Investigation of Nonlinear Optical Processes in Mercury Sulfide Quantum Dots

Nanomaterials

Andrey I. Zvyagin¹  Oleg V. Ovchinnikov¹  Anatolijs Sarakovskis²  Arturs Bundulis²  Jurgis Grube²  Vyacheslav V. Kim³  Rashid A. Ganeev³  Rawda Kholany⁴  Anna A. Lizunova⁴  Alaa A. Mardini⁴  Ivan A. Shuklov⁴ 

[1] Department of Physics, Voronezh State University, 394006 Voronezh, Russia;Institute of Solid State Physics, University of Latvia, Kengaraga 8, LV-1063 Riga, Latvia;Laboratory of Nonlinear Optics, University of Latvia, Jelgavas 3, LV-1004 Riga, Latvia;Moscow Institute of Physics and Technology, National Research University, 141701 Dolgoprudny, Russia;

关键词: quantum dots;    mercury sulfide;    third-harmonic generation;    nonlinear refraction;    nonlinear absorption;   

DOI  :  10.3390/nano12081264

来源: DOAJ

【 摘 要 】

The authors report the third-harmonic generation, nonlinear refraction, and nonlinear absorption in HgS quantum dot (QD) suspensions and films using the nanosecond and femtosecond pulses. High conversion efficiency (7 × 10⁻⁴) towards the third harmonic (TH) of the 900–1700 nm, 150 fs laser in the thin (70 nm) films containing HgS QDs deposited on the glass substrates is obtained. The authors analyze spectral dependencies of the TH, nonlinear refractive indices, and nonlinear absorption coefficients of QDs in the 500–1700 nm range and discuss the relation between the TH process and the low-order nonlinear optical properties of these quantum dots.

【 授权许可】

Unknown