We propose modification to gain spectra of semiconductor quantum heterostructures by incorporation of nanostructured metal, paving the way for tailor made “meta-gain” media. We show that the wavelength dependence of the principal direction of energy propagation in media with hyperbolic dispersion leads to blue-shifting of peak photoluminescence (PL), and thereby optical gain, relative to emission from the bare semiconductor. Additionally we show that emission spectra from metal-semiconductor hyperbolic metasurfaces depends strongly upon the polarization of an external optical pump. The simultaneous co-optimization of pump properties and optical and electronic densities of states provides a platform for not only compensating losses in metallic metamaterials, but also designing emission spectra beyond that provided by the constituent quantum heterostructures.
Joseph S. T. Smalley, Felipe Vallini, Sergio Montoya, Lorenzo Ferrari, Shiva Shahin, Conor T. Riley, Eric E. Fullerton, Boubacar Kante, Zhaowei Liu, and Yeshaiahu Fainman, "Near-infrared meta-gain media based on hyperbolic metasurfaces
(Conference Presentation)," Proc. SPIE 9920, Active Photonic Materials VIII, 992019 (Presented at SPIE Nanoscience + Engineering: August 30, 2016; Published: 9 November 2016); https://doi.org/10.1117/12.2239578.5159519956001.
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