Optical microtube cavities monolithically integrated on photonic chips for optofluidic sensing.

Microtubular optical resonators are monolithically integrated on photonic chips to demonstrate optofluidic functionality. Due to the compact subwavelength-thin tube wall and a well-defined nanogap between polymer photonic waveguides and the microtube, excellent optical coupling with extinction ratios up to 32 dB are observed in the telecommunication relevant wavelength range. For the first time, optofluidic applications of fully on-chip integrated microtubular systems are investigated both by filling the core of the microtube and by the microtube being covered by a liquid droplet. Total shifts over the full free spectral range are observed in response to the presence of the liquid medium in the vicinity of the microtube resonators. This work provides a vertical coupling scheme for optofluidic applications in monolithically integrated so-called "lab-in-a-tube" systems.

[1]  Oliver G. Schmidt,et al.  On-chip Si/SiOx microtube refractometer , 2008 .

[2]  Ian M. White,et al.  Refractometric sensors based on microsphere resonators , 2005 .

[3]  Xudong Fan,et al.  Characterization of sensing capability of optofluidic ring resonator biosensors , 2010 .

[4]  G. Testa,et al.  Planar Silicon-Polydimethylsiloxane Optofluidic Ring Resonator Sensors , 2016, IEEE Photonics Technology Letters.

[5]  Monolithically integrated self-rolled-up microtube-based vertical coupler for three-dimensional photonic integration , 2015 .

[6]  O. Schmidt,et al.  Rolled-up TiO₂ optical microcavities for telecom and visible photonics. , 2014, Optics letters.

[7]  Denys Makarov,et al.  Lab-in-a-tube: ultracompact components for on-chip capture and detection of individual micro-/nanoorganisms. , 2012, Lab on a chip.

[8]  D. Psaltis,et al.  Developing optofluidic technology through the fusion of microfluidics and optics , 2006, Nature.

[9]  Z. Mi,et al.  Single rolled-up InGaAs/GaAs quantum dot microtubes integrated with silicon-on-insulator waveguides. , 2011, Optics express.

[10]  O. Schmidt,et al.  Strongly hybridized plasmon-photon modes in optoplasmonic microtubular cavities , 2015 .

[11]  Xudong Fan,et al.  Integrated multiplexed biosensors based on liquid core optical ring resonators and antiresonant reflecting optical waveguides , 2006 .

[12]  Hongying Zhu,et al.  Analysis of biomolecule detection with optofluidic ring resonator sensors. , 2007, Optics express.

[13]  Matthew R. Jorgensen,et al.  Localized optical resonances in low refractive index rolled-up microtube cavity for liquid-core optofluidic detection , 2012 .

[14]  M. A. Putyato,et al.  Free-standing and overgrown InGaAs/GaAs nanotubes, nanohelices and their arrays , 2000 .

[15]  O. Schmidt,et al.  Nanotechnology: Thin solid films roll up into nanotubes , 2001, Nature.

[16]  SiOx∕Si radial superlattices and microtube optical ring resonators , 2006, cond-mat/0611261.

[17]  Antonio Díez,et al.  Refractometric sensor based on whispering-gallery modes of thin capillarie. , 2007, Optics express.

[18]  S. Arnold,et al.  Whispering-gallery-mode biosensing: label-free detection down to single molecules , 2008, Nature Methods.

[19]  Xudong Fan,et al.  Liquid-core optical ring-resonator sensors. , 2006, Optics letters.

[20]  Hongying Zhu,et al.  Refractometric Sensors for Lab-on-a-Chip Based on Optical Ring Resonators , 2007, IEEE Sensors Journal.

[21]  Yongfeng Mei,et al.  Rolled-up optical microcavities with subwavelength wall thicknesses for enhanced liquid sensing applications. , 2010, ACS nano.

[22]  Xudong Fan,et al.  Optofluidic Microsystems for Chemical and Biological Analysis. , 2011, Nature photonics.

[23]  O. Schmidt,et al.  Vertical optical ring resonators fully integrated with nanophotonic waveguides on silicon-on-insulator substrates. , 2015, Optics letters.

[24]  Oliver G. Schmidt,et al.  Versatile Approach for Integrative and Functionalized Tubes by Strain Engineering of Nanomembranes on Polymers , 2008 .

[25]  Samuel Sanchez,et al.  Lab-in-a-tube: on-chip integration of glass optofluidic ring resonators for label-free sensing applications. , 2012, Lab on a chip.

[26]  Christelle Monat,et al.  Integrated optofluidics: A new river of light , 2007 .