Nonlinear optical characterization and measurement of optical limiting threshold of CdSe quantum dots prepared by a microemulsion technique
| Autor: | P. Radhakrishnan, Bishwajeet Singh Bhardwaj, Santhi Ani Joseph, C. P. G. Vallabhan, Deep Punj, Amit D. Saran, Jayesh R. Bellare, S. Mathew, V. P. N. Nampoori |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Materials science
Fabrication Cdte Absorption Emission Clusters Optics Figure of merit Z-Scan Technique Microemulsion Electrical and Electronic Engineering Polymer Saturation (magnetic) Potential well business.industry Enhancement Condensed Matter Physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Nanocrystals Nonlinear system Quantum dot Attenuation coefficient Optoelectronics Nanoparticles business |
| Zdroj: | IndraStra Global. |
| ISSN: | 2381-3652 |
| DOI: | 10.1007/s10854-011-0481-z |
| Popis: | CdSe quantum dots prepared by micro emulsion technique shows quantum confinement effect and broad emission at 532 nm. These quantum dots have about 4.35 nm size, and they exhibit good nonlinear effects which are measured using z-scan technique. The samples have a reverse saturation in the nonlinear absorption as nonlinear optical absorption coefficient β is 2.545 × 10−10 W m−1 and nonlinear optical refraction coefficient n 2 is −1.77 × 10−10 esu. The third-order nonlinear optical susceptibility is found to be 4.646 × 10−11 esu and also the figure of merit is 2.01 × 10−12 esu m. The optical limiting threshold which is found to be 0.346 GW/cm2 makes it a good candidate for device fabrication. |
| Databáze: | OpenAIRE |
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