METHOD OF CALCULATING PARAMETER OF PHOTONIC CRYSTAL PERIODIC STRUCTURE, PROGRAM, AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To increase the light extraction efficiency of a semiconductor light-emitting element.SOLUTION: Provided is a semiconductor light-emitting element having a photonic crystal periodic structure that consists of two structures with different refractive indexes at one or more interfaces of respective interlayers that configure a semiconductor light-emitting element whose design wavelength is set to . The design wavelength , and a cycle a and a radius R that are parameters of one or more respective periodic structures satisfy a Bragg condition. A ratio (R/a) of the cycle a and the radius R is decided so that a predetermined photonic bandgap (PBG) of TE light becomes the maximum for each periodic structure. Each periodic structure parameter is decided so that a light extraction efficiency of the whole semiconductor light-emitting element to the wavelength becomes the maximum by analysis results of simulation using an FDTD method that is performed by using as variables the cycle a and the radius R decided depending on a degree m of the Bragg condition, and a depth h of the periodic structure of 0.5a or more.