scholarly journals Mid-infrared photonic crystal cavities in silicon

2011 ◽  
Vol 19 (6) ◽  
pp. 5579 ◽  
Author(s):  
Raji Shankar ◽  
Rick Leijssen ◽  
Irfan Bulu ◽  
Marko Lončar
Keyword(s):  
Photonic Crystal ◽  
Mid Infrared ◽  
Photonic Crystal Cavities

scholarly journals Demonstration of mid-infrared waveguide photonic crystal cavities

2013 ◽  
Vol 38 (15) ◽  
pp. 2779 ◽  
Author(s):  
Hongtao Lin ◽  
Lan Li ◽  
Fei Deng ◽  
Chaoying Ni ◽  
Sylvain Danto ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Mid Infrared ◽  
Photonic Crystal Cavities ◽  
Waveguide Photonic Crystal

Electro-Optic Tuning of Mid-Infrared Photonic Crystal Cavities using Graphene

CLEO: 2013 ◽  
2013 ◽  
Author(s):  
Raji Shankar ◽  
Yu Yao ◽  
Julie Frish ◽  
Ian Frank ◽  
Yi Song ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Mid Infrared ◽  
Photonic Crystal Cavities ◽  
Electro Optic

Mid-infrared silicon waveguide resonators with Q∼105 by using photonic crystal cavities

2013 ◽  
Vol 1510 ◽  
Author(s):  
Pao Lin ◽  
Vivek Singh ◽  
Yan Cai ◽  
Neil Sunil Patel ◽  
Jianwei Mu ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Quality Factor ◽  
Lattice Parameter ◽  
Infrared Transmission ◽  
Mid Infrared ◽  
Photonic Crystal Cavities ◽  
Silicon Waveguide ◽  
Hole Radius ◽  
Waveguide Resonators ◽  
Quality Factor Q

ABSTRACTOne dimensional photonic crystal 1D-PhC silicon waveguide resonators with quality factor, Q∼105, are demonstrated at mid-infrared wavelengths between 2 um to 5 um. Silicon has several advantages for mid-infrared applications including its broad mid-infrared transmission spectrum which extends out to 9 um, CMOS compatible fabrication processing, and ease of electronic-photonic integration. The proposed resonators are composed of photonic crystal cavities with optimized (i) lattice parameter a, (ii) cavity width w and (iii) hole radius r. Finite difference time domain (FDTD) simulations are used to adjust these three parameters, a, w, and r, to select a resonant frequency of interest within the mid-infrared spectral range. Due to the high quality factor Q, these PhC silicon waveguide resonators have much higher sensitivity as chemical sensors and have the potential to replace bulky instruments such as an FTIR.

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.

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