منابع مشابه
control of the optical properties of nanoparticles by laser fields
در این پایان نامه، درهمتنیدگی بین یک سیستم نقطه کوانتومی دوگانه(مولکول نقطه کوانتومی) و میدان مورد مطالعه قرار گرفته است. از آنتروپی ون نیومن به عنوان ابزاری برای بررسی درهمتنیدگی بین اتم و میدان استفاده شده و تاثیر پارامترهای مختلف، نظیر تونل زنی(که توسط تغییر ولتاژ ایجاد می شود)، شدت میدان و نسبت دو گسیل خودبخودی بر رفتار درجه درهمتنیدگی سیستم بررسی شده اشت.با تغییر هر یک از این پارامترها، در...
15 صفحه اولFull-Potential Optical Calculations of Lead Chalcogenides
We report on ab initio calculations of the optical properties of the lead chalcogenides PbS, PbSe, and PbTe performed with a relativistic full-potential linear muffin-tin orbital method within the local density approximation. Our calculated spectra are in excellent agreement with recent ellipsometry measurements. The origin of the peaks in the spectra is discussed, as well as the effects of inc...
متن کاملFirst Principles Study of Electronic and Optical Properties of Magnesium based Chalcogenides
The electronic and optical properties of MgSxX1−x (X =Se, Te), and MgSexTe1−x (0 ≤ x ≤ 1) ternary alloys are investigated using the full potential linearized augmented plane wave (FP-LAPW) method within the density functional theory (DFT). The direct band gap energies vary in the ranges 2.854–3.864 eV, 2.470–3.864 eV, and 2.470–2.854 eV for MgSxSe1−x, MgSxTe1−x, and MgSexTe1−x, respectively. Th...
متن کاملOptical Properties of All-inorganic Metal-halide Perovskites and Metal Chalcogenides Colloidal Nano-crystals
Colloidal nanocrystals (NCs) are of considerable interest due to their size-dependent optical and electronic properties, which allow their implementation in photovoltaic cells, light-emitting diodes, photo-detectors and more. Along with the development of the synthesis procedures, numerous investigations have explored the optical and electronic properties of different NCs, involving the study o...
متن کاملCrystal Chemistry, Growth and Properties of Multi-cation Chalcogenides
— The major families of ternary compounds and their structures are reviewed, followed by a discussion of synthesis and crystal growth methods for ternary chalcogenides. Finally, a survey is given on a variety of recently synthesized multi-cation chalcogenides and some of their properties. 1. Scope and definitions. — To the vast majority of the participants of the Second International Conference...
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ژورنال
عنوان ژورنال: Research & Development in Material Science
سال: 2018
ISSN: 2576-8840
DOI: 10.31031/rdms.2018.06.000645