Results 31 to 40 of about 46,598 (256)
Superlattice Structure for High Performance AlGaN Deep Ultraviolet LEDs
PhotonicsThis study presents a novel approach to mitigate electron overflow in deep ultraviolet (UV) AlGaN light-emitting diodes (LEDs) by integrating engineered quantum barriers (QBs) with a concave shape and an optimized AlGaN superlattice (SL) electron ...
Mano Bala Sankar Muthu +3 more
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Ammonia Distribution Measurement on a Hot Gas Test Bench Applying Tomographical Optical Methods
Sensors, 2019 Measuring the distribution of gas concentration is a very common problem in a variety of technological fields. Depending on the detectability of the gas, as well as the technological progress of the sector, different methods are used.
Bernhard Fischbacher +2 more
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Status of Growth of Group III-Nitride Heterostructures for Deep Ultraviolet Light-Emitting Diodes
Crystals, 2017 We overview recent progress in growth aspects of group III-nitride heterostructures for deep ultraviolet (DUV) light-emitting diodes (LEDs), with particular emphasis on the growth approaches for attaining high-quality AlN and high Al-molar fraction AlGaN.
Kai Ding +3 more
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DEEP ULTRAVIOLET LIGHT EMITTING DIODES (DUV LEDS) [PDF]
Journal of Engineering Science (Chişinău), 2018 There are a variety of applications for devices that extend into the deep-UV, including biological agent detection and optical storage. The nitride material system is a set of semiconducting compounds that have wavelengths that span a broad ...
Băjenescu, Titu-Marius I.
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Ultrafast molecular photophysics in the deep-ultraviolet [PDF]
The Journal of Chemical Physics, 2019 In the landscape of ultrafast spectroscopic tools, the deep- and near-ultraviolet ranges (200–400 nm) have lagged behind due to the lack of tunability of both the pump and the probe pulses in this range. With the advent of novel nonlinear optical methods, this has now become possible. In this perspective, I will review some of the recent studies in the
openaire +3 more sources
Design of Double-Lattice Photonic Crystal of DUV Laser by ANN-RBF Neural Network
OpticsIn this study, a double-lattice photonic crystal structure was designed to achieve deep ultraviolet lasing without the use of any Distributed Bragg Reflector (DBR), which is called a photonic-crystal surface-emitting laser (PCSEL).
Bochao Zhang +7 more
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An Amorphous (Al0.12Ga0.88)2O3 Deep Ultraviolet Photodetector
IEEE Photonics Journal, 2020 The authors report the deposition of an (AlxGa1-x)2O3 amorphous thin film on sapphire substrates by sputter deposition. An amorphous deep ultraviolet (UV) (Al0.12Ga0.88)2O3 photodetector, with a cutoff wavelength at 230 nm, was also fabricated.
Shu-Bai Liu +3 more
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Shaped ultrafast laser pulses in the deep ultraviolet
Optics Express, 2007 We use an acousto-optic pulse shaper to directly control the phase and amplitude of femtosecond laser pulses in the deep ultraviolet (~ 260 nm). The efficiency of the pulse shaper is 21% and the output pulse energy is 2.8muJ. We are currently using these pulses in molecular coherent control experiments.
Brett J, Pearson, Thomas C, Weinacht
openaire +2 more sources
Discerning protein pools by selective staining with self‐labeling tags
FEBS Letters, EarlyView.Cell surface proteins have an intra‐ and extracellular pool. Combining genetic fusion to self‐labeling tags that can be addressed with small molecule fluorophores allows separating these pools. We highlight recent developments and techniques for state‐of‐the‐art interrogation of cell surface proteins in the complex tissue setting.
Kati Fischermanns, Johannes Broichhagen
wiley +1 more source
IEEE Photonics Journal, 2015 The optical and electrical properties of 270/290/330-nm AlGaN-based deep ultraviolet (UV) light-emitting diodes (LEDs) with different Al content in quantum wells and barriers have been investigated systematically.
G. F. Yang +5 more
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