Resonance-splitting and enhanced notch depth in SOI ring resonators with mutual mode coupling

QC 20100923. Uppdaterad från submitted till published (20100923).
Resonance-splitting and enhanced notch depth are experimentally demonstrated in micro-ring resonators on SOI platform as a result of the mutual mode coupling. This coupling can be generated either by the nanometer-scaled gratings along the ring sidewalls or by evanescent directional coupling between two concentric rings. The transmission spectra are fitted using the time-domain coupled mode analysis. Split-wavelength separation of 0.68 nm for the 5-mu m-radius ring, notch depth of 40 dB for the 10-mu m-radius ring, and intrinsic Q factor of 2.6 x 10(5) for the 20-mu m-radius ring are demonstrated. Notch depth improvement larger than 25dB has been reached in the 40-39-mu m-radius double-ring structure. The enhanced notch depth and increased modal area for the concentric rings might be promising advantages for bio-sensing applications.

NATURVETENSKAP Fysik Atom- och molekylfysik och optik hsv//swe
NATURAL SCIENCES Physical Sciences Atom and Molecular Physics and Optics hsv//eng
Directional couplers
Resonators
Time domain analysis
Wavelength
Mutual mode coupling
SOI ring resonators
Optics
Optik

Dainese, MatteoReplisaurus AB(Swepub:kth)u1gomxdu (author)
Wosinski, LechKTH,Mikroelektronik och tillämpad fysik, MAP(Swepub:kth)u1ywmbo9 (author)
Qiu, MinKTH,Mikroelektronik och tillämpad fysik, MAP(Swepub:kth)u11okd66 (author)
KTHMikroelektronik och tillämpad fysik, MAP (creator_code:org_t)

By the author/editor: Zhang, Ziyang; Dainese, Matteo; Wosinski, Lech; Qiu, Min

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Atom and Molecul ...

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