Large Group Index Birefringence in Silicon-on-Insulator Photonic Nano-Waveguides

2006 ◽  
Author(s):  
David Duchesne ◽  
Roberto Morandotti ◽  
Pavel Cheben ◽  
Boris Lamontagne ◽  
Danxia Xu ◽  
...  
Keyword(s):  
Silicon On Insulator ◽  
Group Index ◽  
Large Group

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 Losses and group index dispersion in insulator-on-silicon-on-insulator ridge waveguides

2010 ◽  
Vol 18 (5) ◽  
pp. 4590 ◽  
Author(s):  
Daniel Pergande ◽  
Ralf B. Wehrspohn
Keyword(s):  
Silicon On Insulator ◽  
Group Index ◽  
Ridge Waveguides

Large group-index bandwidth product empty core slow light photonic crystal waveguides for hybrid silicon photonics

2014 ◽  
Vol 7 (3) ◽  
pp. 376-384 ◽  
Author(s):  
Charles Caer ◽  
Xavier Le Roux ◽  
Samuel Serna ◽  
Weiwei Zhang ◽  
Laurent Vivien ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Silicon Photonics ◽  
Slow Light ◽  
Group Index ◽  
Photonic Crystal Waveguides ◽  
Large Group ◽  
Hybrid Silicon ◽  
Empty Core

Slow light with large group index–bandwidth product in ellipse-hole photonic crystal waveguides

2015 ◽  
Vol 54 (6) ◽  
pp. 1543 ◽  
Author(s):  
Xu Han ◽  
Tao Wang ◽  
Jian Tang ◽  
Bo Liu ◽  
BoYun Wang ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Slow Light ◽  
Group Index ◽  
Photonic Crystal Waveguides ◽  
Large Group

scholarly journals Electromagnetically Induced Transparency in an All-Dielectric Metamaterial-Waveguide With Large Group Index

2017 ◽  
Vol 9 (5) ◽  
pp. 1-8 ◽  
Author(s):  
Chuanshuai Sui ◽  
Bingxin Han ◽  
Tingting Lang ◽  
Xiangjun Li ◽  
Xufeng Jing ◽  
...  
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Group Index ◽  
Large Group ◽  
Metamaterial Waveguide ◽  
Induced Transparency

Experiments with Phase-Delay and Time-Delay Methods for Slow Light in Photonic Crystal Waveguide

2013 ◽  
Vol 684 ◽  
pp. 290-294
Author(s):  
Hui Lu ◽  
Li Jun Zhang ◽  
Zhan Qi Zheng ◽  
Yi Heng Zhang ◽  
Yong Qing Leng
Keyword(s):  
Photonic Crystal ◽  
Time Delay ◽  
Theoretical Result ◽  
Slow Light ◽  
Phase Delay ◽  
Silicon On Insulator ◽  
Group Index ◽  
Experimental Measurements ◽  
Photonic Crystal Waveguide ◽  
Good Agreement

In this paper, we report the experimental measurements of the group index of a photonic crystal waveguide based on silicon-on-insulator slab. The time-delay of the pulse is also measured, and it is in good agreement with the theoretical result calculated according to the group index with the phase-delay method, which is about 4.7ps.

scholarly journals Electromagnetically Induced Transparency in Media with Rydberg Excitons 1: Slow Light

Entropy ◽  
2020 ◽  
Vol 22 (2) ◽  
pp. 177 ◽  
Author(s):  
David Ziemkiewicz
Keyword(s):  
Light Pulse ◽  
Slow Light ◽  
Electromagnetically Induced Transparency ◽  
Proper Choice ◽  
Group Index ◽  
Large Group ◽  
Slowing Down ◽  
Induced Transparency ◽  
Good Agreement

In this paper, we show that Electromagnetically Induced Transparency (EIT) can be realized in mediums with Rydberg excitons. With realistic, reliable parameters which show good agreement with optical and electro-optical experiments, as well as the proper choice of Rydberg exciton states in the Cu2O crystal, we indicate how the EIT can be performed. The calculations show that, due to a large group index, one can expect the slowing down of a light pulse by a factor of about 10 4 in this medium.

scholarly journals Group index and group velocity dispersion in silicon-on-insulator photonic wires: errata

2006 ◽  
Vol 14 (13) ◽  
pp. 6372 ◽  
Author(s):  
Eric Dulkeith ◽  
Fengnian Xia ◽  
Laurent Schares ◽  
William M. Green ◽  
Lidija Sekaric ◽  
...  
Keyword(s):  
Group Velocity ◽  
Velocity Dispersion ◽  
Group Velocity Dispersion ◽  
Silicon On Insulator ◽  
Group Index ◽  
Photonic Wires
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