Integrating quantum emitters in low-dimensional materials with nanocavities*

It was recently shown that low-dimensional materials such as 1D single-walled carbon nanotubes (SWCNTs) as well as 2D materials such as transition-metal dichalcogenides (TMDCs) and hexagonal boron nitride (hBN) can host 0D-confined quantum emitters. These quantum emitters hold great promise for future quantum technologies, particularly through covalent sidewall functionalization of SWCNTs resulting in quantum
light emission at room temperature into telecom bands, through local strain-engineering in monolayer TMDCs providing spatial scalability, and via color centers in hBN that survive up to 800 K. Here we review our recent work integrating these quantum emitters into optical cavities. We will first focus on coupling to metallo-dielectric antennas and demonstrate near-unity light collection efficiency for SWCNTs [1,2] and hBN emitters. The second part of the talk focuses on reversible and deterministic coupling schemes of excitons with respect to nanoplasmonic gap-mode cavities in SWCNTs [3] and strain-induced excitons in TMDCs [4]. We will further discuss methods to increase the quantum emitter yield to near unity, ways to increase thermal stability for excitons in TMDCs, as well as discuss our latest work on indistinguishable single photon
generation.

References
[1] Shayan, K. et al., ACS Photonics 5, 289–294 (2017).
[2] Shayan, K. et al., Nanoscale 10, 12631–12638 (2018).
[3] Luo, Y. et al., Nature Communications 8, 1413 (2017).
[4] Luo, Y. et al., Nature Nanotechnology (2018). doi:10.1038/s41565-018-0275-z