2026-06-01T01:19:10Zhttps://riuma.uma.es/rest/oai/requestoai:riuma.uma.es:10630/145402026-02-03T12:14:34Zcom_10630_2254col_10630_37959
RIUMA. Repositorio Institucional de la Universidad de Málaga
author
Sánchez-Postigo, Alejandro
author
Wanguemert-Pérez, Juan Gonzalo
author
Luque-González, José Manuel
author
Molina-Fernández, Íñigo
author
Cheben, Pavel
author
Halir, Robert
author
Schmid, Jens H.
author
Ortega-Moñux, Alejandro
2017-09-27T06:39:05Z
2017-09-27T06:39:05Z
2017-09-27
http://hdl.handle.net/10630/14540
The mode fields of optical fibers and high-index contrast photonic waveguides have different dimensions, making difficult the coupling of light from one to the other. To solve this problem, surface grating couplers are one of the most used alternatives. However, in conventional grating couplers the bandwidth is limited. To overcome this drawback, we have recently proposed zero-order grating couplers, which, making use of a high-index prism and subwavelength grating structures, substantially mitigate the wavelength dependency of conventional grating couplers. In the near-infrared (λ = 1.55 μm) it is not possible to take full benefit from the potential bandwidth enhancement of zero-order grating couplers. Thus, in this work we migrate our zero-order grating coupler design from the near-infrared wavelength range to the mid-infrared one, which is attaining increasing attention because of its sensing applications. Subdecibel coupling efficiencies and broad bandwidths up to ~680 nm are achieved at λ = 3.8 μm for silicon-on-insulator and germanium-on-silicon nitride platforms.
spa
by-nc-nd
Telecomunicaciones
Diseño de grating couplers de orden cero de banda ancha y alta eficiencia para el infrarrojo medio
conference output
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URL
https://riuma.uma.es/bitstreams/fc4d2439-58c7-4763-917c-765324d18b44/download
File
MD5
671f77edbc9e9d1fa7bc6fe73272d0f3
671532
application/pdf
URSI2017_paper.pdf