Wavelength-Tunable Green Light Sources Based on ZnO:Ga Nanowire/p-InGaN Heterojunctions

Most theories of colour constancy assume a flat coloured surface and a single homogenous light source. Natural situations, however, are 3-dimensional (3-D), are hardly ever restricted to a single light source, and object illumination is never homogenous. Here, two special cases of secondary light sources with sharp boundaries were simulated on a computer screen: a house-like 3-D object with colour patches in sunlight and shadow, and a Mondrian-type pattern with a coloured transparency covering some of the colour patches. Subjects made ‘paper’-matches between colour patches in light and shadow and between patches under the transparency and without the transparency. Matching did not depend on whether the simulated lighting condition was natural (yellow light, blue shadow) or artificial (green light, magenta shadow). Patches under a coloured transparency produced lightness constancy but subjects could not discount chromaticity shifts induced by the transparency. The number of context patches (2 vs 6) made no difference, and it made no difference whether the transparency covered the Mondrian completely or only partially. These results indicate that subjects were not able to use local contrast cues at sharp illumination boundaries to discount for the illuminant.

Download Full-text

Influence of green light illumination at night on biological characteristics of the oriental armyworm, Mythimna separata (Lepidoptera: Noctuidae)

Bulletin of Entomological Research ◽

10.1017/s0007485319000397 ◽

2019 ◽

Vol 110 (1) ◽

pp. 136-143 ◽

Cited By ~ 1

Author(s):

K.-N. Kim ◽

Y.-C. Jo ◽

Z.-J. Huang ◽

Hye-Seng Song ◽

K.-H. Ryu ◽

...

Keyword(s):

Developmental Stages ◽

Dark Period ◽

Control Level ◽

Green Light ◽

Biological Characteristics ◽

Light Illumination ◽

Light Sources ◽

Mythimna Separata ◽

Phototactic Behavior ◽

Oriental Armyworm

AbstractThe oriental armyworm, Mythimna separata is an important crop pest in eastern Asia. Nocturnal insects, including nocturnal moths, have phototactic behavior to an artificial light source. Phototactic behavior in insects is species-specific in response to different wavelengths of light sources. Our previous study showed that green (520 nm) light emitting diode (LED) light resulted in a significantly higher phototactic behavior in M. separata moths compared to the other wavelength LED lights. The goal of the present study is to investigate the influence of green light illumination on biological characteristics of different developmental stages in M. separata. Our results revealed that when different developmental stages of M. separata were exposed to the green light illumination in a dark period, several biological characteristics in all developmental stages except for egg stage were positively changed, but those of F1 generation M. separata which are next generation of the adults exposed to the green light did not significantly change compared with the control level. These findings suggest that green light illumination at night (or dark period) has a positive effect on the development and longevity of M. separata.

Download Full-text

Characterization of Wavelength-Tunable Quantum Dot External Cavity Laser for 1.3-$\mu$m-Waveband Coherent Light Sources

Japanese Journal of Applied Physics ◽

10.1143/jjap.51.02bg08 ◽

2012 ◽

Vol 51 (2) ◽

pp. 02BG08 ◽

Cited By ~ 4

Author(s):

Naokatsu Yamamoto ◽

Kouichi Akahane ◽

Tetsuya Kawanishi ◽

Hideyuki Sotobayashi ◽

Yuki Yoshioka ◽

...

Keyword(s):

Quantum Dot ◽

External Cavity ◽

Light Sources ◽

Coherent Light ◽

External Cavity Laser ◽

Wavelength Tunable ◽

Cavity Laser

Download Full-text

“Three-Bullets” Loaded Mesoporous Silica Nanoparticles for Combined Photo/Chemotherapy

Nanomaterials ◽

10.3390/nano9060823 ◽

2019 ◽

Vol 9 (6) ◽

pp. 823 ◽

Cited By ~ 3

Author(s):

André Luiz Tessaro ◽

Aurore Fraix ◽

Ana Claudia Pedrozo da Silva ◽

Elena Gazzano ◽

Chiara Riganti ◽

...

Keyword(s):

Mesoporous Silica ◽

Silica Nanoparticles ◽

Mesoporous Silica Nanoparticles ◽

Outer Part ◽

Green Light ◽

Biological Evaluation ◽

Light Sources ◽

Good Tolerability ◽

Physiological Conditions ◽

The Individual

This contribution reports the design, preparation, photophysical and photochemical characterization, as well as a preliminary biological evaluation of mesoporous silica nanoparticles (MSNs) covalently integrating a nitric oxide (NO) photodonor (NOPD) and a singlet oxygen (1O2) photosensitizer (PS) and encapsulating the anticancer doxorubicin (DOX) in a noncovalent fashion. These MSNs bind the NOPD mainly in their inner part and the PS in their outer part in order to judiciously exploit the different diffusion radius of the cytotoxic NO and 1O2. Furthermore this silica nanoconstruct has been devised in such a way to permit the selective excitation of the NOPD and the PS with light sources of different energy in the visible window. We demonstrate that the individual photochemical performances of the photoactive components of the MSNs are not mutually affected, and remain unaltered even in the presence of DOX. As a result, the complete nanoconstruct is able to deliver NO and 1O2 under blue and green light, respectively, and to release DOX under physiological conditions. Preliminary biological results performed using A375 cancer cells show a good tolerability of the functionalized MSNs in the dark and a potentiated activity of DOX upon irradiation, due to the effect of the NO photoreleased.

Download Full-text

Nonequilibrium hot-electron-induced wavelength-tunable incandescent-type light sources

Photonics Research ◽

10.1364/prj.8.000091 ◽

2019 ◽

Vol 8 (1) ◽

pp. 91 ◽

Cited By ~ 9

Author(s):

Zhipeng Sun ◽

Mingming Jiang ◽

Wangqi Mao ◽

Caixia Kan ◽

Chongxin Shan ◽

...

Keyword(s):

Light Sources ◽

Hot Electron ◽

Wavelength Tunable

Download Full-text

Safest light in a combat area while performing intravenous access in the dark

Journal of the Royal Army Medical Corps ◽

10.1136/jramc-2017-000898 ◽

2018 ◽

Vol 164 (5) ◽

pp. 343-346 ◽

Cited By ~ 3

Author(s):

Attila Aydin ◽

S Bilge ◽

M Eryilmaz

Keyword(s):

Light Source ◽

Blue Light ◽

Green Light ◽

Night Vision ◽

Infrared Light ◽

Light Sources ◽

Night Time ◽

Naked Eye ◽

Prehospital Management ◽

Dark Room

IntroductionCannulation for the administration of intravenous fluids is integral to the prehospital management of injured military patients. However, this may be technically challenging to undertake during night-time conditions where the use of light to aid cannulation may give the tactical situation away to opponents. The aim of this study was to investigate the success and tactical safety of venepuncture under battlefield conditions with different colour light sources.MethodThe procedure was carried out with naked eye in a bright room in the absence of a separate light source, with a naked eye in a dark room under red, white, blue and green light sources and under an infrared light source while wearing night vision goggles (NVGs). The success, safety, degree of difficulty and completion time for each procedure were then explored.ResultsAll interventions made in daylight and in a dark room were found to be 100% successful. Interventions performed under infrared light while wearing NVGs took longer than under other light sources or in daylight. Interventions performed under blue light were tactically safer when compared with interventions performed under different light sources.ConclusionBlue light offered the best tactical safety during intravenous cannulation under night-time conditions and is recommended for future use in tactical casualty care. The use of NVGs using infrared light cannot be recommended if there is the possibility of opponents having access to the technology.

Download Full-text

Wavelength-Tunable Electroluminescent Light Sources from Individual Ga-Doped ZnO Microwires

Small ◽

10.1002/smll.201604034 ◽

2017 ◽

Vol 13 (19) ◽

pp. 1604034 ◽

Cited By ~ 31

Author(s):

Mingming Jiang ◽

Gaohang He ◽

Hongyu Chen ◽

Zhenzhong Zhang ◽

Lingxia Zheng ◽

...

Keyword(s):

Light Sources ◽

Wavelength Tunable ◽

Doped Zno

Download Full-text

Using InGaN/GaN Multiple Quantum well Green light-Emitting Diodes as a Promising Replacement of Conventional light Sources

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.e7014.109119 ◽

2019 ◽

Vol 9 (1) ◽

pp. 5205-5209

Keyword(s):

Multiple Quantum Well ◽

Three Dimensional ◽

Green Light ◽

Light Sources ◽

Multiple Quantum ◽

Internal Electric Field ◽

Light Emitting ◽

Green Led ◽

P Type ◽

The Impact

In this particular paper we increase a graded indium composition p type InGaN (p InGaN) conduction level to supplant the p type AlGaN electron blocking level & a p GaN level to update the mild yield intensity of a GaN based green light transmitting diode (LED). The indium structure of the p InGaN coating reduced from 10.4 % to zero % across the development heading. A tale configuration is proposed for n-electrode with openings to be connected in Thin-GaN light-transmitting diodes (LEDs). The impact of the n-electrode with gaps on the thermal and electrical qualities of a Thin-GaN LED chip is researched utilizing a three-dimensional numerical simulation The IQE of green LED is restricted by the deformities and the internal electric field in MQW. Thusly, we talk about the ongoing advancement in improving the IQE of green LED in detail. These techniques can be partitioned into two classes. A portion of these techniques were proposed to upgrade precious stone nature of InGaN/GaN MQW with high. In composition and low thickness of deformities by adjusting the development conditions. Different strategies concentrated on expanding electron−hole wave function cover by dispensing with the polarization impact.

Download Full-text

Phototherapy in the Management of Neonatal Hyperbilirubinemia: Efficacy With Light Sources Emitting More Than 500 Nanometers

PEDIATRICS ◽

10.1542/peds.80.3.395 ◽

1987 ◽

Vol 80 (3) ◽

pp. 395-398

Author(s):

Giuseppe Sbrana ◽

Gian Paolo Donzelli ◽

Corrado Vecchi

Keyword(s):

Emission Spectrum ◽

Serum Bilirubin ◽

Green Light ◽

Degradation Process ◽

Light Sources ◽

Experimental Conditions ◽

Fluorescent Lamps ◽

Clinical Action ◽

Blue Component ◽

Green Fluorescent

The clinical action of green fluorescent lamps, properly filtered to remove wavelengths of less than 500 nm, was investigated in a group of 23 newborns with different initial serum bilirubin concentrations. The serum bilirubin levels were measured at 6, 12, 24, and 48 hours after the beginning of phototherapy. These results are compared with those obtained, under the same experimental conditions, in a group exposed to commercial green lamps. Similar bilirubin decline rates were observed in the two experiments. In general, these data confirm the satisfactory clinical efficacy of the green light in phototherapy and prove, in particular, that the blue component present in the emission spectrum of the commercial green lamps has a negligible effect on the bilirubin degradation process.

Download Full-text