Bragg filter bandwidth engineering in subwavelength grating metamaterial waveguides

0505925 - ÚFE 2020 RIV US eng J - Článek v odborném periodiku
Cheben, P. - Čtyroký, Jiří - Schmid, J. H. - Wang, S. - Lapointe, J. - Wangüemert-Pérez, G. - Molina-Fernández, I. - Ortega-Moñux, A. - Halíř, R. - Melati, D. - Xu, D.-X. - Janz, S. - Dado, M.
Bragg filter bandwidth engineering in subwavelength grating metamaterial waveguides.
Optics Letters. Roč. 44, č. 4 (2019), s. 1043-1046. ISSN 0146-9592. E-ISSN 1539-4794
Grant CEP: GA ČR(CZ) GA16-00329S
Institucionální podpora: RVO:67985882
Klíčová slova: Bragg gratings * Subwavelength grating * Waveguide filters
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 3.714, rok: 2019
Způsob publikování: Omezený přístup
https://www.osapublishing.org/ol/abstract.cfm?uri=ol-44-4-1043

Bragg gratings are fundamental building blocks for integrated photonic circuits. In the high-index contrast silicon-on-insulator material platform, it is challenging to accurately control the grating strength and achieve narrow spectral bandwidths. Here we demonstrate a novel Bragg grating geometry utilizing a silicon subwavelength grating (SWG) waveguide with evanescently coupled periodic Bragg loading segments placed outside the SWG core. We report experimental 3 dB filter bandwidths in a range from 8 nm to 150 pm by adjusting the distance of the Bragg loading segments from the core and the relative phase shift of the segments on the two sides of the waveguide, with a structure that has a minimum feature size of 100 nm
Trvalý link: http://hdl.handle.net/11104/0297258