2026-05-30T08:44:18Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/246592026-02-03T11:34:25Zcom_10630_2254col_10630_37953

On-Chip Metamaterial Antenna Array with Distributed Bragg Deflector for Generation of Collimated Steerable Beams Ginel-Moreno, Pablo Hadij-El-Houati, Abdelfettah Sánchez-Postigo, Alejandro Wanguemert-Pérez, Juan Gonzalo Molina-Fernández, Íñigo Schmid, Jens H. Cheben, Pavel Ortega-Moñux, Alejandro Antenas The generation of collimated steerable beams of light is a fundamental function in optics needed in many applications, including free-space optical communications, remote sensing, and light detection and ranging. Implementing large-aperture light emitters directly on a photonic integrated chip without using external optics and expensive alignment systems is an outstanding challenge in integrated photonics. Here, the experimental demonstration of a new integrated antenna array architecture that uses a compact feeding circuit is reported. The design is based on an apodized Bragg deflector working as a low-loss (<0.3 dB) ultra-compact beam expander, which generates a 40-µm-wide on-chip Gaussian beam that illuminates a one-dimensional array of 112 optical antennas with a length of 1.5 mm. Each antenna comprises a metamaterial subwavelength grating waveguide core that is laterally loaded with an array of periodic radiative silicon segments. The device is fabricated on a 220-nm silicon-on-insulator platform using a single etch process with a minimum feature size of 80 nm. An antenna array with a power gain of 50 dB, a radiation efficiency of −3.8 dB, and a far-field angular divergence of 1.8° × 0.2°, in a wavelength range of 1500–1580 nm is presented. 2022-07-13T08:41:40Z 2022-07-13T08:41:40Z 2022-07-13T08:41:40Z 2022-07-03 journal article Ginel-Moreno, P., Hadij-ElHouati, A., Sánchez-Postigo, A., Wangüemert-Pérez, J. G., Molina-Fernández, Í., Schmid, J. H., Cheben, P., Ortega-Moñux, A., On-Chip Metamaterial Antenna Array with Distributed Bragg Deflector for Generation of Collimated Steerable Beams. Laser & Photonics Reviews 2022, 2200164. https://doi.org/10.1002/lpor.202200164 https://hdl.handle.net/10630/24659 https://doi.org/10.1002/lpor.202200164 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional WILEY