5 papers
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…