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  • Matters Arising
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Reply to: Reconsidering metasurface lasers

Nature Photonics volume 15, pages 339–340 (2021)Cite this article

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The Original Article was published on 30 April 2021

replying to: Dandan Wen et al. Nature Photonics https://doi.org/10.1038/s41566-021-00806-x (2021).

We acknowledge the Matters Arising article by Wen et al.1, where they query the reciprocity action of the metasurface in our heuristic example given in the main text of our article2. The reciprocity argument is valid for metasurfaces based on geometric phase, but we agree that it does not hold for metasurfaces based on propagation phase. In general, a J-plate can exhibit both types of phase3. As such, we agree that the required Gaussian-like beam from the crystal cannot be attributed to reciprocity. We would like to use this Reply to correct this inaccuracy as well as similar analogies in the Supplementary Information of our article, which are likewise true only for geometric phase J-plates.

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Fig. 1: Fundamental and second-harmonic laser cavities.

Data availability

The data that support the findings of this study are available from the corresponding author upon reasonable request.

References

  1. Wen, D., Cadusch, J. J., Fang, Z. & Crozier, K. B. Reconsidering metasurface lasers. Nat. Photon. https://doi.org/10.1038/s41566-021-00806-x (2021).

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Acknowledgements

We thank T. Omatsu for useful discussions.

Author information

Authors and Affiliations

  1. School of Physics, University of the Witwatersrand, Wits, South Africa

    Hend Sroor, Bereneice Sephton, Darryl Naidoo & Andrew Forbes

  2. Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA

    Yao-Wei Huang, Vincent Ginis & Federico Capasso

  3. Department of Electrical and Computer Engineering, National University of Singapore, Singapore, Singapore

    Yao-Wei Huang & Cheng-Wei Qiu

  4. CSIR National Laser Centre, Pretoria, South Africa

    Darryl Naidoo

  5. Molecular Chirality Research Center, Chiba University, Inageku, Chiba, Japan

    Adam Vallés

  6. Applied Physics, Vrije Universiteit Brussel, Brussels, Belgium

    Vincent Ginis

  7. CNST - Fondazione Istituto Italiano di Tecnologia Via Giovanni Pascoli, Milan, Italy

    Antonio Ambrosio

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  1. Hend Sroor
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Contributions

H.R. and D.N. performed the additional experiment, with all authors contributing to the writing of the article.

Corresponding author

Correspondence to Andrew Forbes.

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Sroor, H., Huang, YW., Sephton, B. et al. Reply to: Reconsidering metasurface lasers. Nat. Photonics 15, 339–340 (2021). https://doi.org/10.1038/s41566-021-00808-9

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