scholarly journals Long wavelength stacking induced shift of the near-infrared photoluminescence from unintentional MOVPE grown InGaSb/GaSb quantum wells

AIP Advances ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 075004 ◽  
Author(s):  
Chinedu Christian Ahia ◽  
Ngcali Tile ◽  
Amalia Navarro ◽  
Beatriz Galiana Blanco ◽  
Johannes Reinhardt Botha
Keyword(s):  
Quantum Wells ◽  
Near Infrared ◽  
Long Wavelength

Strategy for Achieving Long-Wavelength Near-Infrared Luminescence of Diimineplatinum(II) Complexes

2021 ◽  
Author(s):  
Meng-Meng Su ◽  
Jia-Jia Kang ◽  
Shu-Qin Liu ◽  
Chang-Gong Meng ◽  
Yan-Qin Li ◽  
...  
Keyword(s):  
Near Infrared ◽  
Long Wavelength ◽  
Infrared Luminescence

Long wavelength (1.3 and 1.5 μm) photoluminescence from InGaAs/GaPAsSb quantum wells grown on GaAs

1999 ◽  
Vol 75 (9) ◽  
pp. 1267-1269 ◽  
Author(s):  
P. Dowd ◽  
W. Braun ◽  
David J. Smith ◽  
C. M. Ryu ◽  
C.-Z. Guo ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Long Wavelength

Low-Lattice-Strain Long-Wavelength GaAsSb/GaInAs Type-II Quantum Wells Grown on GaAs Substrates

2002 ◽  
Vol 41 (Part 2, No. 10A) ◽  
pp. L1040-L1042 ◽  
Author(s):  
Makoto Kudo ◽  
Kiyoshi Ouchi ◽  
Jun-ichi Kasai ◽  
Tomoyoshi Mishima
Keyword(s):  
Quantum Wells ◽  
Lattice Strain ◽  
Type Ii ◽  
Long Wavelength ◽  
Gaas Substrates ◽  
Type Ii Quantum Wells

scholarly journals Optimization and functionalization of red-shifted rhodamine dyes

2019 ◽  
Author(s):  
Jonathan B. Grimm ◽  
Ariana N. Tkachuk ◽  
Heejun Choi ◽  
Boaz Mohar ◽  
Natalie Falco ◽  
...  
Keyword(s):  
Chemical Modification ◽  
Near Infrared ◽  
Fluorescent Dyes ◽  
Poor Performance ◽  
Biological Imaging ◽  
Infrared Light ◽  
Long Wavelength ◽  
General Chemical ◽  
Chemical Groups ◽  
Rhodamine Dyes

ABSTRACTExpanding the palette of fluorescent dyes is vital for pushing the frontier of biological imaging. Although rhodamine dyes remain the premier type of small-molecule fluorophore due to their bioavailability and brightness, variants excited with far-red or near-infrared light suffer from poor performance due to their propensity to adopt a lipophilic, nonfluorescent form. We report a general chemical modification for rhodamines that optimizes long-wavelength variants and enables facile functionalization with different chemical groups.

Thermal and multispectral images from Unmanned Aerial Vehicles (UAVs) for water presence detection in temporary streams: first results

2021 ◽  
Author(s):  
Massimo Micieli ◽  
Gianluca Botter ◽  
Giuseppe Mendicino ◽  
Alfonso Senatore
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Near Infrared ◽  
Infrared Band ◽  
Temporary Streams ◽  
Water Index ◽  
Long Wavelength ◽  
Research Activities ◽  
Aerial Vehicles ◽  
Normalized Difference Water Index ◽  
First Results

<p>UAVs (Unmanned Aerial Vehicles) are increasingly used for monitoring river networks with a broad range of purposes. In this contribution, we focus on the use of multispectral sensors, either in the thermal infrared band LWIR (Long-wavelength infrared, 8-15 µm) or in the infrared band NIR (Near-infrared, 0.75-1.4 µm) to map network dynamics in temporary streams. Specifically, we discuss the first results of a set of surveys carried out in 2020 within a small river catchment located in northern Calabria (southern Italy), as part of the research activities of the ERC-funded DyNET project. Preliminary, a rigorous methodology was identified to perform on-site surveys and to process and analyse the acquired images. Experimental results show that the combined use of LWIR and NIR sensors is a suitable solution for detecting water presence in channels characterized by different hydraulic and morphologic conditions. LWIR sensors alone allow one to discriminate water presence only when the thermal contrast with the surrounding environment is high. On the other hand, NIR sensors permit to detect the presence of water in most of the analyzed settings through the estimate of the Normalized Difference Water Index (NDWI). However, NIR sensors can be misled in case of shallow water depth, due to the NIR radiation emitted by the riverbed merging with that of the water. Overall, the study demonstrates that a combined LWIR/NIR approach allows addressing a broader range of conditions. Moreover, the information provided can be further enhanced by combining it with geomorphologic information and basic hydraulic concepts.</p>

scholarly journals Core remodeling leads to long wavelength fluoro-coumarins

2020 ◽  
Vol 11 (28) ◽  
pp. 7302-7307 ◽  
Author(s):  
Siddharth S. Matikonda ◽  
Joseph Ivanic ◽  
Miguel Gomez ◽  
Gabrielle Hammersley ◽  
Martin J. Schnermann
Keyword(s):  
Molecular Weight ◽  
Near Infrared ◽  
Low Molecular Weight ◽  
Long Wavelength

Fluoro-Coumarins are a novel class of far-red and near-infrared solvent sensitive dyes of exceptionally low molecular weight.

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