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Study of third-order NLO properties of organic dye for optoelectronics applications



  1. Department of Physics, School of Engineering and Technology, Surya Group of Institutions, Villupuram – 605652, Tamilnadu, India


Third-order nonlinear optical properties of aqueous solutions of methylene blue dye with different concentrations were studied by Z─scan technique. The magnitude of nonlinear refractive index (n2), nonlinear absorption coefficient (β) and thirdorder nonlinear optical susceptibility (χ (3)) were found to be the order of 10–7 cm2 /W, 10–2 cm/W and 10–5 esu, respectively. The dye sample possesses a large negative nonlinear index of refraction due to self-defocusing phenomena and saturable absorption behavior with significant nonlinear absorption coefficient. The experimental results revealed that the dye sample studied here may be a potential material for future photonics and optoelectronics applications.


NLO, Organic dye, Z–scan method.


S. JEYARAM, Study of third-order NLO properties of organic dye for optoelectronics applications, Optoelectronics and Advanced Materials - Rapid Communications, 15, 1-2, January-February 2021, pp.62-66 (2021).

Submitted at: Sept. 5, 2018

Accepted at: Feb. 12, 2021