Double-walled carbon nanotube film as the active electrode in an electro-optical modulator for the mid-infrared and terahertz regions

2020 ◽  
Vol 128 (23) ◽  
pp. 233103
Author(s):  
Philippe Gagnon ◽  
François Lapointe ◽  
Patrick Desjardins ◽  
Richard Martel
Keyword(s):  
Carbon Nanotube ◽  
Optical Modulator ◽  
Active Electrode ◽  
Mid Infrared ◽  
Carbon Nanotube Film ◽  
Electro Optical Modulator

scholarly journals Theoretical and Experimental Study of Heterodyne Phase-Sensitive Dispersion Spectroscopy with an Injection-Current-Modulated Quantum Cascade Laser

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6176
Author(s):  
Zhen Wang ◽  
Kin-Pang Cheong ◽  
Mingsheng Li ◽  
Qiang Wang ◽  
Wei Ren
Keyword(s):  
Experimental Study ◽  
Analytical Model ◽  
Quantum Cascade Laser ◽  
Near Infrared ◽  
Optical Modulator ◽  
Line Center ◽  
Mid Infrared ◽  
Quantum Cascade ◽  
Electro Optical Modulator ◽  
Phase Sensitive

We report the theoretical and experimental study of calibration-free heterodyne phase-sensitive dispersion spectroscopy (HPSDS) in the mid-infrared using a direct current modulated mid-infrared quantum cascade laser (QCL). The modulation of QCL current at several hundred MHz or higher generates the synchronous frequency and intensity modulation of the QCL emission. An analytical model of the phase of the beat note signal in HPSDS is derived by considering the absorption and dispersion processes and incorporating the QCL modulation parameters. In the experiment, a 4.5 μm QCL modulated at 350 MHz was used to measure N2O at 200 Torr in a 10 cm gas cell. The N2O concentrations inferred from the analytical model were compared with the nominal values to show good agreement over the concentration range of 189−805 ppm with a standard deviation <3%. When the QCL wavelength was locked at the line-center of the molecular transition, it was of interest to find that the theoretical model was simplified to that used for near-infrared HPSDS with an electro-optical modulator for laser modulation.

Select Pathways to Carbon Nanotube Film Growth

2001 ◽  
Vol 13 (23) ◽  
pp. 1767-1770 ◽  
Author(s):  
Z. J. Zhang ◽  
B. Wei ◽  
J. W. Ward ◽  
R. Vajtai ◽  
G. Ramanath ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Film Growth ◽  
Carbon Nanotube Film

Epitaxial carbon nanotube film self-organized by sublimation decomposition of silicon carbide

1997 ◽  
Vol 71 (18) ◽  
pp. 2620-2622 ◽  
Author(s):  
Michiko Kusunoki ◽  
Masumi Rokkaku ◽  
Toshiyuki Suzuki
Keyword(s):  
Silicon Carbide ◽  
Carbon Nanotube ◽  
Carbon Nanotube Film ◽  
Self Organized

Orientational holographic gratings observed in nematics aligned by carbon nanotube film

2007 ◽  
Vol 88 (1) ◽  
pp. 101-104 ◽  
Author(s):  
X. Sun ◽  
F. Yao ◽  
Y. Pei ◽  
J. Zhang ◽  
C. Hou
Keyword(s):  
Carbon Nanotube ◽  
Holographic Gratings ◽  
Carbon Nanotube Film
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