Journal Article

PUBDB-2024-05000

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png On the applicability of the Maxwell Garnett effective medium model to media with a high density of cylindrical pores

Brandt, J. (Corresponding author) ; Dittrich, G.Extern*DESY* ; Thelen, M.Extern*DESY* ; Renner, H. ; Huber, P. (Corresponding author)Extern*DESY* ; Eich, M. ; Petrov, A.

2024
Optica Washington, DC

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Please use a persistent id in citations: doi:10.1364/OME.516125

Abstract: The optical properties of dielectric materials with subwavelength cylindrical pores are commonly described by effective medium models. We compare the Maxwell Garnett and the Bruggeman effective medium models for porous silicon with simulations and experiments for the case of polarization orthogonal to the pore axis. The Maxwell Garnett model matches the results of the simulations even up to very high porosities. An experimental study of the effective permittivity of macroporous and mesoporous silicon is conducted by analyzing the Fabry-Pérot oscillations in the long-wavelength limit. These experimental results are also consistent with the Maxwell Garnett model. We advocate using this model for media with cylindrical pores in the future.

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Contributing Institute(s):

1. CIMMS-RA Center for integr. Multiscale M (CIMMS)
2. Technische Universität Hamburg-Harburg (TUHH)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. SFB 986 C10 - Photonische Metamaterialien mit anpassbarer und schaltbarer Anisotropie durch Funktionalisierung von porösen Festkörpern mit Flüssigkristallen (C10*) (445052466) (445052466)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2024

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