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dc.contributor.authorSánchez-Postigo, Alejandro
dc.contributor.authorGinel-Moreno, Pablo
dc.contributor.authorSchmid, Jens H.
dc.contributor.authorHadij-El-Houati, Abdelfettah
dc.contributor.authorOrtega-Moñux, Alejandro 
dc.contributor.authorWanguemert-Pérez, Juan Gonzalo 
dc.contributor.authorHalir, Robert 
dc.contributor.authorCheben, Pavel
dc.contributor.authorMolina-Fernández, Íñigo 
dc.date.accessioned2024-11-06T10:07:09Z
dc.date.available2024-11-06T10:07:09Z
dc.date.issued2024-10-28
dc.identifier.urihttps://hdl.handle.net/10630/35014
dc.description.abstractSurface grating couplers, such as fiber-chip grating couplers and optical antennas, are fundamental devices in photonic integrated circuits, as they enable the coupling of light between the chip and an external medium. An important metric of surface grating couplers is the coupling efficiency, and high values, greater than -1 dB, are required for applications in quantum technology, light detection and ranging, and optical interconnects. Surface grating couplers typically suffer from radiation loss to the substrate, which significantly limits their coupling efficiency. Here we propose a novel grating-coupling concept that utilizes a high-refractive-index upper cladding to frustrate radiation orders to the substrate by operating in a single-beam diffraction regime. To illustrate this concept, we report the design of an easily fabricable silicon surface grating coupler with an unprecedented coupling efficiency of -0.2 dB to a single-mode optical fiber. Furthermore, the proposed strategy allows us to design an evanescently coupled millimeter-long optical antenna with a coupling efficiency of -0.1 dB to free space. Additionally, an ultra-fast wavelength-tunable beam steering of 0.37°/nm is achieved, which corresponds to more than a 2.5-fold enhancement over comparable silicon antennas. These results represent a pathway for a new set of photonic integrated interfaces for applications in which high-efficiency chip-to-fiber and chip-to-free-space coupling is critical.es_ES
dc.description.sponsorshipNational Research Council Canada (HTSN 209, STR2-0102); Ministerio de Ciencia, Innovación y Universidades (PDC2023-145833-I00, TED2021-130400B-I00/ AEI/10.13039/501100011033/ Unión Europea NextGeneration EU/PRTR, PID2023-151178OB-I00); Universidad de Málagaes_ES
dc.language.isoenges_ES
dc.publisherOptica Publishing Groupes_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.subjectCircuitos integradoses_ES
dc.subjectÓptica integradaes_ES
dc.subject.otherÓpticaes_ES
dc.titleUltra-efficient surface grating couplers for chip-to-fiber and chip-to-free-space coupling based on single-beam radiation.es_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.centroE.T.S.I. Telecomunicaciónes_ES
dc.identifier.doi10.1364/OE.537342
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersiones_ES


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