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Updated: Apr 22, 2026
Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
The role of group index engineering in series-connected photonic crystal microcavities for high density sensor
Yi Zou1, Swapnajit Chakravarty2, Liang Zhu1
1Department of Electrical and Computer Engineering, Microelectronics Research Center, University of Texas at Austin , 10100 Burnet Rd., Austin, Texas 78758, USA.
Abstract:
We experimentally demonstrate an efficient and robust method for series connection of photonic crystal microcavities that are coupled to photonic crystal waveguides in the slow light transmission regime. We demonstrate that group index taper engineering provides excellent optical impedance matching between the input and output strip waveguides and the photonic crystal waveguide, a nearly flat transmission over the entire guided mode spectrum and clear multi-resonance peaks corresponding to individual microcavities that are connected in series. Series connected photonic crystal microcavities are further multiplexed in parallel using cascaded multimode interference power splitters to generate a high density silicon nanophotonic microarray comprising 64 photonic crystal microcavity sensors, all of which are interrogated simultaneously at the same instant of time.
