PMID- 29905740 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20180619 LR - 20181023 IS - 1539-4794 (Electronic) IS - 0146-9592 (Linking) VI - 43 IP - 12 DP - 2018 Jun 15 TI - Tailorable dual-wavelength-band coupling in a transverse-electric-mode focusing subwavelength grating coupler. PG - 2985-2988 LID - 10.1364/OL.43.002985 [doi] AB - A transverse-electric-mode focusing subwavelength grating coupler (FSWGC) is proposed and demonstrated for dual-wavelength-band (DWB) coupling from a single-mode fiber into a suspended-membrane waveguide for the first time, to the best of our knowledge. Location and separation of the two coupling peaks can be flexibly tailored based on a proposed design methodology. As a proof of concept, two DWB FSWGCs working at (1486.0, 1594.5) nm and (1481.5, 1661.5) nm are experimentally demonstrated with coupling efficiencies of (18.3%, 20.1%) and (14.5%, 17.5%), 3-dB bandwidths of (55.0, 30.5) nm and (44.0, >39.5) nm, respectively. A DWB FSWGC working at (1480, 1830) nm with a wavelength separation of 350 nm and coupling efficiencies of (38.0%, 33.2%) is also numerically predicted. FAU - Zhou, Wen AU - Zhou W FAU - Cheng, Zhenzhou AU - Cheng Z FAU - Sun, Xiankai AU - Sun X FAU - Tsang, Hon Ki AU - Tsang HK LA - eng PT - Journal Article PL - United States TA - Opt Lett JT - Optics letters JID - 7708433 EDAT- 2018/06/16 06:00 MHDA- 2018/06/16 06:01 CRDT- 2018/06/16 06:00 PHST- 2018/06/16 06:00 [entrez] PHST- 2018/06/16 06:00 [pubmed] PHST- 2018/06/16 06:01 [medline] AID - 390614 [pii] AID - 10.1364/OL.43.002985 [doi] PST - ppublish SO - Opt Lett. 2018 Jun 15;43(12):2985-2988. doi: 10.1364/OL.43.002985.