AI Article Synopsis
- The study focuses on the optical properties of aluminum (Al) hyperbolic metamaterials, particularly their transmission efficiency under specific conditions.
- Researchers achieved a transmission efficiency of about 0.3 for spatial frequencies up to 1.42 with a very thin Al film illuminated at 363.8 nm, while 3% Cu-doping reduced the film's roughness to approximately 0.49.
- The optimized multilayers, combined with a resonant grating, effectively convert normal-polarized light to structured fields, demonstrating potential applications in structured illumination and enhanced light phenomena.
Article Abstract
We experimentally study the optical properties of Al- hyperbolic metamaterials. The hyperbolic dispersion and ultrathin Al film ∼12 make the Al- multilayers possess transmission efficiency ∼0.3 for the spatial frequency ranging from to 1.42 at 363.8 nm illumination. The atomic concentration of 3% Cu-doping is experimentally demonstrated to obtain Al film ∼12 with root-mean-square roughness ∼0.49. The fabricated Al- multilayers combined with the optimized resonant grating with period 280 nm serves as a structured illumination device, which efficiently converts the -polarized normal field to the spatial frequency 1.3 structured field. The measured average transmission intensity of the ±1 order is ∼0.14, and the intensity ratio of the ±1 order and 0 order is ∼65. This Letter is promising for structured illumination, spontaneous emission enhancement, Cherenkov radiation, etc.
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| http://dx.doi.org/10.1364/OL.402049 | DOI Listing |
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