bullet Sensors & Transducers Journal

    (ISSN 1726- 5479)


2008 e-Impact Factor

25 Top Downloaded Articles

Journal Subscription 2012

Editorial Calendar 2012

Submit an Article

Editorial Board

Current Issue

Sensors & Transducers journal's cover

Sensors & Transducers Journal 2011

Sensors & Transducers Journal 2010

Sensors & Transducers Journal 2009

Sensors & Transducers Journal 2008

Sensors & Transducers Journal 2007

2000-2002 S&T e-Digest Contents

2003 S&T e-Digest Contents

2004 S&T e-Digest Contents

2005 S&T e-Digest Contents

2006 S&T e-Digest Contents

Best Articles 2011




Vol. 14-1, Special Issue, March 2012, pp.212-230




Group IV Materials for High Performance Methane Sensing in Novel Slot Optical Waveguides at 2.883 μm and 3.39 μm


1 Vittorio M. N. PASSARO, 2 Benedetto TROIA and 1 Francesco DE LEONARDIS

1 Photonics Research Group, Dipartimento di Elettrotecnica ed Elettronica, Politecnico di Bari

Via Edoardo Orabona n. 4, 70125 Bari, Italy

2 Photonics Research Group and CNIT UdR Bari, Dipartimento di Elettrotecnica ed Elettronica, Politecnico di Bari, Via Edoardo Orabona n. 4, 70125 Bari, Italy

E-mail: passaro@deemail.poliba.it



Received: 9 November 2011   /Accepted: 20 December 2011   /Published: 12 March 2012

Digital Sensors and Sensor Sysstems


Abstract: In this paper a detailed investigation of novel photonic sensors based on slot waveguides has been carried out. Appropriate alloys of group IV materials, such as germanium (Ge), silicon (Si), carbon (C) and tin (Sn), are applied in silicon-on-insulator (SOI) technology for homogeneous optical sensing at 2.883 m and 3.39 μm. Electronic and optical properties of group IV alloys have been investigated. In addition, we have designed novel group IV vertical slot waveguides in order to achieve ultra-high sensitivities, as well as good fabrication tolerances. All these features have been compared with well-known SOI slot waveguides for optical label-free homogeneous sensing at 1.55 m. In conclusion, theoretical investigation of ring resonators based on these novel slot waveguides has revealed very good results in terms of ultra high sensing performance of methane gas, i.e., limit of detection ~ 3.610-5 RIU and wavelength sensitivity > 2103 nm/RIU.


Keywords: Slot waveguide, Mid-IR gas sensing, Ring resonator, Group IV photonics


Acrobat reader logo Click <here> or title of paper to download the full pages article (1.54 Mb)



Sensors & Transducers journal subscription

only 450 $ US per year:




Read more about Gas Sensors and Chemical Sensors





1999 - 2012 Copyright , International Frequency Sensor Association (IFSA). All Rights Reserved.

Home - News - Links - Archives - Tools - Voltage-to-Frequency Converters - Standardization - Patents - Marketplace - Projects - Wish List - e-Shop - Sensor Jobs - Membership - Videos - Publishing - Site Map - Subscribe - Search

 Members Area -Sensors Portal -Training Courses - S&T Digest - For advertisers - Bookstore - Forums - Polls - Submit Press Release - Submit White Paper - Testimonies - Twitter - Facebook - LinkedIn