scholarly journals Slow light engineering for high Q high sensitivity photonic crystal microcavity biosensors in silicon

2012 ◽  
Vol 38 (1) ◽  
pp. 170-176 ◽  
Author(s):  
Swapnajit Chakravarty ◽  
Yi Zou ◽  
Wei-Cheng Lai ◽  
Ray T. Chen
Keyword(s):  
Photonic Crystal ◽  
Slow Light ◽  
High Sensitivity ◽  
High Q ◽  
Photonic Crystal Microcavity

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.

High sensitivity and high Q-factor nanoslotted parallel quadrabeam photonic crystal cavity for real-time and label-free sensing

2014 ◽  
Vol 105 (6) ◽  
pp. 063118 ◽  
Author(s):  
Daquan Yang ◽  
Shota Kita ◽  
Feng Liang ◽  
Cheng Wang ◽  
Huiping Tian ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Real Time ◽  
High Sensitivity ◽  
Q Factor ◽  
Label Free ◽  
Photonic Crystal Cavity ◽  
High Q

Slow Light Waveguide and Enhanced Area Microcavity Engineering for High Sensitivity Photonic Crystal Sensors

CLEO: 2013 ◽  
2013 ◽  
Author(s):  
Liang Zhu ◽  
Swapnajit Chakravarty ◽  
Cheng-Chih Hsieh ◽  
Wei-Cheng Lai ◽  
Ray T. Chen
Keyword(s):  
Photonic Crystal ◽  
Slow Light ◽  
High Sensitivity ◽  
Light Waveguide

Silicon on-chip side-coupled high-Q micro-cavities for the multiplexing of high sensitivity photonic crystal integrated sensors array

2016 ◽  
Vol 374 ◽  
pp. 1-7 ◽  
Author(s):  
Daquan Yang ◽  
Chunhong Wang ◽  
Wei Yuan ◽  
Bo Wang ◽  
Yujie Yang ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
High Sensitivity ◽  
Integrated Sensors ◽  
High Q ◽  
Sensors Array ◽  
On Chip

scholarly journals Silicon on-chip bandpass filters for the multiplexing of high sensitivity photonic crystal microcavity biosensors

2015 ◽  
Vol 106 (12) ◽  
pp. 121103 ◽  
Author(s):  
Hai Yan ◽  
Yi Zou ◽  
Swapnajit Chakravarty ◽  
Chun-Ju Yang ◽  
Zheng Wang ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
High Sensitivity ◽  
Bandpass Filters ◽  
On Chip ◽  
Photonic Crystal Microcavity

scholarly journals High-Q hybrid 3D-2D slab-3D photonic crystal microcavity

2010 ◽  
Vol 35 (18) ◽  
pp. 3144 ◽  
Author(s):  
Lingling Tang ◽  
Tomoyuki Yoshie
Keyword(s):  
Photonic Crystal ◽  
High Q ◽  
Photonic Crystal Microcavity
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