Solid-State Color Centers for Single-Photon Generation
, Vincenzo Bonaiuto 7,8, Simone Cammarata 3,9, Matteo Campostrini 10, Thu Ha Dao 7,8, Fabio De Matteis 7,8, Valeria Demontis 6,11, Giovanni Di Giuseppe 12,13, Sviatoslav Ditalia Tchernij 2,14, Simone Donati 3,15, Andrea Fontana 6, Jacopo Forneris 2,14, Roberto Francini 7,8, Luca Frontini 4,16, Roberto Gunnella 12,13, Simone Iadanza 17, Ali Emre Kaplan 18, Cosimo Lacava 6,19, Francesco Marzioni 12,13,20, Paolo Piergentili 12,13, Paolo Prosposito 7,8, Carlo Roncolato 10, Andrea Salamon 8, Matteo Salvato 8,22, Fausto Sargeni 8,23, Jafar Shojaii 24, Alessandra Toncelli 3,15, Gabriella Trucco 6,25 and add
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Round 1
Reviewer 1 Report
Comments and Suggestions for AuthorsIn this review, the authors give an overview over the current state-of-the-art in research on color centers in a wide range of materials as possible single photon sources. The review is very timely, it is well written and I recommend publication after some minor issues have been addressed:
p. 1 l. 55: There seems to be something missing in "with significant subsequent leading to their practical implementation"
p. 1 l. 86: What does "most promising materials" mean, i.e. most promising according to which criterion?
p. 4 The abbreviation "HBT" used in the figure caption should be properly introduced in the main text.
Author Response
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Author Response File: 
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Reviewer 2 Report
Comments and Suggestions for AuthorsThe manuscript represents one of the first attempts at a review that describes solid state color centers for single-photon generation in several different materials. The text of the manuscript is based on current articles up to 2023 publication and correctly describes the main trends in the research of solid state color centers for single-photon generation. However, in my opinion, this manuscript needs to be improved.
The figures are excessively small in size and all of them are placed in the text 1-2 pages later than they are referenced in the text. The drawings themselves are practically not discussed in the text of the review.
The manuscript contains virtually no description of desired properties of solid state color centers for single-photon generation. It would be advisable to state them clearly at the beginning of the manuscript.
The manuscript does not contain Tables containing information on the parameters of solid state color centers for single-photon generation in the materials discussed. Such tables are traditionally present in other similar reviews and greatly facilitate understanding of the general state of affairs in this area of research.
The manuscript is overly laconic. For example, only half a page of text is devoted to the properties of color centers for single-photon generation in hexagonal boron nitride. At the same time, the volume of similar reviews on this material (DOI 10.1088/1361-6633/ab6310; https://opg.optica.org/col/abstract.cfm?URI=col-20-3-032701) amounts to 20 pages of text and more. It would be correct to either supplement the text of the manuscript or at least list these reviews at the References.
There is no mention in the manuscript of highly selective formation of color centers for single-photon generation in the volume of diamond by intense laser radiation.
The review also does not reflect numerous publications on single-photon electroluminescence in diamond (see for example, 10.1063/1.3670332; 10.1038/nphoton.2012.75; 10.1002/qute.202100048).
Some of the comments are wishes to the numerous authors of this manuscript to improve its content to the level which will be corresponding to the Materials.
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
