Optical-induced absorption tunability of Barium Strontium Titanate film期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Optical-induced absorption tunability of Barium Strontium Titanate film

Affiliation:	1. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China;2. School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China;3. College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China;4. Institute of Information Science and Technology, Department of Physics and Mechanical & Electrical Engineering, Hubei University of Education, Wuhan 430205, China;1. Grupo de Materia Condensada-UdeA, Instituto de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia;2. Centro de Investigación en Ciencias-(IICBA), Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, 62209, Cuernavaca, Morelos, Mexico;3. Universidad EIA, CP 055428, Envigado, Colombia;4. Grupo de Física de Materiales, Universidad Pedagógica y Tecnológica de Colombia, Tunja, Colombia;5. Cumhuriyet University, Physics Department, 58140, Sivas, Turkey;1. Institut des Molécules et Matériaux du Mans (IMMM), UMR CNRS 6283, Université du Maine, Av. O. Messiaen, 72085 Le Mans Cedex 09, France;2. Laboratoire de Chimie Inorganique, Université de Sfax, Faculté des Sciences de Sfax, BP 1171, 3000 Sfax, Tunisia;3. Laboratoire de Photonique d’Angers (LPHIA), Université d’Angers, 2Bd. Lavoisier, 49045 Angers, France;1. Laboratório de Instrumentação e Fotônica, Programa de Engenharia Elétrica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-598, Brazil;2. Instituto de Física, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, 20559-900, Brazil;3. Departamento de Física, Pontifícia Universidade Católica do Rio de Janeiro, Rio de Janeiro, RJ, 22453-900, Brazil;4. Instituto Politécnico, Universidade do Estado do Rio de Janeiro, P.O. Box 97282, Nova Friburgo, RJ, 28601-970, Brazil;1. Air Force Research Laboratory, Sensors Directorate, Wright Patterson AFB, OH, 45433, USA;2. SURVICE Engineering, Dayton, OH, 45431, USA

Abstract:	The absorption tunability of 100 nm thickness of ferroelectric Barium Strontium Titanate (Ba_0.5Sr_0.5TiO₃) thin films with different densities of pumped optical field is measured by terahertz time-domain spectroscopy in the range of 0.2 THz – 1.2 THz at 19 °C. Experimental results show that the absorption coefficient of BST film is approximately at 5000 cm⁻¹–20000 cm⁻¹ in the range of 0.2 THz – 1.2 THz and the absorption coefficient reached up to 16% when we applied the optical field up to 600 mW. The theoretical calculations reveal that increasing photoexcitation fluences is responsible for the increasing of transmission change in the conduction current density cause the absorption coefficient varied.

Keywords:	Optical tunability Absorption response THz
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