scholarly journals Widely tuneable scattering-type scanning near-field optical microscopy using pulsed quantum cascade lasers

2013 ◽  
Vol 103 (21) ◽  
pp. 213110 ◽  
Author(s):  
Edward Yoxall ◽  
Miguel Navarro-Cía ◽  
Mohsen Rahmani ◽  
Stefan A. Maier ◽  
Chris C. Phillips
Keyword(s):  
Optical Microscopy ◽  
Quantum Cascade Lasers ◽  
Near Field ◽  
Quantum Cascade ◽  
Cascade Lasers

scholarly journals Исследование пространственных характеристик излучения квантовых каскадных лазеров для спектрального диапазона 8 μm

2020 ◽  
Vol 46 (22) ◽  
pp. 51
Author(s):  
В.В. Дюделев ◽  
Д.А. Михайлов ◽  
В.Ю. Мыльников ◽  
А.В. Бабичев ◽  
С.Н. Лосев ◽  
...  
Keyword(s):  
Entire Range ◽  
Quantum Cascade Lasers ◽  
Near Field ◽  
Lasing Threshold ◽  
Slow Axis ◽  
Quantum Cascade ◽  
Radiation Divergence ◽  
Cascade Lasers ◽  
Fold Excess ◽  
Field Intensity Distribution

The near and far fields of quantum cascade lasers emitting in the spectral range near 8 µm have been studied. Lasing in the fundamental waveguide mode along the "fast" axis with a divergence of ~ 50º was observed in all samples of lasers with stripe widths of 22 and 50 µm in the entire range of pump currents. On the "slow" axis, multimode lasing and competition between the fundamental and higher waveguide modes were observed, which manifests itself for lasers with a 50 µm stripe in an increase of the radiation divergence from ~ 10º near the threshold to > 50º with a two-fold excess of the lasing threshold. The divergence along the slow axis for lasers with a stripe width of 22 µm remained unchanged over the entire range of pump currents and amounted to ~ 50º. The significant contribution of the fundamental mode to the total radiation intensity of quantum cascade lasers, being obvious from the far-field intensity distribution, cannot be established solely from the results of measurements of the near-field.

Diffraction-Limited Infrared-Imaging of the Near-Field Intensity Emitted by Quantum-Cascade Lasers

2012 ◽  
Vol 48 (5) ◽  
pp. 696-702 ◽  
Author(s):  
Michel Kinzer ◽  
Quankui K. Yang ◽  
Stefan Hugger ◽  
Marie Brunner ◽  
Frank Fuchs ◽  
...  
Keyword(s):  
Field Intensity ◽  
Infrared Imaging ◽  
Quantum Cascade Lasers ◽  
Near Field ◽  
Quantum Cascade ◽  
Cascade Lasers

PbTe/PbS Multilayer Mirror for EuTe/PbTe Surface Emitting Quantum Cascade Lasers

2009 ◽  
Vol 129 (11) ◽  
pp. 799-801
Author(s):  
Daoshe Cao ◽  
Taiki Yamano ◽  
Yoku Inoue ◽  
Akihiro Ishida
Keyword(s):  
Quantum Cascade Lasers ◽  
Quantum Cascade ◽  
Multilayer Mirror ◽  
Cascade Lasers

Beam Pattern Investigation of Terahertz Quantum Cascade Lasers

PIERS Online ◽  
2008 ◽  
Vol 4 (2) ◽  
pp. 267-270 ◽  
Author(s):  
Saeed Fathololoumi ◽  
Dayan Ban ◽  
Hui Luo ◽  
Peter Grant ◽  
Sylvain R. Laframboise ◽  
...  
Keyword(s):  
Quantum Cascade Lasers ◽  
Beam Pattern ◽  
Quantum Cascade ◽  
Cascade Lasers
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