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Wavelength Tunable Infrared Perfect Absorption in Plasmonic Nanocrystal Monolayers.
Chang, Woo Je; Sakotic, Zarko; Ware, Alexander; Green, Allison M; Roman, Benjamin J; Kim, Kihoon; Truskett, Thomas M; Wasserman, Daniel; Milliron, Delia J.
Afiliación
  • Chang WJ; McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States.
  • Sakotic Z; Chandra Family Department of Electrical and Computer Engineering, University of Texas at Austin, Austin, Texas 78758, United States.
  • Ware A; Chandra Family Department of Electrical and Computer Engineering, University of Texas at Austin, Austin, Texas 78758, United States.
  • Green AM; McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States.
  • Roman BJ; McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States.
  • Kim K; McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States.
  • Truskett TM; McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States.
  • Wasserman D; Department of Physics, University of Texas at Austin, Austin, Texas 78712, United States.
  • Milliron DJ; Chandra Family Department of Electrical and Computer Engineering, University of Texas at Austin, Austin, Texas 78758, United States.
ACS Nano ; 18(1): 972-982, 2024 Jan 09.
Article en En | MEDLINE | ID: mdl-38117550
ABSTRACT
The ability to efficiently absorb light in ultrathin (subwavelength) layers is essential for modern electro-optic devices, including detectors, sensors, and nonlinear modulators. Tailoring these ultrathin films' spectral, spatial, and polarimetric properties is highly desirable for many, if not all, of the above applications. Doing so, however, often requires costly lithographic techniques or exotic materials, limiting scalability. Here we propose, demonstrate, and analyze a mid-infrared absorber architecture leveraging monolayer films of nanoplasmonic colloidal tin-doped indium oxide nanocrystals (ITO NCs). We fabricate a series of ITO NC monolayer films using the liquid-air interface method; by synthetically varying the Sn dopant concentration in the NCs, we achieve spectrally selective perfect absorption tunable between wavelengths of two and five micrometers. We achieve monolayer thickness-controlled coupling strength tuning by varying NC size, allowing access to different coupling regimes. Furthermore, we synthesize a bilayer film that enables broadband absorption covering the entire midwave IR region (λ = 3-5 µm). We demonstrate a scalable platform, with perfect absorption in monolayer films only hundredths of a wavelength in thickness, enabling strong light-matter interaction, with potential applications for molecular detection and ultrafast nonlinear optical applications.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Nano Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Nano Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos