Photothermally tunable silicon-microring-based optical add-drop filter through integrated light absorber
2014 (English)In: Optics Express, ISSN 1094-4087, Vol. 22, no 21, 25233-25241 p.Article in journal (Refereed) Published
An optically pumped thermo-optic (TO) silicon ring add-drop filter with fast thermal response is experimentally demonstrated. We propose that metal-insulator-metal (MIM) light absorber can be integrated into silicon TO devices, acting as a localized heat source which can be activated remotely by a pump beam. The MIM absorber design introduces less thermal capacity to the device, compared to conventional electrically-driven approaches. Experimentally, the absorber-integrated add-drop filter shows an optical response time of 13.7 mu s following the 10%-90% rule (equivalent to a exponential time constant of 5 mu s) and a wavelength shift over pump power of 60 pm/mW. The photothermally tunable add-drop filter may provide new perspectives for all-optical routing and switching in integrated Si photonic circuits.
Place, publisher, year, edition, pages
2014. Vol. 22, no 21, 25233-25241 p.
Free Spectral Range, Electrooptic Modulator, Ring Resonators, Wave-Guides, Chip, Compact, Switch
Other Physics Topics
IdentifiersURN: urn:nbn:se:kth:diva-157000DOI: 10.1364/OE.22.025233ISI: 000344004600061PubMedID: 25401557ScopusID: 2-s2.0-84908191367OAI: oai:DiVA.org:kth-157000DiVA: diva2:769069
FunderSwedish Foundation for Strategic Research Swedish Research Council
QC 201412052014-12-052014-12-042014-12-05Bibliographically approved