We compensate for the losses in 3D arrays of nanoshells through quantum dots embedded in the nanoshells' cores, to achieve ε-near-zero metamaterials at optical frequencies. Results show loss-compensation or gain-capability in a narrow frequency band. © 2012 OSA.

We compensate for the losses in 3D arrays of nanoshells through quantum dots embedded in the nanoshells' cores, to achieve ε-near-zero metamaterials at optical frequencies. Results show loss-compensation or gain-capability in a narrow frequency band. © OSA 2012.

We theoretically investigate harmonic generation at ε=0 crossing points where losses are compensated through the inclusion of active photonic materials in metallic nanoshells. This singularity-driven process lowers the thresholds for a plethora of nonlinear optical phenomena. © 2012 OSA.

We predict enhanced second-harmonic generation in low-damping epsilon-near-zero slabs made of plasmonic nanoshells. We further discuss the contribution of nonlocal effects induced by free-electron gas pressure in metals to the nonlinear response of the slab. © OSA 2013.

We theoretically investigate harmonic generation at ε=0 crossing points where losses are compensated through the inclusion of active photonic materials in metallic nanoshells. This singularity-driven process lowers the thresholds for a plethora of nonlinear optical phenomena. © OSA 2012.

We theoretically investigate harmonic generation at ε=0 crossing points where losses are compensated through the inclusion of active photonic materials in metallic nanoshells. This singularity-driven process lowers the thresholds for a plethora of nonlinear optical phenomena. © OSA 2012.

We theoretically investigate harmonic generation at ε=0 crossing points where losses are compensated through the inclusion of active photonic materials in metallic nanoshells. This singularity-driven process lowers the thresholds for a plethora of nonlinear optical phenomena. © OSA 2012.

We present a complex-mode analysis of an ε-near-zero metamaterial slab made of chains of core-shell nanocylinders. The mesoscopic nature of the slab induces narrowband, strong, effective nonlocal response mediated by leaky modes. © OSA 2013.