طراحي سامانه آينه‌ي كاملا دي الكتريك براي طول موج 1064 نانومتر با استفاده از لايه‌هاي ناهمگن

In recent years, the design an‎d optimization of high-performance dielectric mirrors have gained significant importance, particularly for laser applications. In this thesis, the numerical design an‎d simulation of an all-dielectric mirror based on inhomogeneous layers for the wavelength of 1064 nm are investigated. The main objective of this study is to achieve high reflectance at the target wavelength by increasing the design degrees of freedom through a continuous refractive index profile. The optical response of the structure is analyzed using the transfer matrix method, where the inhomogeneous layer is discretized into a series of thin homogeneous sublayers. To optimize the design parameters, including the total thickness, number of cycles, an‎d dielectric material pairs, Monte Carlo–based optimization techniques an‎d simulated annealing algorithms are employed. All numerical simulations are carried out using custom-developed codes in the Python programming environment. The numerical results demonstrate that rugate-type inhomogeneous dielectric mirrors can provide significantly higher reflectance at 1064 nm compared to conventional homogeneous multilayer structures. Furthermore, the choice of substrate, dielectric material combinations, an‎d thickness range plays a crucial role in determining the optical performance of the mirror. The findings of this research indicate that inhomogeneous dielectric structures are promising can‎didates for high-reflectivity mirrors in laser applications.

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