Coherent modulation of two-photon up-conversion from colloidal quantum dots by femtosecond laser

RSC Advances ◽  
2015 ◽  
Vol 5 (99) ◽  
pp. 80998-81002 ◽  
Author(s):  
Cheng Xu ◽  
Yunhua Yao ◽  
Chaodan Pu ◽  
Shian Zhang ◽  
Xiaofeng Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Femtosecond Laser ◽  
Pulse Shaping ◽  
Colloidal Quantum Dots ◽  
Two Photon ◽  
Shaping Technique ◽  
Coherent Modulation

The coherent modulation of up-conversion PL of colloidal quantum dots by femtosecond laser has been experimentally and theoretically achieved, which proves that the fs pulse shaping technique can provide an effective method to control two-photon PL.

High-Resolution In Situ Patterning of Perovskite Quantum Dots via Femtosecond Laser Direct Writing

Nanoscale ◽  
2021 ◽  
Author(s):  
Shuyu Liang ◽  
Yue-Feng Liu ◽  
Shenyuan Wang ◽  
Hong Xia ◽  
Hong-Bo Sun
Keyword(s):  
Quantum Dots ◽  
High Resolution ◽  
Femtosecond Laser ◽  
Information Storage ◽  
Colloidal Quantum Dots ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Perovskite Quantum Dots ◽  
Patterning Technique

Colloidal quantum dots (QDs) have exhibited great potentials for optoelectronic applications, including display, laser, anti-counterfeiting and information storage. However, high-resolution patterning technique of QDs is still a challenge, while precise...

TWO-PHOTON ABSORPTION IN QUANTUM DOTS OFCdSxSe1-xUSING OPEN APERTURE Z-SCAN AND FEMTOSECOND LASER

NANO ◽  
2009 ◽  
Vol 04 (01) ◽  
pp. 23-29 ◽  
Author(s):  
JITENDER KUMAR ◽  
A. VERMA ◽  
P. K. PANDEY ◽  
P. K. BHATNAGAR ◽  
P. C. MATHUR ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Femtosecond Laser ◽  
Photon Absorption ◽  
Open Aperture ◽  
Annealing Duration ◽  
Third Order ◽  
Two Photon Absorption ◽  
Two Photon ◽  
The Third ◽  
Rate Of Increase

Two-photon optical nonlinear absorption has been studied in quantum dots of CdSxSe1-xgrown in borosilicate glass matrix by two-step annealing technique. Femtosecond laser and open aperture Z-scan technique has been used for measuring the third-order nonlinear two-photon absorption coefficient (β(3)). Only the third-order and not the fifth-order nonlinear effects are observed at low intensities (1.6–3.2 GW cm-2) of laser used in the present experiment. At such low intensities, the variation of β(3)is found to be almost intensity-independent. For a given annealing duration of the quantum dots, the value of β(3)is found to be higher for sulfur-rich samples as compared to that for selenium-rich samples. This is attributed to the presence of shallow traps formed due to sulfur vacancies in the sulfur-rich samples. Further, the value of β(3)increases with the increase in the size of quantum dots and the rate of increase of β(3)with the increase of average radius is found to be higher for sulfur-rich samples.

Two-Photon Absorption in CdSe Colloidal Quantum Dots Compared to Organic Molecules

ACS Nano ◽  
2014 ◽  
Vol 8 (12) ◽  
pp. 12572-12586 ◽  
Author(s):  
Nikolay S. Makarov ◽  
Pick Chung Lau ◽  
Christopher Olson ◽  
Kirill A. Velizhanin ◽  
Kyril M. Solntsev ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Organic Molecules ◽  
Photon Absorption ◽  
Colloidal Quantum Dots ◽  
Two Photon Absorption ◽  
Two Photon

scholarly journals Two-photon upconversion luminescence of CdTe quantum dots in silicate glasses irradiated by an infrared femtosecond laser

2018 ◽  
Vol 8 (6) ◽  
pp. 1484 ◽  
Author(s):  
Hening Wang ◽  
Quan-Zhong Zhao ◽  
Jing Qian ◽  
Xiaobo Jiang ◽  
Kongyu Lou ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Femtosecond Laser ◽  
Upconversion Luminescence ◽  
Silicate Glasses ◽  
Cdte Quantum Dots ◽  
Two Photon
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