The interaction of light with matter can be engineered by controlling the photonic density of states (PDOS). In this talk I will present some of our recent results on photonic structures that enhance PDOS. Broadband enhancement of spontaneous emission rate, control of the strength of interaction between light and excitons and engineering light extraction will be discussed. Specifically, I will talk about our work on metamaterials that are engineered to have hyperbolic dispersion which allow broadband enhancement of spontaneous emission [1] as well as methods to efficiently extract light from these structures [2]. Following this, I will briefly touch upon our recent work on microcavities embedded with two-dimensional atomic crystals [3] as well as hybrid organic and inorganic excitons that show emergent properties [4].
[1]“Topological transitions in metamaterials,” H. Krishnmoorthy, Z, Jacob, I. Kretzschmar, E. Narimanov, and V. M. Menon, Science 336, 205 (2012).
[2]“Directional out-coupling from active hyperbolic metamaterials,” T. Galfsky, H. Krishnamoorthy, W. Newman, Z. Jacob, E. Narimanov, and V. M. Menon, arXiv 1404.1535, Optica (In press – 2015).
[3]“Strong light-matter coupling in two-dimensional atomic crystals,” X. Liu, T. Galfsky, Z. Sun, F. Xia, E-C. Lin, Y-H Lee, S. Kena-Cohen, and V. M. Menon, arXiv: 1406.4826, Nature Photonics (In press - 2015)
[4]“Room temperature Frenkel-Wannier-Mott hybridization of degenerate excitons in a strongly coupled microcavity,” M. Slootsky, X. Liu, V. M. Menon* and S. R. Forrest*, Phys. Rev. Lett. 112, 076401 (2014).