Low- and High-Order Nonlinear Optical Characterization of Metal Sulfide Quantum Dots

Any new synthesized semiconductor nanoparticles or quantum dots (QDs) require to be examined under different conditions using laser pulses of variable energies, wavelengths and durations to understand the nonlinear optical mechanisms and distinguish their attractive properties for practical applications. Among various QDs the metal sulfides took special attention due to their advanced nonlinear optical properties. Additionally, laser ablation can readily produce plasmas containing QDs that could be used for different applications. One of them is that they can be used as emitters for harmonic generation from ultrashort laser pulses. Here we review recent studies of different low- and high-order optical nonlinearities of metal sulfide QDs, such as optical limiting, two-photon, saturable and reverse saturable types of nonlinear absorption, nonlinear refraction, and generation of high-order harmonics in extreme ultraviolet range.

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Low- and high-order nonlinear optical characterization of C60-containing media

The European Physical Journal D ◽

10.1140/epjd/e2011-20030-7 ◽

2011 ◽

Vol 64 (1) ◽

pp. 109-114 ◽

Cited By ~ 16

Author(s):

R. A. Ganeev ◽

G. S. Boltaev ◽

R. I. Tugushev ◽

T. Usmanov ◽

M. Baba ◽

...

Keyword(s):

Nonlinear Optical ◽

Optical Characterization ◽

High Order

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Synthesis and nonlinear optical characterization of SnO2 quantum dots

Optik ◽

10.1016/j.ijleo.2011.11.005 ◽

2012 ◽

Vol 123 (22) ◽

pp. 2090-2094 ◽

Cited By ~ 12

Author(s):

M.H. Majles Ara ◽

P. Boroojerdian ◽

Z. Javadi ◽

S. Zahedi ◽

M. Morshedian

Keyword(s):

Quantum Dots ◽

Nonlinear Optical ◽

Optical Characterization

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Nonlinear optical characterization of new thermoset hydrosilation polymers

Applied Physics Letters ◽

10.1063/1.111499 ◽

1994 ◽

Vol 64 (20) ◽

pp. 2628-2630 ◽

Cited By ~ 1

Author(s):

W. M. Gibbons ◽

R. P. Grasso ◽

M. K. O’Brien ◽

P. J. Shannon ◽

S. T. Sun

Keyword(s):

Nonlinear Optical ◽

Optical Characterization

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Picosecond nonlinear optical characterization of GaAs at lamda=1.064 μm

10.1117/12.20705 ◽

1990 ◽

Author(s):

Antoniangelo Agnesi ◽

Gian P. Banfi ◽

Mauro M. Costa ◽

Martina Ghigliazza ◽

Giancarlo C. Reali

Keyword(s):

Nonlinear Optical ◽

Optical Characterization

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L-cysteine functionalized graphene quantum dots for sub-ppb detection of As (III)

Nanotechnology ◽

10.1088/1361-6528/ac353b ◽

2021 ◽

Author(s):

Md. Farhan Naseh ◽

Neelam Singh ◽

Jamilur R. Ansari ◽

Ashavani Kumar ◽

Tapan Sarkar ◽

...

Keyword(s):

Electron Microscopy ◽

Quantum Dots ◽

Room Temperature ◽

Graphene Quantum Dots ◽

Optical Characterization ◽

Functionalized Graphene ◽

Transmission Electron ◽

Sensitivity And Selectivity ◽

Structural Characterizations

Abstract Here, we report functionalized graphene quantum dots (GQDs) for the optical detection of arsenic at room temperature. GQDs with the fluorescence of three fundamental colors (red, green, and blue) were synthesized and functionally capped with L-cysteine (L-cys) to impart selectively towards As (III) by exploiting the affinity of L-cys towards arsenite. The optical characterization of GQDs was carried out using UV-Vis absorption spectroscopy, Fourier transform infrared spectroscopy, and fluorescence spectrometry and the structural characterizations were performed using transmission electron microscopy. The fluorescence results showed instantaneous quenching in intensity when the GQDs came in contact with As (III) for all test concentrations over a range from 0.025 ppb to 25 ppb, which covers the permissible limit of arsenic in drinking water. The experimental results suggested excellent sensitivity and selectivity towards As (III).

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