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作 者:Zhaoyang Wang Ziyu Zhan Anton N.Vetlugin Jun-Yu Ou Qiang Liu Yijie Shen Xing Fu
机构地区:[1]Department of Precision Instrument,Tsinghua University,Beijing 100084,China [2]State Key Laboratory of Precision Space-Time Information Sensing Technology,Beijing 100084,China [3]Key Laboratory of Photonic Control Technology(Tsinghua University),Ministry of Education,Beijing 100084,China [4]Centre for Disruptive Photonic Technologies,School of Physical and Mathematical Sciences&The Photonics Institute,Nanyang Technological University,Singapore 63737I,Singapore [5]School of Physics and Astronomy,University of Southampton,Southampton,UK [6]School of Electrical and Electronic Engineering,Nanyang Technological University,Singapore 639798,Singapore
出 处:《Light(Science & Applications)》2024年第12期3139-3150,共12页光(科学与应用)(英文版)
基 金:supported by Beijing Natural Science Foundation(JQ23021);the National Research Foundation,Singapore and A-STAR under the Quantum Engineering Programme(QEP-P1 and NRF2021-QEP2-01-P01);support from Nanyang Technologi cal University Start Up Grant,Singapore Ministry of Education(MOE)AcRF Tier 1 grant(RG157/23);MoE AcRF Tier 1 Thematic grant(RT11/23);the UK’s Engineering and Physical Sciences Research Council(EP/T02643X/1);the Royal Society(RG\R2\232531).
摘 要:Quantum optics has advanced our understanding of the nature of light and enabled applications far beyond what is possible with classical light.The unique capabilities of quantum light have inspired the migration of some conceptual ideas to the realm of classical optics,focusing on replicating and exploiting non-trivial quantum states of discretevariable systems.Here,we further develop this paradigm by building the analogy of quantum squeezed states using classical structured light.We have found that the mechanism of squeezing,responsible for beating the standard quantum limit in quantum optics,allows for overcoming the“standard spatial limit”in classical optics:the light beam can be“squeezed”along one of the transverse directions in real space(at the expense of its enlargement along the orthogonal direction),where its width becomes smaller than that of the corresponding fundamental Gaussian mode.We show that classical squeezing enables nearly sub-diffraction and superoscillatory light focusing,which is also accompanied by the nanoscale phase gradient of the size in the order ofλ/100(λ/1000),demonstrated in the experiment(simulations).Crucially,the squeezing mechanism allows for continuous tuning of both features by varying the squeezing parameter,thus providing distinctive flexibility for optical microscopy and metrology beyond the diffraction limit and suggesting further exploration of classical analogies of quantum effects.
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