Room‐Temperature High‐Gain Long‐Wavelength Photodetector via Optical–Electrical Controlling of Hot Carriers in Graphene

2018 ◽  
Vol 6 (24) ◽  
pp. 1800836 ◽  
Author(s):  
Changlong Liu ◽  
Lin Wang ◽  
Xiaoshuang Chen ◽  
Antonio Politano ◽  
Dacheng Wei ◽  
...  
Keyword(s):  
Room Temperature ◽  
High Gain ◽  
Hot Carriers ◽  
Long Wavelength

High-power long-wavelength room-temperature MOVPE-grown quantum cascade lasers with air-semiconductor waveguide

2008 ◽  
Vol 44 (8) ◽  
pp. 525 ◽  
Author(s):  
Q.J. Wang ◽  
C. Pflügl ◽  
L. Diehl ◽  
F. Capasso ◽  
S. Furuta ◽  
...  
Keyword(s):  
High Power ◽  
Room Temperature ◽  
Quantum Cascade Lasers ◽  
Long Wavelength ◽  
Quantum Cascade ◽  
Cascade Lasers

Long-wavelength electroluminescence of InGaAs-capped type-II GaSb/GaAs quantum-rings at room temperature

2013 ◽  
Vol 378 ◽  
pp. 571-575 ◽  
Author(s):  
Wei-Hsun Lin ◽  
Kai-Wei Wang ◽  
Shih-Yen Lin ◽  
Meng-Chyi Wu
Keyword(s):  
Room Temperature ◽  
Type Ii ◽  
Quantum Rings ◽  
Long Wavelength

Color tunable room temperature phosphorescent carbon dot based nanocomposites obtainable from multiple carbon sources via a molten salt method

Nanoscale ◽  
2019 ◽  
Vol 11 (24) ◽  
pp. 11967-11974 ◽  
Author(s):  
Chan Wang ◽  
Yueyue Chen ◽  
Tantan Hu ◽  
Yong Chang ◽  
Guoxia Ran ◽  
...  
Keyword(s):  
Charge Density ◽  
Molten Salt ◽  
Room Temperature ◽  
Carbon Sources ◽  
Molten Salt Method ◽  
Carbon Dot ◽  
Long Wavelength ◽  
Color Tunable ◽  
Long Lifetime

The structural confinement and charge density engineering of molten salt endorsed CD-based room temperature phosphorescent (RTP) nanocomposites with long-lifetime, long-wavelength and excitation-dependent RTP.

Broad-band high-gain room temperature photodetectors using semiconductor–metal nanofloret hybrids with wide plasmonic response

Nanoscale ◽  
2019 ◽  
Vol 11 (13) ◽  
pp. 6368-6376 ◽  
Author(s):  
Amir Ziv ◽  
Avra Tzaguy ◽  
Zhiyuan Sun ◽  
Shira Yochelis ◽  
Emmanuel Stratakis ◽  
...  
Keyword(s):  
Room Temperature ◽  
Broad Band ◽  
Optoelectronic Device ◽  
High Gain ◽  
Spectral Detection

We present an optoelectronic device for broad spectral detection using SiGe nanowires coupled to a plasmonic antenna.

scholarly journals Visible-Light-Excited Room Temperature Phosphorescent Carbon Dots

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 464 ◽  
Author(s):  
Sizhe Hu ◽  
Kai Jiang ◽  
Yuci Wang ◽  
Sui Wang ◽  
Zhongjun Li ◽  
...  
Keyword(s):  
Solid State ◽  
Visible Light ◽  
Carbon Dots ◽  
Short Wavelength ◽  
Room Temperature ◽  
Uv Light ◽  
Long Wavelength ◽  
Heating Treatment ◽  
First Time ◽  
Matrix Free

Carbon dots (CDs) with a room temperature phosphorescent (RTP) feature have attracted considerable interest in recent years due to their fundamental importance and promising applications. However, the reported matrix-free RTP CDs only show short-wavelength (green to yellow) emissions and have to be triggered by ultraviolet (UV) light (below 400 nm), limiting their applications in certain fields. Herein, visible-light-excited matrix-free RTP CDs (named AA-CDs) with a long-wavelength (orange) emission are reported for the first time. The AA-CDs can be facilely prepared via a microwave heating treatment of L-aspartic acid (AA) in the presence of ammonia and they emit unique orange RTP in the solid state with visible light (420 nm) excitation just being switched off. Through the studies of the carbonization process, the C=O and C=N containing moieties in the AA-CDs are confirmed to be responsible for the observed RTP emission. Finally, the applications of AA-CDs in information encryption and anti-counterfeiting were preliminarily demonstrated.

Room-temperature, CW operation of lattice-matched long-wavelength VCSELs

2000 ◽  
Vol 36 (17) ◽  
pp. 1465 ◽  
Author(s):  
E. Hall ◽  
S. Nakagawa ◽  
G. Almuneau ◽  
J.K. Kim ◽  
L.A. Coldren
Keyword(s):  
Room Temperature ◽  
Long Wavelength ◽  
Cw Operation ◽  
Lattice Matched

scholarly journals Anisotropic ultrasensitive PdTe2-based phototransistor for room-temperature long-wavelength detection

2020 ◽  
Vol 6 (36) ◽  
pp. eabb6500
Author(s):  
Cheng Guo ◽  
Yibin Hu ◽  
Gang Chen ◽  
Dacheng Wei ◽  
Libo Zhang ◽  
...  
Keyword(s):  
Room Temperature ◽  
High Mobility ◽  
Charge Carriers ◽  
Terahertz Frequency ◽  
Large Area ◽  
Long Wavelength ◽  
Terahertz Band ◽  
High Anisotropy ◽  
Topological Semimetals ◽  
Wavelength Detection

Emergent topological Dirac semimetals afford fresh pathways for optoelectronics, although device implementation has been elusive to date. Specifically, palladium ditelluride (PdTe2) combines the capabilities provided by its peculiar band structure, with topologically protected electronic states, with advantages related to the occurrence of high-mobility charge carriers and ambient stability. Here, we demonstrate large photogalvanic effects with high anisotropy at terahertz frequency in PdTe2-based devices. A responsivity of 10 A/W and a noise-equivalent power lower than 2 pW/Hz0.5 are achieved at room temperature, validating the suitability of PdTe2-based devices for applications in photosensing, polarization-sensitive detection, and large-area fast imaging. Our findings open opportunities for exploring uncooled and sensitive photoelectronic devices based on topological semimetals, especially in the highly pursuit terahertz band.

High Temperature, High Pressure Absorption Spectra of Uranyl Chloride Solutions Under Shock Conditions

1983 ◽  
Vol 22 ◽  
Author(s):  
Arnold H. Ewald
Keyword(s):  
Shock Wave ◽  
Absorption Spectra ◽  
Room Temperature ◽  
Nitrate Solution ◽  
Appreciable Effect ◽  
Long Wavelength ◽  
Uranyl Perchlorate ◽  
Wavelength Absorption ◽  
High Temperature High Pressure ◽  
Absorption Measurements

In 1960 David and Ewald [1] developed a technique for photographing the absorption spectra of solutions under shock wave conditions. A photograph of the spectrum of a uranyl nitrate solution exposed to a shock wave of 75 kbar showed the absorption to extend beyond 500 nm, the long wavelength limit for uranyl solutions under ordinary conditions. A.H. Ewald (unpublished, 1963) found that at room temperature pressure up to 6 kbar had no appreciable effect on absorption. Bell and Biggers [2,3] published an analysis of the spectrum of uranyl perchlorate solutions. The longest wavelength absorption band was at 486 nm but Bell [4] later found bands at 508 and 531 nm. The intensity of these very weak bands increased when the solution was heated to 95° C, and they were interpreted as “hot bands” due to absorption from an excited ground state. This paper reports new absorption measurements made on uranyl solutions heated to 250°C at low pressure and offers an interpretation of the effect observed in the shock experiments.

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