Author:
DeLange Jacob,Barua Kinjol,Paul Anindya Sundar,Ohadi Hamid,Zwiller Val,Steinhauer Stephan,Alaeian Hadiseh
Abstract
AbstractCuprous oxide ($$\hbox {Cu}{}_2\hbox {O}$$
Cu
2
O
) has recently emerged as a promising material in solid-state quantum technology, specifically for its excitonic Rydberg states characterized by large principal quantum numbers (n). The significant wavefunction size of these highly-excited states (proportional to $$n^2$$
n
2
) enables strong long-range dipole-dipole (proportional to $$n^4$$
n
4
) and van der Waals interactions (proportional to $$n^{11}$$
n
11
). Currently, the highest-lying Rydberg states are found in naturally occurring $$\hbox {Cu}_2\hbox {O}$$
Cu
2
O
. However, for technological applications, the ability to grow high-quality synthetic samples is essential. The fabrication of thin-film $$\hbox {Cu}{}_2\hbox {O}$$
Cu
2
O
samples is of particular interest as they hold potential for observing extreme single-photon nonlinearities through the Rydberg blockade. Nevertheless, due to the susceptibility of high-lying states to charged impurities, growing synthetic samples of sufficient quality poses a substantial challenge. This study successfully demonstrates the CMOS-compatible synthesis of a $$\hbox {Cu}{}_2\hbox {O}$$
Cu
2
O
thin film on a transparent substrate that showcases Rydberg excitons up to $$n = 8$$
n
=
8
which is readily suitable for photonic device fabrications. These findings mark a significant advancement towards the realization of scalable and on-chip integrable Rydberg quantum technologies.
Publisher
Springer Science and Business Media LLC