SciPost Submission Page
Tunable second harmonic generation in 2D materials: comparison of different strategies
by Simone Grillo, Elena Cannuccia, Maurizia Palummo, Olivia Pulci, Claudio Attaccalite
This Submission thread is now published as
Submission summary
| Authors (as registered SciPost users): | Claudio Attaccalite |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202410_00031v2 (pdf) |
| Date accepted: | 2024-11-19 |
| Date submitted: | 2024-11-07 13:59 |
| Submitted by: | Attaccalite, Claudio |
| Submitted to: | SciPost Physics Core |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
|
| Approaches: | Theoretical, Computational |
Abstract
Nonlinear optical frequency conversion, where optical fields interact with a non-linear medium to generate new frequencies, is a key phenomenon in modern photonic systems. However, a major challenge with these techniques lies on the difficulty of tuning the nonlinear electrical susceptibilities that drive such effects in a given material. As a result, dynamic control of optical nonlinearities has remained largely confined to research laboratories, limiting its practical use as a spectroscopic tool. In this work, we aim to advance the development of devices with tunable nonlinear responses by exploring two potential mechanisms for electrically manipulating second-order optical nonlinearity in two-dimensional materials. Specifically, we consider two configurations: in the first, the material does not inherently exhibit second-harmonic generation (SHG), but this response is induced by an external field; in the second, an external field induces doping in a material that already exhibits SHG, altering the intensity of the nonlinear signal. In this work, we have studied these two configurations using a real-time ab-initio approach under an out-of-plane external field and including the effects of doping-induced variations in the screened electron-electron interaction. We then discuss the limitations of current computational methods and compare our results with experimental measurements.
Author comments upon resubmission
Thank you for sending us the two referee reports.
In this new version of the manuscript, we have responded to all of the referee's comments and remarks,
and to the additional comment on our publication.
All changes to the manuscript are highlighted in red.
We hope that the manuscript is now suitable for publication on SciPost Core
with best regards
Claudio Attaccalite
List of changes
Here is the list of changes to our manuscript:
1) We have added DOI for all references
2) We have corrected names in reference titles
3) We have added a new reference to an analytical model: Ref. 32
4) We have commented on the k derivative in Eq. 1 and its relation to the Berry connection.
5) A discussion of the A excitonic peak in WSe2 has been added with a new citation: Ref. 33
6) We have revised the abstract according to the comment on our manuscript.
Published as SciPost Phys. Core 7, 081 (2024)
Reports on this Submission
Report
I am quite satisfied with the revisions made by the authors. The only point that remains unclear is the x-axis in Fig. 3: I am still convinced that there should be "Photon energy \omega (eV)" rather than "2\omega".
Requested changes
Correct the x-axis of Fig. 3
Recommendation
Publish (meets expectations and criteria for this Journal)
Author: Claudio Attaccalite on 2024-11-08 [id 4949]
(in reply to Report 1 on 2024-11-08)We thank the referee for this point, he/she is right, the caption of the figure is wrong . We will fix it by changing 2\omega in \omega.