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Moiré cavity quantum electrodynamics
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DOI：10.1126/sciadv.adv8115.png)
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Abstract
En 中文
Quantum emitters are a key component in photonic quantum technologies. Enhancing single-photon emission by engineering their photonic environment is essential for improving overall efficiency in quantum information processing. However, this enhancement is often limited by the need for ultraprecise emitter placement within conventional photonic cavities. Inspired by the fascinating physics of moir & eacute; pattern, we propose a multilayer moir & eacute; photonic crystal with a robust isolated flatband. Theoretical analysis reveals that, with nearly infinite photonic density of states, the moir & eacute; cavity simultaneously has a high Purcell factor and large tolerance over the emitter's position, breaking the constraints of conventional cavities. We then experimentally demonstrate various cavity quantum electrodynamic phenomena with a quantum dot in moir & eacute; cavity. A large tuning range (up to 40-fold) of quantum dot's radiative lifetime is achieved through strong Purcell enhancement and inhibition effects. Our findings open the door for moir & eacute; flatband cavity-enhanced quantum light sources and quantum nodes for the quantum internet.
Keywords:
SOLID-STATE SOURCE
SPONTANEOUS EMISSION
DOT
INHIBITION
GENERATION
DYNAMICS
PHOTONS
LIGHT
GATE