Extending the wavelength range of single-emitter diode lasers for medical and sensing applications: 12xx-nm quantum dots, 2000-nm wells, > 5000-nm cascade lasers

2007 ◽  
Author(s):  
Paul Crump ◽  
Steve Patterson ◽  
Sandrio Elim ◽  
Shiguo Zhang ◽  
Mike Bougher ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Wavelength Range ◽  
Diode Lasers ◽  
Sensing Applications ◽  
Single Emitter ◽  
Cascade Lasers

Heterostructures for quantum-cascade lasers of the wavelength range of 7–8 μm

2017 ◽  
Vol 43 (7) ◽  
pp. 666-669 ◽  
Author(s):  
A. V. Babichev ◽  
A. G. Gladyshev ◽  
A. V. Filimonov ◽  
V. N. Nevedomskii ◽  
A. S. Kurochkin ◽  
...  
Keyword(s):  
Wavelength Range ◽  
Quantum Cascade Lasers ◽  
Quantum Cascade ◽  
Cascade Lasers

Nanocrystalline Phosphors for Lighting and Detection Applications

2010 ◽  
Vol 654-656 ◽  
pp. 1130-1133 ◽  
Author(s):  
Christopher J. Summers ◽  
Hisham M. Menkara ◽  
Richard A. Gilstrap ◽  
Mazen Menkara ◽  
Thomas Morris
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Shell Growth ◽  
Stokes Shift ◽  
Thermal Quenching ◽  
High Sensitivity ◽  
In Situ Monitoring ◽  
White Leds ◽  
Sensing Applications ◽  
Improved Stability

We report the development of new nanoparticle phosphors and quantum dot structures designed for applications to enhance the color rendering and efficiency of high brightness white LEDs, as well as for bio-sensing applications. The intrinsic problem of self-absorption, high toxicity, and high sensitivity to thermal quenching of conventional quantum dot systems has prevented their adoption to LED devices. Doped Cd-free quantum dots may circumvent these issues due to their distinct Stokes shift and improved stability at high temperature. We report on the modification of Mn-doped ZnSe/ZnS core-shell quantum dots for application to the (blue diode + yellow emitter) white LED system. Band gap tuning for 460 nm excitation, inorganic shell growth and in-situ monitoring for enhanced efficiency, and analysis of thermal stability will are reported.

Shell thickness effects on quantum dot brightness and energy transfer

Nanoscale ◽  
2017 ◽  
Vol 9 (42) ◽  
pp. 16446-16458 ◽  
Author(s):  
Margaret Chern ◽  
Thuy T. Nguyen ◽  
Andrew H. Mahler ◽  
Allison M. Dennis
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Quantum Dot ◽  
Shell Thickness ◽  
Sensing Applications

CdSe/xCdS/ZnS thick-shelled ‘giant’ quantum dots are exceptionally bright as well as effective as energy transfer donors for sensing applications.

Output Far Field Characteristics of High Power Fiber Coupling Diode Lasers Based on Single Emitter Devices

2017 ◽  
Vol 38 (2) ◽  
pp. 170-176
Author(s):  
夏晓宇 XIA Xiao-yu ◽  
高 欣 GAO Xin ◽  
许留洋 XU Liu-yang ◽  
曹曦文 CAO Xi-wen ◽  
乔忠良 QIAO Zhong-liang ◽  
...  
Keyword(s):  
High Power ◽  
Diode Lasers ◽  
Far Field ◽  
Fiber Coupling ◽  
Single Emitter

scholarly journals Role of shell composition and morphology in achieving single-emitter photostability for green-emitting “giant” quantum dots

2020 ◽  
Vol 152 (12) ◽  
pp. 124713 ◽  
Author(s):  
James R. McBride ◽  
Nimai Mishra ◽  
Sophia M. Click ◽  
Noah J. Orfield ◽  
Feng Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Shell Composition ◽  
Single Emitter

scholarly journals Electrochemical detection of white spot syndrome virus with a silicone rubber disposable electrode composed of graphene quantum dots and gold nanoparticle-embedded polyaniline nanowires

2020 ◽  
Vol 18 (1) ◽  
Author(s):  
Kenshin Takemura ◽  
Jun Satoh ◽  
Jirayu Boonyakida ◽  
Sungjo Park ◽  
Ankan Dutta Chowdhury ◽  
...  
Keyword(s):  
Quantum Dots ◽  
White Spot Syndrome Virus ◽  
Graphene Quantum Dots ◽  
High Sensitivity ◽  
White Spot ◽  
Sensing Matrix ◽  
Disposable Electrode ◽  
Sensing Applications ◽  
Doped Graphene ◽  
White Spot Syndrome

Abstract Background With the enormous increment of globalization and global warming, it is expected that the number of newly evolved infectious diseases will continue to increase. To prevent damage due to these infections, the development of a diagnostic method for detecting a virus with high sensitivity in a short time is highly desired. In this study, we have developed a disposable electrode with high-sensitivity and accuracy to evaluate its performances for several target viruses. Results Conductive silicon rubber (CSR) was used to fabricate a disposable sensing matrix composed of nitrogen and sulfur-co-doped graphene quantum dots (N,S-GQDs) and a gold-polyaniline nanocomposite (AuNP-PAni). A specific anti-white spot syndrome virus (WSSV) antibody was conjugated to the surface of this nanocomposite, which was successfully applied for the detection of WSSV over a wide linear range of concentration from 1.45 × 102 to 1.45 × 105 DNA copies/ml, with a detection limit as low as 48.4 DNA copies/ml. Conclusion The engineered sensor electrode can retain the detection activity up to 5 weeks, to confirm its long-term stability, required for disposable sensing applications. This is the first demonstration of the detection of WSSV by a nanofabricated sensing electrode with high sensitivity, selectivity, and stability, providing as a potential diagnostic tool to monitor WSSV in the aquaculture industry.

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