Quantum-Size-Controlled Photoelectrochemical Fabrication of Epitaxial InGaN Quantum Dots
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solar (photovoltaic), solid state lighting, phonon↗
Engineering topics
Subramania, Ganapathi S.
Publications and source records attributed to Subramania, Ganapathi S..
Toward Smart and Ultra-efficient Solid-State Lighting
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solar (photovoltaic), solid state lighting, phonon↗
Epsilon near zero material for electromagnetic energy transport through sub-wavelength channels
Confining and enhancing light within deep subwavelength volumes is key to the enhancement of light-matter interaction with great implications in the control of absorption and emission rates, as well as in attaining high optical nonlinearities and/or gain. Efficient transport of electromagnetic energy through subwavelength channels in the optical regime can dramatically enhance the performance of subwavelength imaging, photovoltaics, sensing and light emission. Current approaches based on plasmonic structures or negative index metamaterials tend to be lossy due to material absorption and have a small bandwidth due to reliance on r esonance behavior. Recently, epsilon-near-zero (ENZ) material has been proposed as a way to achieve efficient subwavelength electromagnetic energy transport. E NZ materials have near-zero dielectric constant (epsilon) in the effective medium limit r esulting in an unusually large effective wavelength even at optical frequencies is thus expected to enable energy squeezing and transfer through subwavelength channels with lower losses over larger bandwidth. The optical properties of materials which is the response to an applied external electromagnetic field can be expressed using the relative permittivity(ε) and the relative permeability(µ) of the medium.
Subramania, Ganapathi S.↗