193 citations · 344 across the 12 of their papers we have counts for
13 papers
Fractional Dimensional Approach to Dielectric Tuning Effects on Excitonic Parameters in 2D semiconductor materials
Lakshminarayan Sharma, Carlos Rodriguez-Fernandez, Humeyra Caglayan
We demonstrated the potential of the fractional dimensional approach to understand exciton parameters in the exemplary atomically thin semiconductor material, a monolayer of WS…
Ultrafast optical properties of stoichiometric and non-stoichiometric refractory metal nitrides TiNx, ZrNx, and HfNx
Jaroslaw Judek, Rakesh Dhama, Alessandro Pianelli +4
Refractory metal nitrides have recently gained attention in various fields of modern photonics due to their cheap and robust production technology, silicon-technology compatibility…
New horizons in near-zero refractive index photonics and hyperbolic metamaterials
Michaël Lobet, Nathaniel Kinsey, Iñigo Liberal +7
The engineering of the spatial and temporal properties of both the electric permittivity and the refractive index of materials is at the core of photonics. When vanishing to zero,…
Two-color all-optical switching in Si-compatible epsilon-near-zero hyperbolic metamaterials
Alessandro Pianelli, Rakesh Dhama, Jaroslaw Judek +2
All-optical ultrafast switches enabled by artificial materials are considered at the forefront of the next generation of photonic communications and data processing. During the las…
Dual-Band Metal-Insulator-Metasurface Absorber
Ibrahim Issah, Carlos Rodríguez Fernández, Mohsin Habib +2
We explored a metal-insulator-metasurface structure exhibiting dual-band absorption in the visible and infrared regions with almost perfect absorbance. We demonstrated that the exi…
Hot electron dynamics and relaxation in hyperbolic meta-antennas
Rakesh Dhama, Mohsin Habib, Alireza R. Rashed +1
Conventional plasmonic nanoantennas enable scattering and absorption bands at the same wavelength region, making their utilization to full potential impossible for both features si…
Epsilon-near-zero nanoparticles
Ibrahim Issah, Jesse Pietila, Tommi Kujala +3
In this work, we propose epsilon-near-zero (ENZ) nanoparticles formed of metal and dielectric bilayers and employ the effective medium approach for multilayered nanospheres to stud…
All-optical switching via coherent control of plasmon resonances
Rakesh Dhama, Ali Panahpour, Tuomas Pihlava +2
A novel ultrafast all-optical switching mechanism is demonstrated theoretically and experimentally based on a plasmonic analog of the effect of \textit{Enhancement of Index of Refr…
Rolled-up Epsilon-near-zero Waveguide reservoir for long-range qubit entanglement
Ibrahim Issah, Mohsin Habib, Humeyra Caglayan
Preservation of the entangled state of a quantum system is relevant in quantum applications. However, the preservation of entangled states is constrained due to the energy dissipat…
Metamaterials designed for enhanced ENZ properties]{Metamaterials designed for enhanced ENZ properties
Matias Koivurova, Tommi Hakala, Jari Turunen +3
We examine layered metamaterial structures consisting of alternating films of epsilon-near-zero (ENZ) and dielectric material, and show that for such a stack it is possible to enha…
Hot Electron Dynamics in Ultrafast Multilayer Epsilon-Near-Zero Metamaterial
Alireza R. Rashed, Bilge Can Yildiz, Surya R. Ayyagari +1
Realizing remarkable tunability in optical properties without sacrificing speed is critical to obtain all optical ultrafast devices. In this work, we investigate the ultrafast temp…
Electrically Switchable Metadevices via Graphene
Osman Balci, Nurbek Kakenov, Ertugrul Karademir +6
Metamaterials bring sub-wavelength resonating structures together to overcome the limitations of conventional materials. The realization of active metadevices has been an outstandi…
Chiral metamaterials with negative refractive index based on four "U" split ring resonators
Zhaofeng Li, Rongkuo Zhao, Thomas Koschny +5
A uniaxial chiral metamaterial is constructed by double-layered four "U" split ring resonators mutually twisted by 90 degrees. It shows a giant optical activity and circular dichro…