulėtekio av. 3, LT-10257 Vilnius, Lithuania., Rehman H; Department of Physics and Mathematics, Center of Photonics Research, University of Eastern Finland, Yliopistokatu 7, FI-80101 Joensuu, Finland., Cojocari M; Department of Physics and Mathematics, Center of Photonics Research, University of Eastern Finland, Yliopistokatu 7, FI-80101 Joensuu, Finland., Pashnev D; Department of Optoelectronics, Center for Physical Sciences and Technology (FTMC), Saulėtekio av. 3, LT-10257 Vilnius, Lithuania., Urbanowicz A; Department of Optoelectronics, Center for Physical Sciences and Technology (FTMC), Saulėtekio av. 3, LT-10257 Vilnius, Lithuania.; UAB 'TERAVIL', Savanoriu av. 235, LT-02300, Vilnius, Lithuania., Kašalynas I; Department of Optoelectronics, Center for Physical Sciences and Technology (FTMC), Saulėtekio av. 3, LT-10257 Vilnius, Lithuania.; Institute of Applied Electrodynamics and Telecommunications, Vilnius University, Saulėtekio al. 3, 10257 Vilnius, Lithuania., Bertoni B; Dipartimento di Fisica, Università di Pisa, largo Bruno Pontecorvo 3, I-56127 Pisa, Italy., Vicarelli L; Dipartimento di Fisica, Università di Pisa, largo Bruno Pontecorvo 3, I-56127 Pisa, Italy., Pitanti A; Dipartimento di Fisica, Università di Pisa, largo Bruno Pontecorvo 3, I-56127 Pisa, Italy.; NEST, CNR-Istituto Nanoscienze, piazza San Silvestro 12, I-56127 Pisa, Italy., Malykhin S; Department of Physics and Mathematics, Center of Photonics Research, University of Eastern Finland, Yliopistokatu 7, FI-80101 Joensuu, Finland., Svirko Y; Department of Physics and Mathematics, Center of Photonics Research, University of Eastern Finland, Yliopistokatu 7, FI-80101 Joensuu, Finland., Kuzhir P; Department of Physics and Mathematics, Center of Photonics Research, University of Eastern Finland, Yliopistokatu 7, FI-80101 Joensuu, Finland., Fedorov G; Department of Physics and Mathematics, Center of Photonics Research, University of Eastern Finland, Yliopistokatu 7, FI-80101 Joensuu, Finland.
Jazyk: angličtina
Zdroj: Nanotechnology [Nanotechnology] 2024 May 09; Vol. 35 (30). Date of Electronic Publication: 2024 May 09.
DOI: 10.1088/1361-6528/ad4157
Abstrakt: Fifty percents absorption by thin film, with thickness is much smaller than the skin depth and optical thickness much smaller than the wavelength, is a well-known concept of classical electrodynamics. This is a valuable feature that has been numerously widely explored for metal films, while chemically inert nanomembranes are a real fabrication challenge. Here we report the 20 nm thin pyrolyzed carbon film (PyC) placed on 300 nm thick silicon nitride (Si 3 N 4 ) membrane demonstrating an efficient broadband absorption in the terahertz and near infrared ranges. While the bare Si 3 N 4 membrane is completely transparent in the THz range, the 20 nm thick PyC layer increases the absorption of the PyC coated Si 3 N 4 membrane to 40%. The reflection and transmission spectra in the near infrared region reveal that the PyC film absorption persists to a level of at least 10% of the incident power. Such a broadband absorption of the PyC film opens new pathways toward broadband bolometric radiation detectors.
(Creative Commons Attribution license.)
Databáze: MEDLINE
Externí odkaz: