Experimental observation of flat focusing mirror based on photonic jet effect
In this work, we experimentally demonstrate that a thin rectangle dielectric-metal structure can have a function of a flat focusing mirror based on photonic jet effect in reflection mode. Using polydimethylsiloxane (PDMS) rectangle with size length of 10 µm and wavelength-scale thickness of 1 µm on...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/327957 |
| Acceso en línea: | https://hdl.handle.net/2117/327957 https://dx.doi.org/10.1038/s41598-020-65292-7 |
| Access Level: | acceso abierto |
| Palabra clave: | Photonics Flat focusing mirror Photonic jet effect Fotònica Àrees temàtiques de la UPC::Física |
| Sumario: | In this work, we experimentally demonstrate that a thin rectangle dielectric-metal structure can have a function of a flat focusing mirror based on photonic jet effect in reflection mode. Using polydimethylsiloxane (PDMS) rectangle with size length of 10 µm and wavelength-scale thickness of 1 µm on the top of a silicon wafer, we have built a flat mirror which focuses an incident beam at the focal length changing from 1.38 µm to 11.67 µm upon tuning the beam incidence angle from 30° to 75°. The focusing properties of such a mirror persist in the wavelength range of 405¿nm to 671¿nm. Our approach can be extended to realize other optical functionalities by properly controlling rectangle dimensions and materials. This flat focusing mirror is able to guide the incident beam in free space without perceptible diffraction at the distance equal to the photonic jet length and suitable for small-scale photonic circuits. |
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