[{"page":"620-624","type":"journal_article","date_created":"2023-08-09T13:07:51Z","extern":"1","article_type":"original","intvolume":"        16","citation":{"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.","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>","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>.","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.","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.","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>","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>."},"_id":"13991","date_published":"2022-09-01T00:00:00Z","publication":"Nature Photonics","author":[{"full_name":"Heide, Christian","first_name":"Christian","last_name":"Heide"},{"full_name":"Kobayashi, Yuki","first_name":"Yuki","last_name":"Kobayashi"},{"last_name":"Baykusheva","first_name":"Denitsa Rangelova","id":"71b4d059-2a03-11ee-914d-dfa3beed6530","full_name":"Baykusheva, Denitsa Rangelova"},{"first_name":"Deepti","full_name":"Jain, Deepti","last_name":"Jain"},{"last_name":"Sobota","first_name":"Jonathan A.","full_name":"Sobota, Jonathan A."},{"full_name":"Hashimoto, Makoto","first_name":"Makoto","last_name":"Hashimoto"},{"last_name":"Kirchmann","full_name":"Kirchmann, Patrick S.","first_name":"Patrick S."},{"last_name":"Oh","first_name":"Seongshik","full_name":"Oh, Seongshik"},{"full_name":"Heinz, Tony F.","first_name":"Tony F.","last_name":"Heinz"},{"full_name":"Reis, David A.","first_name":"David A.","last_name":"Reis"},{"last_name":"Ghimire","first_name":"Shambhu","full_name":"Ghimire, Shambhu"}],"title":"Probing topological phase transitions using high-harmonic generation","month":"09","doi":"10.1038/s41566-022-01050-7","status":"public","language":[{"iso":"eng"}],"volume":16,"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","quality_controlled":"1","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"}],"scopus_import":"1","oa_version":"None","article_processing_charge":"No","publication_identifier":{"issn":["1749-4885"],"eissn":["1749-4893"]},"date_updated":"2023-08-22T07:20:09Z","year":"2022","keyword":["Atomic and Molecular Physics","and Optics","Electronic","Optical and Magnetic Materials"],"publication_status":"published","issue":"9","publisher":"Springer Nature","day":"01"}]