Optical sensors based on photonic crystal: a new route

The realization of miniaturized devices able to accumulate a higher number of information in a smallest volume is a challenge of the technological development. This trend increases the request of high sensitivity and selectivity sensors which can be integrated in microsystems. In this landscape, optical sensors based on photonic crystal technology can be an appealing solution. Here, a new refractive index sensor device, based on the bound states in the continuum (BIC) resonance shift excited in a photonic crystal membrane, is presented. A microfluidic cell was used to control the injection of fluids with different refractive indices over the photonic crystal surface. The shift of very high Q-factor resonances excited into the photonic crystal open cavity was monitored as a function of the refractive index n of the test liquid. The excellent stability we found and the minimal, loss-free optical equipment requirement, provide a new route for achieving high performance in sensing applications.

[1]  G. Whitesides,et al.  Soft Lithography. , 1998, Angewandte Chemie.

[2]  Giuseppe Coppola,et al.  Digital holographic microscopy characterization of superdirective beam by metamaterial. , 2012, Optics letters.

[3]  Masaya Notomi,et al.  Strong Light Confinement With Periodicity , 2011, Proceedings of the IEEE.

[4]  Andreas K. Freund,et al.  Performance of synchrotron X-ray monochromators under heat load Part 1: finite element modeling , 2001 .

[5]  Stefano Lagomarsino,et al.  Advances in Microdiffraction with X‐Ray Waveguide , 2002 .

[6]  M. Segev,et al.  Experimental observation of optical bound states in the continuum. , 2011, Physical review letters.

[7]  Adam D. McFarland,et al.  Single Silver Nanoparticles as Real-Time Optical Sensors with Zeptomole Sensitivity , 2003 .

[8]  Andreas K. Freund,et al.  Performances of synchrotron X-ray monochromators under heat load. Part 2. Application of the Takagi–Taupin diffraction theory , 2001 .

[9]  P. Jain,et al.  Calculated absorption and scattering properties of gold nanoparticles of different size, shape, and composition: applications in biological imaging and biomedicine. , 2006, The journal of physical chemistry. B.

[10]  K. N. Dollman,et al.  - 1 , 1743 .

[11]  C Ferrero,et al.  An analytical approach to estimating aberrations in curved multilayer optics for hard x-rays: 1. Derivation of caustic shapes. , 2008, Optics express.

[12]  Liam O'Faolain,et al.  Dependence of extrinsic loss on group velocity in photonic crystal waveguides. , 2007, Optics express.

[13]  Ray T. Chen,et al.  Analysis of ultra-high sensitivity configuration in chip-integrated photonic crystal microcavity bio-sensors. , 2014, Applied physics letters.

[14]  Philippe Lalanne,et al.  Photon confinement in photonic crystal nanocavities , 2008 .

[15]  Thomas F. Krauss,et al.  Accurate determination of the functional hole size in photonic crystal slabs using optical methods , 2008 .

[16]  Steven G. Johnson,et al.  Bloch surface eigenstates within the radiation continuum , 2013, Light: Science & Applications.

[17]  V. Mocella,et al.  Giant field enhancement in photonic resonant lattices , 2015 .

[18]  T. Krauss,et al.  Chemical sensing in slotted photonic crystal heterostructure cavities , 2009 .

[19]  J. P. Guigay,et al.  Bent crystals in Laue geometry: dynamical focusing of a polychromatic incident beam , 2004 .

[20]  Ray T. Chen,et al.  Cavity-Waveguide Coupling Engineered High Sensitivity Silicon Photonic Crystal Microcavity Biosensors With High Yield , 2014, IEEE Journal of Selected Topics in Quantum Electronics.