Browsing by Author "Eftekhari, Zeinab"

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Investigation of optical residual absorption in graphene

Eftekhari, Zeinab (Bilkent University, 2018-02)

Graphene, a 2-dimensional crystal of carbon, can absorb 2.3% of light over a very broad spectrum. Doped graphene, however has a gap in optical absorption due to the Pauli blocking principle. For doped graphene, the interband ...
Lithography-free disordered metal–insulator–metal nanoantennas for colorimetric sensing

Eftekhari, Zeinab; Ghobadi, Amir; Özbay, Ekmel (OSA - The Optical Society, 2020)

The colorimetric detection of bio-agent targets has attracted considerable attention in nanosensor designs. This platform provides an easy to use, real-time, and rapid sensing approach, as the color change can be easily ...
Strong light emission from a defective hexagonal boron nitride monolayer coupled to near-touching random plasmonic nanounits

Eftekhari, Zeinab; Ghobadi, Amir; Soydan, Mahmut Can; Yıldırım, Deniz Umut; Cinel, Neval Ayşegül; Özbay, Ekmel (Optica, 2021-04)

In this Letter, we demonstrate strong light emission from defective hexagonal boron nitride (hBN) defect centers upon their coupling with disorder near-touching plasmonic units. Based on numerical simulations and ...