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Найденный: 4 Экземпляр 0.001 sn
Базы данных : IOP Science ✕Кафедра : Elektrik-Elektronik ... ✕
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Enhanced self-collimation effect by low rotational symmetry in hexagonal lattice photonic crystals

Mirbek TURDUEV

In this study, we present the design of a photonic crystal (PC) structure with a hexagonal lattice, where adjustments to the PC unit cell symmetry reveal an all-angle self-collimation (SC) effect. By optimizing opto-geometric parameters, such as the rotational angle of auxiliary rods and adjacent distances, we analyze the SC property in detail, leveraging group velocity dispersion (GVD) and third-order dispersion (TOD) characteristics. We also investigate the relationship between symmetry properties and their influence on dispersion characteristics. Through symmetry manipulation, we gain a com ...Более

Статья 2024 Mühendislik Fakültesi Physica Scripta99 ( 6 ) 3 Просмотры
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Inverse design of ultra-compact photonic gates for all-optical logic operations

Mirbek TURDUEV

Logic gates have great importance in realization of rapid data transmission as well as low loss transfers. In this paper, a multi-objective inverse-design approach is implemented by using objective-first algorithm to design optical AND, OR, NAND and NOT logic gates on Si-platform at the design wavelength of 1.30 mu m. For all gates, the design area is fixed to 2.24 mu m x 2.24 mu m. The optical logic '1' output is accepted to be optical power values greater than 0.8 times of the input optical power. By implementing a Bias waveguide as well as two input ports, we made it possible to achieve log ...Более

Статья 2022 Mühendislik Fakültesi Journal of Physics D: Applied Physics55 ( 21 ) 76 Просмотры
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Enhancing the stability of environmental resistance of alloyed CdZnSeS@ZnS quantum dots by doping Ti ions into shell layer

Mehmet ERTUĞRUL

Colloidal quantum dots (QDs) are promising luminescent materials for display and lighting, but their stability has long been an issue. Here, we designed a passivation strategy of doping Ti ions into the shell of alloyed CdZnSeS@ZnS QDs. The results showed that Ti ions were successfully doped into the ZnS shell and the stability of QDs was improved. In the aging test, the Ti ions doped QDs maintained 51.4 of the initial performance after 90 h of aging, while the pristine QDs decreased to less than 25 of the initial value. In addition, we discuss the reasons why Ti ions doping improves the stabi ...Более

Статья 2022 Mühendislik Fakültesi Nanotechnology33 ( 50 ) 45 Просмотры
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Curved beam generation and its experimental realization by rectangular prism with asymmetric polynomial back surface

Mirbek TURDUEV

With the discovery of self-accelerating beams, possibility of obtaining curved light beams in free space has been realized. These special beams paved the way for many new applications as well as the exploration of novel beam types. Recently, great research effort has been conducted to realize different types of curved beams such as photonic hook and airy beam. These curved types of beams are obtained by introducing structural asymmetry or applying non-uniform dielectric distribution to the input and output face of the structure. With this regard, we propose specially designed asymmetric struct ...Более

Статья 2023 Mühendislik Fakültesi Physica Scripta98 ( 1 ) 79 Просмотры
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