Electroabsorption in the Nonconjugated Conductive Polymer Iodine-doped Polyethylene Terephthalate, an example of Organic Metallic Quantum Dots of Subnanometer Dimensions

Quadratic electro-optic effect in iodine-doped polyethylene terephthalate (PET) has been recently reported along with the magnitudes of the real part of its Kerr coefficients.¹ In this report, we will discuss results of electroabsorption measurements providing values of the imaginary part of Kerr coefficients for different doping levels of iodine. The measurements have been made using ac fields at 4 kHz at 633 nm wavelength which is near the onset of the surface plasmon resonance of PET quantum dots. The magnitude of the imaginary part of Kerr coefficient as we have measured at a low doping level of iodine is ~ 2.3x10^-12 m/V². This is a large magnitude consistent with the subnanometer dimensions of these quantum dots.



1. Mrinal Thakur & Justin Van Cleave (2023) Quadratic electro-optic effect in the nonconjugated conductive polymer iodine-doped polyethylene terephthalate, Journal of Macromolecular Science, Part A, 60:2, 92-96, DOI: 10.1080/10601325.2023.2174443