scholarly journals Mid-infrared silicon-on-insulator waveguides with single-mode propagation over an octave of frequency

2021 ◽  
Author(s):  
Callum Stirling ◽  
Wei Cao ◽  
Jamie Reynolds ◽  
Zhibo Qu ◽  
Tom Bradley ◽  
...  
Keyword(s):  
Single Mode ◽  
Silicon On Insulator ◽  
Mode Propagation ◽  
Mid Infrared

scholarly journals Towards lab-on-chip ultrasensitive ethanol detection using photonic crystal waveguide operating in the mid infrared

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ali Rostamian ◽  
Ehsan Madadi-Kandjani ◽  
Hamed Dalir ◽  
Volker J. Sorger ◽  
Ray T. Chen
Keyword(s):  
Photonic Crystal ◽  
Slow Light ◽  
High Sensitivity ◽  
Guided Wave ◽  
Silicon On Insulator ◽  
Group Index ◽  
Photonic Crystal Waveguide ◽  
Mid Infrared ◽  
Lab On Chip ◽  
On Chip

Abstract Thanks to the unique molecular fingerprints in the mid-infrared spectral region, absorption spectroscopy in this regime has attracted widespread attention in recent years. Contrary to commercially available infrared spectrometers, which are limited by being bulky and cost-intensive, laboratory-on-chip infrared spectrometers can offer sensor advancements including raw sensing performance in addition to use such as enhanced portability. Several platforms have been proposed in the past for on-chip ethanol detection. However, selective sensing with high sensitivity at room temperature has remained a challenge. Here, we experimentally demonstrate an on-chip ethyl alcohol sensor based on a holey photonic crystal waveguide on silicon on insulator-based photonics sensing platform offering an enhanced photoabsorption thus improving sensitivity. This is achieved by designing and engineering an optical slow-light mode with a high group-index of n g  = 73 and a strong localization of modal power in analyte, enabled by the photonic crystal waveguide structure. This approach includes a codesign paradigm that uniquely features an increased effective path length traversed by the guided wave through the to-be-sensed gas analyte. This PIC-based lab-on-chip sensor is exemplary, spectrally designed to operate at the center wavelength of 3.4 μm to match the peak absorbance for ethanol. However, the slow-light enhancement concept is universal offering to cover a wide design-window and spectral ranges towards sensing a plurality of gas species. Using the holey photonic crystal waveguide, we demonstrate the capability of achieving parts per billion levels of gas detection precision. High sensitivity combined with tailorable spectral range along with a compact form-factor enables a new class of portable photonic sensor platforms when combined with integrated with quantum cascade laser and detectors.

scholarly journals Silicon-on-insulator mid-infrared planar concave grating based (de)multiplexer

2013 ◽  
Author(s):  
M. Muneeb ◽  
X. Chen ◽  
E. Ryckeboer ◽  
A. Malik ◽  
G. Z. Mashanovich ◽  
...  
Keyword(s):  
Silicon On Insulator ◽  
Mid Infrared ◽  
Planar Concave Grating ◽  
Concave Grating

scholarly journals Mid-infrared wavelength division (de)multiplexer using an interleaved angled multimode interferometer on the silicon-on-insulator platform

2014 ◽  
Vol 39 (6) ◽  
pp. 1406 ◽  
Author(s):  
Y. Hu ◽  
T. Li ◽  
D. J. Thomson ◽  
X. Chen ◽  
J. Soler Penades ◽  
...  
Keyword(s):  
Silicon On Insulator ◽  
Mid Infrared ◽  
Infrared Wavelength ◽  
Wavelength Division

Highly stable, monolithic, single-mode mid-infrared supercontinuum source based on low-loss fusion spliced silica and fluoride fibers

2016 ◽  
Vol 41 (5) ◽  
pp. 946 ◽  
Author(s):  
Ke Yin ◽  
Bin Zhang ◽  
Jinmei Yao ◽  
Linyong Yang ◽  
Shengping Chen ◽  
...  
Keyword(s):  
Single Mode ◽  
Low Loss ◽  
Mid Infrared

Single-mode mid-infrared lasers for gas sensing in the 2–4um range

2011 ◽  
Author(s):  
J. A. Gupta ◽  
P. J. Barrios ◽  
A. Bezinger ◽  
P. Waldron ◽  
B. F. Ventrudo ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Single Mode ◽  
Infrared Lasers ◽  
Mid Infrared
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