Cloaking and anamorphism for light and mass diffusion
<p dir="ltr">We first review classical results on cloaking and mirage effects for electromagnetic waves. We then show that transformation optics allows the masking of objects or produces mirages in diffusive regimes. In order to achieve this, we consider the equation for diffusive ph...
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| مؤلفون آخرون: | , , |
| منشور في: |
2017
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| _version_ | 1864513557063794688 |
|---|---|
| author | Sébastien Guenneau (10809543) |
| author2 | André Diatta (19720120) Tania M Puvirajesinghe (19720123) Mohamed Farhat (668915) |
| author2_role | author author author |
| author_facet | Sébastien Guenneau (10809543) André Diatta (19720120) Tania M Puvirajesinghe (19720123) Mohamed Farhat (668915) |
| author_role | author |
| dc.creator.none.fl_str_mv | Sébastien Guenneau (10809543) André Diatta (19720120) Tania M Puvirajesinghe (19720123) Mohamed Farhat (668915) |
| dc.date.none.fl_str_mv | 2017-09-13T03:00:00Z |
| dc.identifier.none.fl_str_mv | 10.1088/2040-8986/aa7df8 |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/journal_contribution/Cloaking_and_anamorphism_for_light_and_mass_diffusion/27082753 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Engineering Materials engineering Physical sciences Classical physics mass diffusion diffusive photon density invisibility transformation optics mimetism |
| dc.title.none.fl_str_mv | Cloaking and anamorphism for light and mass diffusion |
| dc.type.none.fl_str_mv | Text Journal contribution info:eu-repo/semantics/publishedVersion text contribution to journal |
| description | <p dir="ltr">We first review classical results on cloaking and mirage effects for electromagnetic waves. We then show that transformation optics allows the masking of objects or produces mirages in diffusive regimes. In order to achieve this, we consider the equation for diffusive photon density in transformed coordinates, which is valid for diffusive light in scattering media. More precisely, generalizing transformations for star domains introduced in (Diatta and Guenneau <i>J. Opt.</i> <b>13</b> 024012) for matter waves, we numerically demonstrate that infinite conducting objects of different shapes scatter diffusive light in exactly the same way. We also propose a design of an external light-diffusion cloak with spatially varying sign-shifting parameters that hides a finite size scatterer outside the cloak. We next analyze non-physical parameters in the transformed Fick's equation derived in (Guenneau and Puvirajesinghe <i>R. Soc. Interface</i> <b>10</b> 20130106), and propose the use of a non-linear transform that overcomes this problem. We finally investigate other forms of invariant transformed diffusion-like equations in the time domain, and touch upon conformal mappings and non-Euclidean cloaking applied to diffusion processes.</p><h2>Other Information</h2><p dir="ltr">Published in: Journal of Optics<br>License: <a href="http://creativecommons.org/licenses/by/3.0/" rel="noreferrer noopener" target="_blank">http://creativecommons.org/licenses/by/3.0/</a> <br>See article on publisher's website: <a href="https://dx.doi.org/10.1088/2040-8986/aa7df8" target="_blank">https://dx.doi.org/10.1088/2040-8986/aa7df8</a></p> |
| eu_rights_str_mv | openAccess |
| id | Manara2_8a3ce9be4e0630fc48b77e0bb8f2015d |
| identifier_str_mv | 10.1088/2040-8986/aa7df8 |
| network_acronym_str | Manara2 |
| network_name_str | Manara2 |
| oai_identifier_str | oai:figshare.com:article/27082753 |
| publishDate | 2017 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | Cloaking and anamorphism for light and mass diffusionSébastien Guenneau (10809543)André Diatta (19720120)Tania M Puvirajesinghe (19720123)Mohamed Farhat (668915)EngineeringMaterials engineeringPhysical sciencesClassical physicsmass diffusiondiffusive photon densityinvisibilitytransformation opticsmimetism<p dir="ltr">We first review classical results on cloaking and mirage effects for electromagnetic waves. We then show that transformation optics allows the masking of objects or produces mirages in diffusive regimes. In order to achieve this, we consider the equation for diffusive photon density in transformed coordinates, which is valid for diffusive light in scattering media. More precisely, generalizing transformations for star domains introduced in (Diatta and Guenneau <i>J. Opt.</i> <b>13</b> 024012) for matter waves, we numerically demonstrate that infinite conducting objects of different shapes scatter diffusive light in exactly the same way. We also propose a design of an external light-diffusion cloak with spatially varying sign-shifting parameters that hides a finite size scatterer outside the cloak. We next analyze non-physical parameters in the transformed Fick's equation derived in (Guenneau and Puvirajesinghe <i>R. Soc. Interface</i> <b>10</b> 20130106), and propose the use of a non-linear transform that overcomes this problem. We finally investigate other forms of invariant transformed diffusion-like equations in the time domain, and touch upon conformal mappings and non-Euclidean cloaking applied to diffusion processes.</p><h2>Other Information</h2><p dir="ltr">Published in: Journal of Optics<br>License: <a href="http://creativecommons.org/licenses/by/3.0/" rel="noreferrer noopener" target="_blank">http://creativecommons.org/licenses/by/3.0/</a> <br>See article on publisher's website: <a href="https://dx.doi.org/10.1088/2040-8986/aa7df8" target="_blank">https://dx.doi.org/10.1088/2040-8986/aa7df8</a></p>2017-09-13T03:00:00ZTextJournal contributioninfo:eu-repo/semantics/publishedVersiontextcontribution to journal10.1088/2040-8986/aa7df8https://figshare.com/articles/journal_contribution/Cloaking_and_anamorphism_for_light_and_mass_diffusion/27082753CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/270827532017-09-13T03:00:00Z |
| spellingShingle | Cloaking and anamorphism for light and mass diffusion Sébastien Guenneau (10809543) Engineering Materials engineering Physical sciences Classical physics mass diffusion diffusive photon density invisibility transformation optics mimetism |
| status_str | publishedVersion |
| title | Cloaking and anamorphism for light and mass diffusion |
| title_full | Cloaking and anamorphism for light and mass diffusion |
| title_fullStr | Cloaking and anamorphism for light and mass diffusion |
| title_full_unstemmed | Cloaking and anamorphism for light and mass diffusion |
| title_short | Cloaking and anamorphism for light and mass diffusion |
| title_sort | Cloaking and anamorphism for light and mass diffusion |
| topic | Engineering Materials engineering Physical sciences Classical physics mass diffusion diffusive photon density invisibility transformation optics mimetism |