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Title: Single-mode porous silicon waveguide interferometers with unity confinement factors for ultra-sensitive surface adlayer sensing

Abstract

Guided wave-optics has emerged as a promising platform for label free biosensing. However, device sensitivity toward surface-bound small molecules is directly limited by the evanescent interaction and low confinement factor with the active sensing region. Here, we report a mesoporous silicon waveguide design and inverse fabrication technique that resolves the evanescent field interaction limitation while achieving maximal transverse confinement factors and preserving single-mode operation. The waveguide sensors are characterized in a Fabry-Perot interferometer configuration and the ultra-high sensitivity to small molecule adlayers is demonstrated. We also identify dispersion to be a promising degree of freedom for exceeding the sensitivity limits predicted by the conventional non-dispersive effective medium theory.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [2];  [1]
  1. Clemson Univ., SC (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1546510
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Optics Express
Additional Journal Information:
Journal Volume: 27; Journal Issue: 16; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America (OSA)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Talukdar, Tahmid, Allen, Gabrielle, Kravchenko, Ivan I., and Ryckman, Judson. Single-mode porous silicon waveguide interferometers with unity confinement factors for ultra-sensitive surface adlayer sensing. United States: N. p., 2019. Web. doi:10.1364/OE.27.022485.
Talukdar, Tahmid, Allen, Gabrielle, Kravchenko, Ivan I., & Ryckman, Judson. Single-mode porous silicon waveguide interferometers with unity confinement factors for ultra-sensitive surface adlayer sensing. United States. doi:10.1364/OE.27.022485.
Talukdar, Tahmid, Allen, Gabrielle, Kravchenko, Ivan I., and Ryckman, Judson. Tue . "Single-mode porous silicon waveguide interferometers with unity confinement factors for ultra-sensitive surface adlayer sensing". United States. doi:10.1364/OE.27.022485. https://www.osti.gov/servlets/purl/1546510.
@article{osti_1546510,
title = {Single-mode porous silicon waveguide interferometers with unity confinement factors for ultra-sensitive surface adlayer sensing},
author = {Talukdar, Tahmid and Allen, Gabrielle and Kravchenko, Ivan I. and Ryckman, Judson},
abstractNote = {Guided wave-optics has emerged as a promising platform for label free biosensing. However, device sensitivity toward surface-bound small molecules is directly limited by the evanescent interaction and low confinement factor with the active sensing region. Here, we report a mesoporous silicon waveguide design and inverse fabrication technique that resolves the evanescent field interaction limitation while achieving maximal transverse confinement factors and preserving single-mode operation. The waveguide sensors are characterized in a Fabry-Perot interferometer configuration and the ultra-high sensitivity to small molecule adlayers is demonstrated. We also identify dispersion to be a promising degree of freedom for exceeding the sensitivity limits predicted by the conventional non-dispersive effective medium theory.},
doi = {10.1364/OE.27.022485},
journal = {Optics Express},
number = 16,
volume = 27,
place = {United States},
year = {2019},
month = {7}
}

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Works referenced in this record:

Slow light in photonic crystal waveguides
journal, April 2007