[{"publication":"Nature Photonics","date_updated":"2023-08-22T07:20:09Z","intvolume":"        16","volume":16,"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","author":[{"first_name":"Christian","last_name":"Heide","full_name":"Heide, Christian"},{"full_name":"Kobayashi, Yuki","first_name":"Yuki","last_name":"Kobayashi"},{"last_name":"Baykusheva","first_name":"Denitsa Rangelova","full_name":"Baykusheva, Denitsa Rangelova","id":"71b4d059-2a03-11ee-914d-dfa3beed6530"},{"first_name":"Deepti","last_name":"Jain","full_name":"Jain, Deepti"},{"last_name":"Sobota","first_name":"Jonathan A.","full_name":"Sobota, Jonathan A."},{"full_name":"Hashimoto, Makoto","first_name":"Makoto","last_name":"Hashimoto"},{"first_name":"Patrick S.","last_name":"Kirchmann","full_name":"Kirchmann, Patrick S."},{"full_name":"Oh, Seongshik","first_name":"Seongshik","last_name":"Oh"},{"first_name":"Tony F.","last_name":"Heinz","full_name":"Heinz, Tony F."},{"last_name":"Reis","first_name":"David A.","full_name":"Reis, David A."},{"first_name":"Shambhu","last_name":"Ghimire","full_name":"Ghimire, Shambhu"}],"_id":"13991","date_created":"2023-08-09T13:07:51Z","abstract":[{"text":"The prediction and realization of topological insulators have sparked great interest in experimental approaches to the classification of materials1,2,3. The phase transition between non-trivial and trivial topological states is important, not only for basic materials science but also for next-generation technology, such as dissipation-free electronics4. It is therefore crucial to develop advanced probes that are suitable for a wide range of samples and environments. Here we demonstrate that circularly polarized laser-field-driven high-harmonic generation is distinctly sensitive to the non-trivial and trivial topological phases in the prototypical three-dimensional topological insulator bismuth selenide5. The phase transition is chemically initiated by reducing the spin–orbit interaction strength through the substitution of bismuth with indium atoms6,7. We find strikingly different high-harmonic responses of trivial and non-trivial topological surface states that manifest themselves as a conversion efficiency and elliptical dichroism that depend both on the driving laser ellipticity and the crystal orientation. The origins of the anomalous high-harmonic response are corroborated by calculations using the semiconductor optical Bloch equations with pairs of surface and bulk bands. As a purely optical approach, this method offers sensitivity to the electronic structure of the material, including its nonlinear response, and is compatible with a wide range of samples and sample environments.","lang":"eng"}],"year":"2022","citation":{"mla":"Heide, Christian, et al. “Probing Topological Phase Transitions Using High-Harmonic Generation.” <i>Nature Photonics</i>, vol. 16, no. 9, Springer Nature, 2022, pp. 620–24, doi:<a href=\"https://doi.org/10.1038/s41566-022-01050-7\">10.1038/s41566-022-01050-7</a>.","chicago":"Heide, Christian, Yuki Kobayashi, Denitsa Rangelova Baykusheva, Deepti Jain, Jonathan A. Sobota, Makoto Hashimoto, Patrick S. Kirchmann, et al. “Probing Topological Phase Transitions Using High-Harmonic Generation.” <i>Nature Photonics</i>. Springer Nature, 2022. <a href=\"https://doi.org/10.1038/s41566-022-01050-7\">https://doi.org/10.1038/s41566-022-01050-7</a>.","short":"C. Heide, Y. Kobayashi, D.R. Baykusheva, D. Jain, J.A. Sobota, M. Hashimoto, P.S. Kirchmann, S. Oh, T.F. Heinz, D.A. Reis, S. Ghimire, Nature Photonics 16 (2022) 620–624.","apa":"Heide, C., Kobayashi, Y., Baykusheva, D. R., Jain, D., Sobota, J. A., Hashimoto, M., … Ghimire, S. (2022). Probing topological phase transitions using high-harmonic generation. <i>Nature Photonics</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41566-022-01050-7\">https://doi.org/10.1038/s41566-022-01050-7</a>","ama":"Heide C, Kobayashi Y, Baykusheva DR, et al. Probing topological phase transitions using high-harmonic generation. <i>Nature Photonics</i>. 2022;16(9):620-624. doi:<a href=\"https://doi.org/10.1038/s41566-022-01050-7\">10.1038/s41566-022-01050-7</a>","ista":"Heide C, Kobayashi Y, Baykusheva DR, Jain D, Sobota JA, Hashimoto M, Kirchmann PS, Oh S, Heinz TF, Reis DA, Ghimire S. 2022. Probing topological phase transitions using high-harmonic generation. Nature Photonics. 16(9), 620–624.","ieee":"C. Heide <i>et al.</i>, “Probing topological phase transitions using high-harmonic generation,” <i>Nature Photonics</i>, vol. 16, no. 9. Springer Nature, pp. 620–624, 2022."},"article_processing_charge":"No","oa_version":"None","title":"Probing topological phase transitions using high-harmonic generation","publication_status":"published","article_type":"original","publication_identifier":{"issn":["1749-4885"],"eissn":["1749-4893"]},"doi":"10.1038/s41566-022-01050-7","scopus_import":"1","status":"public","month":"09","keyword":["Atomic and Molecular Physics","and Optics","Electronic","Optical and Magnetic Materials"],"extern":"1","language":[{"iso":"eng"}],"date_published":"2022-09-01T00:00:00Z","type":"journal_article","publisher":"Springer Nature","issue":"9","quality_controlled":"1","day":"01","page":"620-624"}]