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  4. Integrating cell on chip : novel waveguide platform employing ultra-long optical paths
 
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Integrating cell on chip : novel waveguide platform employing ultra-long optical paths

Citation Link: https://doi.org/10.15480/882.1589
Publikationstyp
Journal Article
Date Issued
2017
Sprache
English
Author(s)
Fohrmann, Lena Simone  
Sommer, Gerrit  
Pitruzzello, Giampaolo  
Krauss, Thomas F.  
Petrov, Alexander  orcid-logo
Eich, Manfred  
Institut
Optische und Elektronische Materialien E-12  
TORE-DOI
10.15480/882.1589
TORE-URI
http://tubdok.tub.tuhh.de/handle/11420/1592
Journal
APL photonics  
Volume
2
Issue
9
Start Page
096102
Citation
APL Photonics 9 (2): 096102- (2017)
Publisher DOI
10.1063/1.5001486
Scopus ID
2-s2.0-85051258059
Publisher
AIP Publishing
Optical waveguides are the most fundamental building blocks of integrated optical circuits. They are extremely well understood, yet there is still room for surprises. Here, we introduce a novel 2D waveguide platform which affords a strong interaction of the evanescent tail of a guided optical wave with an external medium while only employing a very small geometrical footprint. The key feature of the platform is its ability to integrate the ultra-long path lengths by combining low propagation losses in a silicon slab with multiple reflections of the guided wave from photonic crystal (PhC) mirrors. With a reflectivity of 99.1% of our tailored PhC-mirrors, we achieve interaction paths of 25 cm within an area of less than 10 mm2. This corresponds to 0.17 dB/cm effective propagation which is much lower than the state-of-the-art loss of approximately 1 dB/cm of single mode silicon channel waveguides. In contrast to conventional waveguides, our 2D-approach leads to a decay of the guided wave power only inversely proportional to the optical path length. This entirely different characteristic is the major advantage of the 2D integrating cell waveguide platform over the conventional channel waveguide concepts that obey the Beer-Lambert law.
DDC Class
620: Ingenieurwissenschaften
Funding(s)
Open Access Publizieren 2016 - 2017 / Technische Universität Hamburg-Harburg  
Mid infrared gas sensing  
Lizenz
https://creativecommons.org/licenses/by/4.0/
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