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Size effect on all-optical switching of CdSe/ZnS quantum dots

M. D. ZIDAN1,* , A. ALLAHHAM1, A. GHANEM2, N. MOUSA3, A. AL SALMAN4

Affiliation

  1. Department of Physics, AEC, P. O. Box 6091, Damascus, Syria
  2. Higher Institute for Laser Research and Applications, Damascus University, Damascus, Syria
  3. Scientific office, AEC, P. O. Box 6091, Damascus, Syria
  4. Faculty of Electrical and mechanical Engineering, Damascus University, Damascus, Syria

Abstract

Our research will investigate the effect of quantum dots (QDs) sizes of Cadmium Selenide (CdSe) on the all-optical switching phenomena. The study was carried out using two continuous wave lasers, a pump green laser (λ = 532 nm) and a probe red laser (λ = 635 nm). The results of our work have shown that the size of CdSe QDs effect has a strong influence on the all-optical switching phenomena. The size of the QDs effect is used as an efficient way to control the all-optical switching processes. Our results show that a strong pump beam can modify the low-power probe beam by generating diffraction ring patterns, which confirms the possibility of changing and modifying the probe's laser beam signal standardise as OFF/ON through nonlinear optical switching processes..

Keywords

Diffraction ring patterns, CdSe Quantum dots, All-optical switching effect, Spatial cross phase modulation.

Submitted at: July 31, 2025
Accepted at: Aug. 4, 2026

Citation

M. D. ZIDAN, A. ALLAHHAM, A. GHANEM, N. MOUSA, A. AL SALMAN, Size effect on all-optical switching of CdSe/ZnS quantum dots, Journal of Optoelectronics and Advanced Materials Vol. 28, Iss. 7-8, pp. 321-328 (2026)