2026-06-01T01:57:18Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/392232026-02-03T11:48:51Zcom_10630_2254col_10630_37959

Sánchez-Postigo, Alejandro Barona-Ruiz, Miguel Ginel-Moreno, Pablo Schmid, Jens H. Ortega-Moñux, Alejandro Wanguemert-Pérez, Juan Gonzalo Luque-González, José Manuel Halir, Robert Cheben, Pavel Molina-Fernández, Íñigo 2025-07-03T08:15:23Z 2025-07-03T08:15:23Z 2025 https://hdl.handle.net/10630/39223 Surface grating couplers are key components in silicon photonics, as they act as efficient fiber-chip and free-space optical interfaces. Here we review some of our latest advances in these devices, including fiber-chip zero-order grating couplers achieving the highest coupling efficiency–bandwidth product reported to date, single-beam fiber-chip couplers with -0.2 dB coupling loss, single-beam optical antennas yielding nearly 100% directionality and ultra-fast beam steering, and apodized-imaging fiber-chip couplers that focus the radiated light at millimeter-scale distances above the chip surface. eng open access Fotónica Antenas Óptica integrada High-performance surface grating couplers for fiber-chip and free-space coupling conference output