scholarly journals Role of interband and photoinduced absorption in the nonlinear refraction and absorption of resonantly excited PbS quantum dots around 1550 nm

2012 ◽  
Vol 85 (11) ◽  
Author(s):  
Abdoulghafar Omari ◽  
Iwan Moreels ◽  
Francesco Masia ◽  
Wolfgang Langbein ◽  
Paola Borri ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Nonlinear Refraction ◽  
Photoinduced Absorption ◽  
Pbs Quantum Dots

Role of Nd3+ ions on the nucleation and growth of PbS quantum dots (QDs) in silicate glasses

2017 ◽  
Vol 100 (7) ◽  
pp. 2879-2884 ◽  
Author(s):  
Won Ji Park ◽  
Min Gyu Kim ◽  
Ju Eun Kim ◽  
Jing Wang ◽  
Ho Jeong Lee ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Nucleation And Growth ◽  
Silicate Glasses ◽  
Pbs Quantum Dots

Steady state photoinduced absorption of PbS quantum dots film

2008 ◽  
Vol 92 (14) ◽  
pp. 141108 ◽  
Author(s):  
Jian Zhang ◽  
Xiaomei Jiang
Keyword(s):  
Quantum Dots ◽  
Steady State ◽  
Photoinduced Absorption ◽  
Pbs Quantum Dots

scholarly journals Nonlinear Optical Characterization of InP@ZnS Core-Shell Colloidal Quantum Dots Using 532 nm, 10 ns Pulses

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1366
Author(s):  
Rashid A. Ganeev ◽  
Andrey I. Zvyagin ◽  
Ivan A. Shuklov ◽  
Maksim G. Spirin ◽  
Oleg V. Ovchinnikov ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Nonlinear Refraction ◽  
Colloidal Quantum Dots ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Core Shell ◽  
Nonlinear Scattering ◽  
532 Nm

InP@ZnS core-shell colloidal quantum dots (CQDs) were synthesized and characterized using the z-scan technique. The nonlinear refraction and nonlinear absorption coefficients (γ = −2 × 10−12 cm2 W−1, β = 4 × 10−8 cm W−1) of these CQDs were determined using 10 ns, 532 nm pulses. The saturable absorption (β = −1.4 × 10−9 cm W−1, Isat = 3.7 × 108 W cm−2) in the 3.5 nm CQDs dominated at small intensities of the probe pulses (I ≤ 7 × 107 W cm−2) followed by reverse saturable absorption at higher laser intensities. We report the optical limiting studies using these CQDs showing the suppression of propagated nanosecond radiation in the intensity range of 8 × 107–2 × 109 W cm−2. The role of nonlinear scattering is considered using off-axis z-scan scheme, which demonstrated the insignificant role of this process along the whole range of used intensities of 532 nm pulses. We discuss the thermal nature of the negative nonlinear refraction in the studied species.

Porous Semiconductor Films For Photo-Electrical Applications

1996 ◽  
Vol 426 ◽  
Author(s):  
R. Könenkamp ◽  
P. Hoyer
Keyword(s):  
Quantum Dots ◽  
Semiconductor Devices ◽  
Experimental Results ◽  
Semiconductor Films ◽  
Trap States ◽  
Porous Films ◽  
Nano Crystalline ◽  
Pbs Quantum Dots

AbstractWe report on the preparation and characterization of semiconductor devices based on porous nano-crystalline TiO2 films. We present experimental results on photoconduction to elucidate the role of trap states in this material. We then analyse the behavior of a SnO2/TiO2/Pt Schottkydiode and finally present spectral photoresponse data obtained on a hetero-junction between TiO2 films and PbS quantum dots. We find that the porous films hold some promise for electronic applications, in which fast reponse times are not required.

scholarly journals Size Dependence of the Resonant Third-Order Nonlinear Refraction of Colloidal PbS Quantum Dots

Photonics ◽  
2020 ◽  
Vol 7 (2) ◽  
pp. 39
Author(s):  
Ivan D. Skurlov ◽  
Evgeniia A. Ponomareva ◽  
Azat O. Ismagilov ◽  
Sergey E. Putilin ◽  
Ilia A. Vovk ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Lead Sulfide ◽  
Figure Of Merit ◽  
Nonlinear Response ◽  
Size Dependence ◽  
Nonlinear Refraction ◽  
Colloidal Solutions ◽  
Third Order ◽  
Lead Sulfide Quantum Dots ◽  
Pbs Quantum Dots

Due to their high resonant third-order nonlinear response, lead sulfide quantum dots (QDs) are potential materials for applications in the field of nonlinear optics. In this paper, we implement the Z-scan method to study the resonant nonlinear response of lead sulfide QDs in colloidal solutions. We managed to measure the purely intrinsic resonant nonlinear response, free of thermal contribution. We report that the lead sulfide QD third-order nonlinear response per QD shows an unconventional increase. A figure of merit for QD nonlinearity grows as a power function with a factor of 2.9.

Synergistic Effect Between Halide Perovskites and PbS Quantum Dots

2020 ◽  
Author(s):  
Iván Mora-Seró ◽  
Sofia Masi ◽  
David Macias-Pinilla ◽  
Carlos Echeverría-Arrondo ◽  
Juan Ignacio Climente
Keyword(s):  
Quantum Dots ◽  
Synergistic Effect ◽  
Halide Perovskites ◽  
Pbs Quantum Dots

The role of elevated autophagy on the synaptic plasticity impairment caused by CdSe/ZnS quantum dots

Biomaterials ◽  
2013 ◽  
Vol 34 (38) ◽  
pp. 10172-10181 ◽  
Author(s):  
Liang Chen ◽  
Yanyan Miao ◽  
Lin Chen ◽  
Peipei Jin ◽  
Yingying Zha ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Synaptic Plasticity
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