Optics plays a crucial role in the field of devices and sensors including optical devices which can be considered as the building blocks of optical systems, networks and interconnects. Optics has also gained advantages in the area of information processing utilizing external Electro-optic (EO) modulators having fast response time and are realizable in either reflection or transmission geometry. Among the known ferroelectric EO materials, lead free Strontium Barium Niobate ( SrxBa(1-x)Nb2O6, SBN) possess highest electro-optic coefficient, pyroelectric coefficient and photorefractive properties. The present work reports about the growth of SBN60 and SBN75 thin films on fused silica substrate utilizing Pulsed Laser Deposition (PLD) technique by varying the laser fluence and deposition pressure. The growth was carried out at a fixed temperature with the repetition rate of 10Hz of the laser. The structural and morphological properties of the films were examined indicating the substantial use of films for EO modulators. Raman and UV -Visible spectroscopy were utilized to determine the band gap and raman active modes of the SBN thin films. Influence of various deposition parameters was studied to obtain the optimized conditions for the growth of a thin film based EO modulator.

Impact of deposition parameters on surface properties of ferroelectric strontium barium niobate (SBN) thin films

ACS Spring Meeting 2021

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