Share Email Print
cover

Proceedings Paper • new

Ultra-compact single-arm interferometric plasmonic sensor co-integrated on a TiO2 photonic waveguide platform
Author(s): E. Chatzianagnostou; G. Dabos; A. Manolis; L. Markey; J.-C. Weeber; A. Dereux; D. Tsiokos; N. Pleros
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Plasmonics have been identified as an ideal platform for ultra-sensitive, label-free biosensors mainly due to the high field confinement on a metal-dielectric interface and the resulting strong light-matter interaction offered by surface plasmon resonances (SPRs) that can be entirely exposed to test analytes. Well-established SPR-based biosensors exploiting propagating SPRs yield superior specifications regarding bulk sensitivity compared to localized counterparts leading to already commercial available sensor devices. However, most of these systems require bulky prism-based configurations to couple light into the Surface Plasmon Polariton (SPP) mode impeding system miniaturization. In addition, SPR-based sensors suffer from intrinsic high propagation losses restricting the potential for multiple on-chip functionalities. In this context, co-integration of plasmonics with a low-loss photonic platform emerges as a viable solution towards highly sensitive, low-loss and small footprint optical sensors. In this work, we present an ultra-compact, interferometric plasmonic sensor co-integrated on a TiO2 photonic waveguide platform. The device consists of two access TiO2 photonic waveguides separated by a gold-based metal stripe which is located on top of an appropriately shorter TiO2 waveguide layer. Two metal/insulator interfaces are formed at the top (sensing arm) and bottom surfaces (reference arm) of the metal able to support SPP modes which upon excitation through the input photonic waveguide propagate along the two metal surfaces and interfere at the output waveguide realizing a single-arm Mach-Zehnder Interferometer. After optimization of the device in aqueous environment, we achieved sensitivity values as high as 2430 nm/RIU at near-infrared spectrum region for a 65 um long plasmonic stripe.

Paper Details

Date Published: 4 March 2019
PDF: 6 pages
Proc. SPIE 10921, Integrated Optics: Devices, Materials, and Technologies XXIII, 109211K (4 March 2019); doi: 10.1117/12.2509951
Show Author Affiliations
E. Chatzianagnostou, Aristotle Univ. of Thessaloniki (Greece)
Ctr. for Interdisciplinary Research and Innovation (Greece)
G. Dabos, Aristotle Univ. of Thessaloniki (Greece)
Ctr. for Interdisciplinary Research and Innovation (Greece)
A. Manolis, Aristotle Univ. of Thessaloniki (Greece)
Ctr. for Interdisciplinary Research and Innovation (Greece)
L. Markey, Lab. Interdisciplinaire Carnot de Bourgogne, CNRS, Univ. de Bourgogne Franche-Comté (France)
J.-C. Weeber, Lab. Interdisciplinaire Carnot de Bourgogne, CNRS, Univ. de Bourgogne Franche-Comté (France)
A. Dereux, Lab. Interdisciplinaire Carnot de Bourgogne, CNRS, Univ. de Bourgogne Franche-Comté (France)
D. Tsiokos, Aristotle Univ. of Thessaloniki (Greece)
Ctr. for Interdisciplinary Research and Innovation (Greece)
Bialoom, Ltd. (Cyprus)
N. Pleros, Aristotle Univ. of Thessaloniki (Greece)
Ctr. for Interdisciplinary Research and Innovation (Greece)


Published in SPIE Proceedings Vol. 10921:
Integrated Optics: Devices, Materials, and Technologies XXIII
Sonia M. García-Blanco; Pavel Cheben, Editor(s)

© SPIE. Terms of Use
Back to Top