سوییچ‌های نوری مبتنی بر مواد تغییر دهنده فاز ژرمانیوم آنتیموان تلوراید بر بستر ایندیوم فسفاید در پنجره طول‌موج 1/55 میکرومتر

در این مقاله روش جدیدی برای تشخیص یون های کادمیوم با نانوذرات ag@teos-im در مایعات ارائه شده. خواص اپتیکی این نانوذرات به تنهایی و پس از افزودن کادمیوم بررسی شده، و گزارش شده است که با حضور کادمیوم ضریب جذب خطی و مقدار عددی ضریب شکست غیر خطی  بیشتر شده است.

design and simulation of optical modulator based on gst phase change material on inp platform

abstract- in this research, for the first time, an optical modulator has been designed and simulated using gst phase change material on the inp substrate at a wavelength of 1.55 μm. first, the proposed structure was analyzed by comsol and lumerical software to calculate the modes and light propagation, and then the optimal thickness for each layer was obtained for optimal performance. due to the fact that the gst phase change material used in this structure has stable amorphous and crystalline phases, and the amorphous and crystalline phases have the lowest and highest light absorption coefficients, respectively. therefore, if the proper length of the modulator is chosen, when the gst phase change material is placed in the amorphous and crystalline phases, the light will be propagated with the least and the most loss, respectively. in the following, the curves related to the real and imaginary parts of the effective refractive index of the proposed structure have been calculated for tm modes in each of the amorphous and crystalline phases of the gst phase change material.