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Li G, Chen S, Pholchai N, et al. Continuous control of the nonlinearity phase for harmonic generations. Nat Mater. 2015;14(6):607-12doi: 10.1038/nmat4267.
Li, G., Chen, S., Pholchai, N., Reineke, B., Wong, P. W., Pun, E. Y., Cheah, K. W., Zentgraf, T., & Zhang, S. (2015). Continuous control of the nonlinearity phase for harmonic generations. Nature materials, 14(6), 607-12. https://doi.org/10.1038/nmat4267
Li, Guixin, et al. "Continuous control of the nonlinearity phase for harmonic generations." Nature materials vol. 14,6 (2015): 607-12. doi: https://doi.org/10.1038/nmat4267
Li G, Chen S, Pholchai N, Reineke B, Wong PW, Pun EY, Cheah KW, Zentgraf T, Zhang S. Continuous control of the nonlinearity phase for harmonic generations. Nat Mater. 2015 Jun;14(6):607-12. doi: 10.1038/nmat4267. Epub 2015 Apr 13. PMID: 25849530.
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Nat Mater. 2015 Jun;14(6):607-12. doi: 10.1038/nmat4267. Epub 2015 Apr 13.

Continuous control of the nonlinearity phase for harmonic generations.

Nature materials

Guixin Li, Shumei Chen, Nitipat Pholchai, Bernhard Reineke, Polis Wing Han Wong, Edwin Yue Bun Pun, Kok Wai Cheah, Thomas Zentgraf, Shuang Zhang

Affiliations

  1. 1] School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK [2] Department of Physics, Hong Kong Baptist University, Kowloon Tong, Hong Kong.
  2. 1] Department of Physics, University of Paderborn, Warburger Straße 100 D-33098 Paderborn, Germany [2] Department of Industrial Physics and Medical Instrumentation, King Mongkut's University of Technology North Bangkok, 1518 Pibulsongkram Road, Bangkok 10800, Thailand [3] Lasers and Optics Research Group, King Mongkut's University of Technology North Bangkok, 1518 Pibulsongkram Road Bangkok 10800, Thailand.
  3. Department of Physics, University of Paderborn, Warburger Straße 100 D-33098 Paderborn, Germany.
  4. Department of Electronic Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong.
  5. 1] Department of Electronic Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong [2] State Key Laboratory of Millimeter Waves, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong.
  6. Department of Physics, Hong Kong Baptist University, Kowloon Tong, Hong Kong.
  7. School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK.

PMID: 25849530 DOI: 10.1038/nmat4267

Abstract

The capability of locally engineering the nonlinear optical properties of media is crucial in nonlinear optics. Although poling is the most widely employed technique for achieving locally controlled nonlinearity, it leads only to a binary nonlinear state, which is equivalent to a discrete phase change of π in the nonlinear polarizability. Here, inspired by the concept of spin-rotation coupling, we experimentally demonstrate nonlinear metasurfaces with homogeneous linear optical properties but spatially varying effective nonlinear polarizability with continuously controllable phase. The continuous phase control over the local nonlinearity is demonstrated for second and third harmonic generation by using nonlinear metasurfaces consisting of nanoantennas of C3 and C4 rotational symmetries, respectively. The continuous phase engineering of the effective nonlinear polarizability enables complete control over the propagation of harmonic generation signals. Therefore, this method seamlessly combines the generation and manipulation of harmonic waves, paving the way for highly compact nonlinear nanophotonic devices.

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