39 citations · 117 across the 11 of their papers we have counts for
11 papers
All-Optical Control of Ultrafast Plasmon Resonances in the Pulse-Driven Extraordinary Optical Transmission
Hira Asif, Mehmet Emre Tasgin, Ramazan Sahin
Understanding the ultrafast processes at their natural-time scale is crucial for controlling and manipulating nanoscale optoelectronic devices under light-matter interaction. Here,…
Green Synthesis and the formation kinetics of silver nanoparticles in aqueous Inula Viscosa extract
Esra Zeybekoğlu Okka, Timur Tongur, Taner Tarik Aytas +3
In this study, we present the production of silver nanoparticles in aqueous Inula Viscosa extract by the green synthesis approach at room temperature. The structural, morphological…
Silent-enhancement of multiple Raman modes via tuning optical properties of graphene nanostructures
Asli Gencaslan, Taner Tarik Aytas, Hira Asif +2
Raman scattering signal can be enhanced through localization of incident field into sub-wavelength hot-spots through plasmonic nano-structures (Surface-enhanced Raman scattering-SE…
Modulating the temporal dynamics of nonlinear ultrafast plasmon resonances
Hira Asif, Ramazan Sahin
Spatio-temporal control of ultrafast plasmon resonances has gained research interest in recent years because of their tremendous implications in nonlinear optics and ultrafast quan…
Single-molecule-resolution ultrafast near-field optical microscopy via plasmon lifetime extension
Rasim Volga Ovali, Ramazan Sahin, Alpan Bek +1
A recent study shows that: when a long lifetime particle is positioned near a plasmonic metal nanoparticle, lifetime of plasmon oscillations extends, but, "only" near that long-lif…
Ultra-large actively tunable photonic band gaps via plasmon-analog of index enhancement
Emre Yuce, Ahmet Kemal Demir, Zafer Artvin +3
We present a novel method for active continuous-tuning of a band gap which has a great potential to revolutionize current photonic technologies. We study a periodic structure of x…
Direct micro-structuring of Si(111) surfaces through nanosecond-laser Bessel beams
Erkan Demirci, Elif Turkan Aksit Kaya, Ramazan Sahin
We present here a nanosecond laser ablation of Si(111) wafer with diffraction-free (Bessel-) beams. First, the Axicon a conical shaped optical element for beam shaping is char…
A quantum emitter coated with graphene interacting in the strong coupling regime
Mehmet Günay, Vasilios Karanikolas, Ramazan Sahin +3
We demonstrate the strong coupling of a quantum dot and a graphene spherical shell coating it. Our simulations are the exact solutions of 3D Maxwell equations. Interaction produces…
Nanosecond laser ablation of Si(111) under an aqueous medium
Erkan Demirci, Elif Turkan Aksit Kaya, Ramazan Sahin
Nanosecond laser ablation of p-type Si(111) wafer is presented under an ambient, a water and a glycerin conditions. Effects of pulse energy, number of pulses and type of environmen…
Exact solution of an exciton energy for a monolayer medium
Abdullah Guvendi, Ramazan Sahin, Yusuf Sucu
We present exact solutions of an energy spectrum of 2-interacting particles in which they seem to be relativistic fermions in 2+1 space-time dimensions. The 2x2 spinor equations of…
Ultra-high resolution aSNOM imaging at off-resonant wavelengths
Ramazan Sahin, Mehmet Gunay, Alpan Bek +1
An atomic force microscope~(AFM) tip, with a few nm-thick noble metal coating, gives rise to strong electric-field at the near-field of tip apex, i.e. hot spot, when illuminated wi…