Structured light analogy of quantum squeezed states

Zhaoyang Wang; Ziyu Zhan; Anton N. Vetlugin; Jun-Yu Ou; Qiang Liu; Yijie Shen; Xing Fu

doi:10.1038/s41377-024-01631-x

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Structured light analogy of quantum squeezed states

Original Articles

- Structured light analogy of quantum squeezed states
- Light: Science & Applications Vol. 13, Issue 12, Pages: 3139-3150(2024)
- Affiliations：
  
  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 63737l, 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
- Author bio：
  
  Qiang Liu (qiangliu@tsinghua.edu.cn)
  Yijie Shen (yijie.shen@ntu.edu.sg)
  Xing Fu (fuxing@tsinghua.edu.cn)
- Funds：
- DOI：10.1038/s41377-024-01631-x
  CLC：
- Published：31 December 2024，
  
  Published Online：21 October 2024，
  
  Received：25 April 2024，
  
  Revised：03 August 2024，
  
  Accepted：06 September 2024
- Accepted：
Scan QR Code
Wang, Z. Y. et al. Structured light analogy of quantum squeezed states. Light: Science & Applications, 13, 3139-3150 (2024).
DOI：

Wang, Z. Y. et al. Structured light analogy of quantum squeezed states. Light: Science & Applications, 13, 3139-3150 (2024). DOI： 10.1038/s41377-024-01631-x.

摘要

Abstract

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 discrete-variable 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 of

/100 (

/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.

关键词

Keywords

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