Investigations on the Use of Laser Dyes as Quantum Counters for Obtaining Corrected Fluorescence Spectra in the Near Infrared

2009 ◽  
pp. 112-112-15 ◽  
Author(s):  
JX Duggan ◽  
J DiCesare ◽  
JF Williams
Keyword(s):  
Fluorescence Spectra ◽  
Near Infrared ◽  
Laser Dyes

scholarly journals Realizing Near‐Infrared Laser Dyes through a Shift in Excited‐State Absorption

2021 ◽  
pp. 2001947
Author(s):  
Reiko Aoki ◽  
Ryutaro Komatsu ◽  
Kenichi Goushi ◽  
Masashi Mamada ◽  
Soo Young Ko ◽  
...  
Keyword(s):  
Excited State ◽  
Near Infrared ◽  
Excited State Absorption ◽  
Infrared Laser ◽  
Laser Dyes

A phthalocyanine-based fluorescent sensor for Zn2+ ion

2013 ◽  
Vol 17 (01n02) ◽  
pp. 99-103 ◽  
Author(s):  
Hui He ◽  
Jian-Yong Liu ◽  
Dennis K.P. Ng
Keyword(s):  
Metal Ions ◽  
Spectral Properties ◽  
Fluorescence Spectra ◽  
Near Infrared ◽  
Fluorescent Sensor ◽  
High Sensitivity ◽  
Absorption And Fluorescence Spectra

This paper describes the preparation and spectral properties of a near-infrared fluorophore in which two bis(2-picolyl)amino moieties are axially linked to a silicon(IV) phthalocyanine core. The effects of various metal ions on its absorption and fluorescence spectra have been examined. The results indicate that this compound shows a high sensitivity and moderate selectivity toward Zn2+ ion.

scholarly journals The Effect of Acceptor Structure on Emission Color Tuning in Organic Semiconductors with D–π–A–π–D Structures

Nanomaterials ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 1179 ◽  
Author(s):  
Przemyslaw Ledwon ◽  
Gabriela Wiosna-Salyga ◽  
Marian Chapran ◽  
Radoslaw Motyka
Keyword(s):  
Organic Semiconductors ◽  
Fluorescence Spectra ◽  
Near Infrared ◽  
Energy Levels ◽  
Light Emitting ◽  
Emission Color ◽  
Donor Acceptor ◽  
Homo And Lumo ◽  
Emission Quenching ◽  
Homo And Lumo Energy

A series of novel donor–acceptor D–π–A–π–D compounds were synthesized and characterized in order to determine the influence of different acceptor units on their properties. The introduction of acceptor moieties had a direct impact on the HOMO and LUMO energy levels. Fluorescence spectra of compounds can be changed by the choice of an appropriate acceptor and were shifted from the green to the near-infrared part of spectra. Due to observed concentration induced emission quenching, the green exciplex type host was used to evaluate the potential of synthesized molecules as emitters in organic light emitting diodes (OLEDs).

Fluorescence Quenching Studies of Near-Infrared Fluorophores

1989 ◽  
Vol 43 (8) ◽  
pp. 1450-1455 ◽  
Author(s):  
Daniel Andrews-Wilberforce ◽  
Gabor Patonay
Keyword(s):  
Fluorescence Quenching ◽  
Systematic Study ◽  
Near Infrared ◽  
Infrared Laser ◽  
Laser Dyes

Near-infrared laser dyes were studied with the use of conventional fluorescence quenching. A systematic study of the effects of different quenchers and temperature on the fluorescence of near-infrared fluorophores is presented. Differences in the quenching of near-infrared fluorophores were observed for quenching by ionic quenchers. Quenching with ionic and nonionic quenchers led to nonlinear quenching results.

Crystal growth, structure and characterization of Er6B4O15as self-activated eye-safe laser material within the near-infrared waveband

2018 ◽  
Vol 74 (2) ◽  
pp. 132-136
Author(s):  
Yan Wang ◽  
Wei Zhang ◽  
Ziyi Li ◽  
Jianfu Li ◽  
Zhaojie Zhu ◽  
...  
Keyword(s):  
Cross Section ◽  
Fluorescence Spectra ◽  
Near Infrared ◽  
Emission Cross Section ◽  
Fluorescence Decay ◽  
X Ray Diffraction ◽  
Infrared Wavelength ◽  
Rare Earth Borate ◽  
Laser Diode Pumping

A new rare-earth borate Er6B4O15was synthesized by a solid-state reaction technique. The crystal was obtained by a flux method. Single-crystal X-ray diffraction analysis revealed that the crystal structure is composed of ErO6polyhedra sharing edges and BO3groups. The absorption, near-infrared fluorescence spectra and the fluorescence decay curve of Er:4I13/2energy level in the Er6B4O15crystal were measured at room temperature. The absorption peak was located at 977 nm with absorption cross section of 1.16 × 10−21 cm2and a full width at half-maximum (FWHM) of 16 nm, which is very suitable for commercial 980 nm laser diode pumping. A maximum emission peak at 1560 mm with a broad FWHM of 64 nm was observed in this crystal because of the Er3+transition4I13/2→4I15/2, while the emission cross section was calculated to be 8.53 × 10−20 cm2. These results imply that the Er6B4O15crystal is a promising candidate material for the achievement of an eye-safe near-infrared wavelength laser.

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