Theoretical Aspects of Thin Film Optical Spectra: Underlying Models, Model Restrictions and Inadequacies, Algorithms, and Challenges
Any calculation of thin film optical spectra requires the formulation of certain model assumptions. In general, those model assumptions concern geometrical features as well as material properties. We review important facets of the thin film optics’ “standard model” that provides the basis of general...
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MDPI AG
2025-02-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/15/4/2187 |
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| author | Olaf Stenzel Steffen Wilbrandt |
| author_facet | Olaf Stenzel Steffen Wilbrandt |
| author_sort | Olaf Stenzel |
| collection | DOAJ |
| description | Any calculation of thin film optical spectra requires the formulation of certain model assumptions. In general, those model assumptions concern geometrical features as well as material properties. We review important facets of the thin film optics’ “standard model” that provides the basis of generally accepted relevant modern spectra calculation routines. Moreover, we discuss phenomena arising when certain model assumptions are violated. Examples are provided by the Goos–Hänchen shift, the polarization leakage, interaction with partially coherent light, rough surfaces, as well as the emergence of thickness-dependent, time-dependent, or non-linear optical material parameters. Corresponding challenges in coating characterization and design are discussed, and future prospects are identified. |
| format | Article |
| id | doaj-art-6521d566fb69407a8f29e2cbc854ee3e |
| institution | DOAJ |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj-art-6521d566fb69407a8f29e2cbc854ee3e2025-08-20T03:11:58ZengMDPI AGApplied Sciences2076-34172025-02-01154218710.3390/app15042187Theoretical Aspects of Thin Film Optical Spectra: Underlying Models, Model Restrictions and Inadequacies, Algorithms, and ChallengesOlaf Stenzel0Steffen Wilbrandt1Fraunhofer Institute for Applied Optics and Precision Engineering, Albert-Einstein-Str. 7, 07745 Jena, GermanyFraunhofer Institute for Applied Optics and Precision Engineering, Albert-Einstein-Str. 7, 07745 Jena, GermanyAny calculation of thin film optical spectra requires the formulation of certain model assumptions. In general, those model assumptions concern geometrical features as well as material properties. We review important facets of the thin film optics’ “standard model” that provides the basis of generally accepted relevant modern spectra calculation routines. Moreover, we discuss phenomena arising when certain model assumptions are violated. Examples are provided by the Goos–Hänchen shift, the polarization leakage, interaction with partially coherent light, rough surfaces, as well as the emergence of thickness-dependent, time-dependent, or non-linear optical material parameters. Corresponding challenges in coating characterization and design are discussed, and future prospects are identified.https://www.mdpi.com/2076-3417/15/4/2187optical coatingsoptical spectrathin film model |
| spellingShingle | Olaf Stenzel Steffen Wilbrandt Theoretical Aspects of Thin Film Optical Spectra: Underlying Models, Model Restrictions and Inadequacies, Algorithms, and Challenges Applied Sciences optical coatings optical spectra thin film model |
| title | Theoretical Aspects of Thin Film Optical Spectra: Underlying Models, Model Restrictions and Inadequacies, Algorithms, and Challenges |
| title_full | Theoretical Aspects of Thin Film Optical Spectra: Underlying Models, Model Restrictions and Inadequacies, Algorithms, and Challenges |
| title_fullStr | Theoretical Aspects of Thin Film Optical Spectra: Underlying Models, Model Restrictions and Inadequacies, Algorithms, and Challenges |
| title_full_unstemmed | Theoretical Aspects of Thin Film Optical Spectra: Underlying Models, Model Restrictions and Inadequacies, Algorithms, and Challenges |
| title_short | Theoretical Aspects of Thin Film Optical Spectra: Underlying Models, Model Restrictions and Inadequacies, Algorithms, and Challenges |
| title_sort | theoretical aspects of thin film optical spectra underlying models model restrictions and inadequacies algorithms and challenges |
| topic | optical coatings optical spectra thin film model |
| url | https://www.mdpi.com/2076-3417/15/4/2187 |
| work_keys_str_mv | AT olafstenzel theoreticalaspectsofthinfilmopticalspectraunderlyingmodelsmodelrestrictionsandinadequaciesalgorithmsandchallenges AT steffenwilbrandt theoreticalaspectsofthinfilmopticalspectraunderlyingmodelsmodelrestrictionsandinadequaciesalgorithmsandchallenges |