Few-photon all-optical phase rotation in a quantum-well micropillar cavity
Few-photon all-optical phase rotation in a quantum-well micropillar cavity
复制标题
量子阱微柱腔中的少光子全光相位旋转
DOI:
10.1038/s41566-022-01019-6
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发表时间:
2022
期刊:
影响因子:
35
通讯作者:
Kuriakose T
中科院分区:
文献类型:
--
作者:
Kuriakose T
Photonic platforms are an excellent setting for quantum technologies as weak photon–environment coupling ensures long coherence times. The second key ingredient for quantum photonics is interactions between photons, which can be provided by optical nonlinearities in the form of cross-phase modulation. This approach underpins many proposed applications in quantum optics, , , , , –and information processing, but achieving its potential requires strong single-photon-level nonlinear phase shifts as well as scalable nonlinear elements. In this work we show that the required nonlinearity can be provided by exciton–polaritons in micropillars with embedded quantum wells. These combine the strong interactions of excitons,with the scalability of micrometre-sized emitters. We observe cross-phase modulation of up to 3 ± 1 mrad per polariton using laser beams attenuated to below the average intensity of a single photon. With our work serving as a stepping stone, we lay down a route for quantum information processing in polaritonic lattices.
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