December 1 - 6, 2024
Boston, Massachusetts

Event Supporters

2024 MRS Fall Meeting & Exhibit
EL07.19.06

Wavelength Tunable Infrared Perfect Absorption in Plasmonic Nanocrystal Monolayers

When and Where

Dec 5, 2024
4:45pm - 5:00pm
Sheraton, Second Floor, Back Bay D

Presenter(s)

Co-Author(s)

Woo Je Chang1,Zarko Sakotic1,Alexander Ware1,Allison Green1,Benjamin Roman1,Kihoon Kim1,Thomas Truskett1,Dan Wasserman1,Delia Milliron1

The University of Texas at Austin1

Abstract

Woo Je Chang1,Zarko Sakotic1,Alexander Ware1,Allison Green1,Benjamin Roman1,Kihoon Kim1,Thomas Truskett1,Dan Wasserman1,Delia Milliron1

The University of Texas at Austin1
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.

Keywords

nanostructure | optical properties

Symposium Organizers

Viktoriia Babicheva, University of New Mexico
Ho Wai (Howard) Lee, University of California, Irvine
Melissa Li, California Institute of Technology
Yu-Jung Lu, Academia Sinica

Symposium Support

Bronze
APL Quantum
Enlitech
Walter de Gruyter GmbH

Session Chairs

Yu-Jung Lu
Yang Zhao

In this Session