Nonlocal optical properties in InGaN/GaN strained quantum wells with a strong built-in electric field

Abstract

Based on the microscopic nonlocal optical response theory, the linear and nonlinear intersubband optical absorption properties in InyGa1−yN/GaN strained single quantum wells (SQWs) with a strong built-in electric field are investigated. The numerical results show that the optical absorption spectrum has an obvious blueshift originating from the nonlocal optical responses. The dependence of the blueshift on the SQW width and the mixing fraction y is clarified. In addition, the influence of the SQW structural parameters, the incident light intensity, and the incident angle on the optical absorption properties is demonstrated. These properties are desirable for controlling the nonlocal effect and optical absorption loss in optical device application.