Parts-per-million level detection of carbon monoxide using grating array waveguides in InP/InGaAs at [lambda] = 4.6μm

Ali Rostamian; Jason Midkiff; Kyoung Min Yoo; Hamed Dalir; Ray T. Chen

doi:10.1117/12.2546593

28 February 2020 Parts-per-million level detection of carbon monoxide using grating array waveguides in InP/InGaAs at λ = 4.6μm

Ali Rostamian, Jason Midkiff, Kyoung Min Yoo, Hamed Dalir, Ray T. Chen

Author Affiliations +

Proceedings Volume 11288, Quantum Sensing and Nano Electronics and Photonics XVII; 112882G (2020) https://doi.org/10.1117/12.2546593
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

Gas sensing based on infrared absorption spectroscopy has attracted considerable attention owing to the rovibrational signatures of compounds of interest in the molecular fingerprint region. On-chip spectrometers are promising devices that unlike their on-chip commercially available counterparts offer sensing in portable applications. Carbon monoxide as one of the major air pollutants is dangerous even at very low concentrations. For real-time and precise detection of trace amounts of this gas we need a compact highly sensitive and selective sensor. In this paper, we design a grating array device in the InP/InGaAs platform for trace detection of carbon monoxide. The passive device consists of an InGaAs strip waveguide with InP as cladding, split-cascaded into an equally spaced array of 32 separate optical paths by y-junctions. At the output of each waveguide shallow etched subwavelength emitter gratings couple the light out. Light-analyte interaction occurs on top of the gratings as well as in free space. The device is optimized to operate at mid-IR wavelength of λ=4.6μm where the absorption peak of carbon monoxide is located. Using this structure, gas sensing is experimentally demonstrated down to a concentration of 10ppm. Feasibility of achieving lower limit of detection will be shown by design modifications. This device, can be simply integrated with QCL/QCD and be used for portable high sensitivity gas sensors.

Citation Download Citation

Ali Rostamian, Jason Midkiff, Kyoung Min Yoo, Hamed Dalir, and Ray T. Chen "Parts-per-million level detection of carbon monoxide using grating array waveguides in InP/InGaAs at λ = 4.6μm", Proc. SPIE 11288, Quantum Sensing and Nano Electronics and Photonics XVII, 112882G (28 February 2020); https://doi.org/10.1117/12.2546593

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
1 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Waveguides

Carbon monoxide

Indium gallium arsenide

Cladding

Etching

Mid-IR

Sensors

Show All Keywords

Keywords/Phrases

Search In:

Publication Years