Dresden 2017 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 65: Quantum Optics on the Nanoscale: From Fundamental Physics to Quantum Technologies (joined session, HL, DS, O, TT, organized by HL)

HL 65.3: Hauptvortrag

Donnerstag, 23. März 2017, 10:30–11:00, HSZ 02

High efficiency and directional emission from a nanoscale light source in a planar optical antenna — •Mario Agio — Laboratory of Nano-Optics, University of Siegen, 57072 Siegen, Germany

Light emission and absorption are critical to applications such as lighting, sensing and information technology. Despite fundamental progress in the manipulation of light-matter interaction, coupling electromagnetic modes to nanoscale sources and detectors with a very high efficiency remains a challenge. Here, we introduce a simple planar antenna structure based on thin-film optics that attains more than 90% outcoupling efficiency and, at the same time, directional emission with a semiangle below 10 degrees [1,2]. Our findings are particularly relevant for materials with a high refractive index, like semiconductor-based nanophotonic devices, which typically exhibit a large mismatch to free-space and guided modes. Furthermore, our approach is general and thus applicable to any wavelength, provided that materials with the required optical properties are available. Finally, we discuss some results in the context of solid-state singlephoton sources.

[1] S. Checcucci et al., Light: Science & Applications 6, e16245 (2017). [2] H. Galal, M. Agio, to be submitted.