Investigating The Optical Anisotropy of Nanocolumnar Metamaterial Platforms: A Comprehensive Analysis Using Mueller Matrix Spectroscopic Ellipsometry Technique
ORAL
Abstract
The nanostructures are at the forefront of advanced technologies such as optoelectronics, quantum information, and biomedical applications, where precise control and assessment of their structural dimensions are crucial for their effective integration into various systems [1,2]. However, accurately determining their critical dimensions and optical properties remains a significant challenge. This study investigates the evolution of depolarization factors in the anisotropic Bruggeman effective medium approximations, revealing their extreme sensitivity to the nanostructure dimensions. Therefore, we fabricate slanted nanocolumnar metamaterial platforms from zirconia, silicon, titanium, and permalloy using glancing angle deposition technique. Utilizing Mueller matrix spectroscopic ellipsometry (covering spectral range from 0.72 eV to 6.5 eV), we extract anisotropic optical properties, including the complex dielectric function and birefringence. Our findings demonstrate a generalized inverse relationship between depolarization factors and column length, providing predictive insights into the optical properties of nanocolumnar thin films [2]. Additionally, we demonstrate their potential in sensing technologies by discussing their performance in nanoparticle detection through cross-polarized spectral color variations.
References:
[1] Carneiro, S. V., et al., Materials Today Nano 22 (2023): 100345.
[2] Kilic, U., et al., Advanced Optical Materials (2024): 2302767.
*National Science Foundation. Grant Numbers:DMR1808715, ECCS2329940, CMMI2211858 Air Force Office of Scientific Research. Grant Numbers:FA9550-18-1-0360, FA9550-19-S-0003, FA9550-21-1-0259, FA9550-23-1-0574 Materials Research Science and Engineering Center, University of Nebraska. Grant Number:DMR 1420645 Swedish Knut and Alice Wallenbergs Foundation American Chemical Society Petroleum Research Fund Deutsche Forschungsgemeinschaft. Grant Number:FE 1532/1-1 The Office of Naval Research Young Investigator Program. Grant Number:N00014-19-1-2384 University of Nebraska Foundation J. A. Woollam Foundation Office of Experimental Program to Stimulate Competitive Research. Grant Number:NSF OIA-2044049
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Publication:Kilic, Ufuk, Yousra Traouli, Matthew Hilfiker, Khalil Bryant, Stefan Schoeche, Rene Feder, Christos Argyropoulos, Eva Schubert, and Mathias Schubert. "Nanocolumnar Metamaterial Platforms: Scaling Rules for Structural Parameters Revealed from Optical Anisotropy." Advanced Optical Materials (2024): 2302767.
Presenters
Ufuk Kilic
University of Nebraska - Lincoln
Authors
Ufuk Kilic
University of Nebraska - Lincoln
Yousra Traouli
University of Nebraska - Lincoln
Matthew Hilfiker
Onto Innovation Inc.
Khalil Jorel Bryant
University of Michigan
Stefan Schoeche
J.A. Woollam Co. Inc.
Rene Feder
Fraunhofer Institute for Microstructure of Materials and Systems (IMWS)
