scholarly journals Coherent X-Ray Generation by Use of Mid-Infrared Light Pulses

2009 ◽  
Vol 37 (4) ◽  
pp. 271-277
Author(s):  
Nobuhisa ISHII ◽  
Takao FUJI ◽  
Andrius BALTUSKA ◽  
Ferenc KRAUSZ
Keyword(s):  
Infrared Light ◽  
Mid Infrared ◽  
X Ray ◽  
Light Pulses

scholarly journals Mode-locked short pulses from an 8 μm wavelength semiconductor laser

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Johannes Hillbrand ◽  
Nikola Opačak ◽  
Marco Piccardo ◽  
Harald Schneider ◽  
Gottfried Strasser ◽  
...  
Keyword(s):  
Carrier Transport ◽  
Quantum Cascade Lasers ◽  
Gain Medium ◽  
Infrared Light ◽  
Molecular Fingerprint ◽  
Short Pulses ◽  
Mid Infrared ◽  
Frequency Combs ◽  
Monolithically Integrated ◽  
Light Pulses

AbstractQuantum cascade lasers (QCL) have revolutionized the generation of mid-infrared light. Yet, the ultrafast carrier transport in mid-infrared QCLs has so far constituted a seemingly insurmountable obstacle for the formation of ultrashort light pulses. Here, we demonstrate that careful quantum design of the gain medium and control over the intermode beat synchronization enable transform-limited picosecond pulses from QCL frequency combs. Both an interferometric radio-frequency technique and second-order autocorrelation shed light on the pulse dynamics and confirm that mode-locked operation is achieved from threshold to rollover current. Furthermore, we show that both anti-phase and in-phase synchronized states exist in QCLs. Being electrically pumped and compact, mode-locked QCLs pave the way towards monolithically integrated non-linear photonics in the molecular fingerprint region beyond 6 μm wavelength.

scholarly journals Coherence tomography with broad bandwidth extreme ultraviolet and soft X-ray radiation

2021 ◽  
Vol 127 (4) ◽  
Author(s):  
S. Skruszewicz ◽  
S. Fuchs ◽  
J. J. Abel ◽  
J. Nathanael ◽  
J. Reinhard ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Near Infrared ◽  
Extreme Ultraviolet ◽  
Infrared Light ◽  
Imaging Method ◽  
Optical Coherence ◽  
Axial Resolution ◽  
Cross Sectional ◽  
X Ray ◽  
Broad Bandwidth

AbstractWe present an overview of recent results on optical coherence tomography with the use of extreme ultraviolet and soft X-ray radiation (XCT). XCT is a cross-sectional imaging method that has emerged as a derivative of optical coherence tomography (OCT). In contrast to OCT, which typically uses near-infrared light, XCT utilizes broad bandwidth extreme ultraviolet (XUV) and soft X-ray (SXR) radiation (Fuchs et al in Sci Rep 6:20658, 2016). As in OCT, XCT’s axial resolution only scales with the coherence length of the light source. Thus, an axial resolution down to the nanometer range can be achieved. This is an improvement of up to three orders of magnitude in comparison to OCT. XCT measures the reflected spectrum in a common-path interferometric setup to retrieve the axial structure of nanometer-sized samples. The technique has been demonstrated with broad bandwidth XUV/SXR radiation from synchrotron facilities and recently with compact laboratory-based laser-driven sources. Axial resolutions down to 2.2 nm have been achieved experimentally. XCT has potential applications in three-dimensional imaging of silicon-based semiconductors, lithography masks, and layered structures like XUV mirrors and solar cells.

scholarly journals Study of the Effect of TiO2 Layer on the Adsorption and Photocatalytic Activity of TiO2-MoS2 Heterostructures under Visible-Infrared Light

2020 ◽  
Vol 2020 ◽  
pp. 1-9 ◽  
Author(s):  
N. Cruz-González ◽  
O. Calzadilla ◽  
J. Roque ◽  
F. Chalé-Lara ◽  
J. K. Olarte ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Photoelectron Spectroscopy ◽  
Diffuse Reflectance Spectroscopy ◽  
Nitrogen Adsorption ◽  
High Photocatalytic Activity ◽  
Infrared Light ◽  
Polluted Water ◽  
Light Spectrum ◽  
X Ray

In the last decade, the urgent need to environmental protection has promoted the development of new materials with potential applications to remediate air and polluted water. In this work, the effect of the TiO2 thin layer over MoS2 material in photocatalytic activity is reported. We prepared different heterostructures, using a combination of electrospinning, solvothermal, and spin-coating techniques. The properties of the samples were analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), X-ray diffraction (XRD), nitrogen adsorption-desorption isotherms, UV-Vis diffuse reflectance spectroscopy (UV-Vis-DRS), and X-ray photoelectron spectroscopy (XPS). The adsorption and photocatalytic activity were evaluated by discoloration of rhodamine B solution. The TiO2-MoS2/TiO2 heterostructure presented three optical absorption edges at 1.3 eV, 2.28 eV, and 3.23 eV. The high adsorption capacity of MoS2 was eliminated with the addition of TiO2 thin film. The samples show high photocatalytic activity in the visible-IR light spectrum.

New Mid-Infrared Light Sources

2012 ◽  
Vol 18 (1) ◽  
pp. 531-540 ◽  
Author(s):  
Jens Biegert ◽  
Philip K. Bates ◽  
Olivier Chalus
Keyword(s):  
Infrared Light ◽  
Light Sources ◽  
Mid Infrared

scholarly journals Grating-type mid-infrared light absorber based on silicon carbide material

2016 ◽  
Vol 24 (20) ◽  
pp. 22596 ◽  
Author(s):  
Wenrui Xue ◽  
Xi Chen ◽  
Yanling Peng ◽  
Rongcao Yang
Keyword(s):  
Silicon Carbide ◽  
Infrared Light ◽  
Mid Infrared ◽  
Light Absorber

Detailed X-ray diffraction studies on optically pumped mid-infrared InAs/Ga(In)Sb/AlSb type-II lasers

2003 ◽  
Vol 257 (1-2) ◽  
pp. 42-50 ◽  
Author(s):  
G. Hoffmann ◽  
H.J. Schimper ◽  
C. Schwender ◽  
N. Herhammer ◽  
G.F. West ◽  
...  
Keyword(s):  
Type Ii ◽  
X Ray Diffraction ◽  
Optically Pumped ◽  
Mid Infrared ◽  
X Ray

X-ray lasers pumped by ultra-short light pulses

2001 ◽  
Vol 11 (PR2) ◽  
pp. Pr2-181-Pr2-187 ◽  
Author(s):  
G. J. Pert
Keyword(s):  
X Ray ◽  
Light Pulses

Room temperature thermo-electric pumping in mid-infrared light-emitting diodes

2013 ◽  
Vol 103 (18) ◽  
pp. 183513 ◽  
Author(s):  
Parthiban Santhanam ◽  
Duanni Huang ◽  
Rajeev J. Ram ◽  
Maxim A. Remennyi ◽  
Boris A. Matveev
Keyword(s):  
Room Temperature ◽  
Light Emitting Diodes ◽  
Infrared Light ◽  
Thermo Electric ◽  
Mid Infrared ◽  
Light Emitting
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