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Publication year : 2022 ✕Publisher : IOP Publishing ✕
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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 ...More

Article 2022 Mühendislik Fakültesi Journal of Physics D: Applied Physics55 ( 21 ) 76 Views
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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 ...More

Article 2022 Mühendislik Fakültesi Nanotechnology33 ( 50 ) 45 Views
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