Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Quantum beats of exciton-polarons in CsPbI3 perovskite nanocrystals. / Трифонов, Артур Валерьевич; Nestoklon, M. O.; Hollberg, M. A.; Grisard, Stefan; Kudlacik, D.; Колобкова, Елена; Кузнецова, Мария Сергеевна; Goupalov, Serguei; Kaspari, J. M.; Reiter, D. E.; Яковлев, Д.Р.; Bayer, Manfred; Akimov, I.A.
в: Nature Communications, Том 17, 4685, 26.05.2026.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Quantum beats of exciton-polarons in CsPbI3 perovskite nanocrystals
AU - Трифонов, Артур Валерьевич
AU - Nestoklon, M. O.
AU - Hollberg, M. A.
AU - Grisard, Stefan
AU - Kudlacik, D.
AU - Колобкова, Елена
AU - Кузнецова, Мария Сергеевна
AU - Goupalov, Serguei
AU - Kaspari, J. M.
AU - Reiter, D. E.
AU - Яковлев, Д.Р.
AU - Bayer, Manfred
AU - Akimov, I.A.
PY - 2026/5/26
Y1 - 2026/5/26
N2 - The optical response of semiconductors is governed by coupled electronic and vibrational excitations. In lead-halide perovskite nanocrystals, strong exciton-phonon interaction forms a ladder of exciton-polaron states accessible by femtosecond laser pulses. We demonstrate a fully coherent regime of exciton-polaron dynamics with long optical coherence times (T 2 ≈ 300 ps) in CsPbI 3 nanocrystals embedded in glass. Using transient two-pulse photon echo at a temperature of 2 K, we observe quantum beats between exciton-polaron states, with decay determined by optical phonon lifetimes of 5-15 ps. Within a four-level model, we directly quantify the exciton-phonon coupling strength through Huang-Rhys factors of 0.05 - 0.12 and 0.02 - 0.04 for low-energy optical phonons with energies of 3.2 and 5.1 meV, respectively. The pronounced size dependence of both coupling strengths and phonon lifetimes offers a route to tune the optical transitions between exciton-polaron states and tailor the coherent optical dynamics in perovskite semiconductors for solid-state quantum technologies.
AB - The optical response of semiconductors is governed by coupled electronic and vibrational excitations. In lead-halide perovskite nanocrystals, strong exciton-phonon interaction forms a ladder of exciton-polaron states accessible by femtosecond laser pulses. We demonstrate a fully coherent regime of exciton-polaron dynamics with long optical coherence times (T 2 ≈ 300 ps) in CsPbI 3 nanocrystals embedded in glass. Using transient two-pulse photon echo at a temperature of 2 K, we observe quantum beats between exciton-polaron states, with decay determined by optical phonon lifetimes of 5-15 ps. Within a four-level model, we directly quantify the exciton-phonon coupling strength through Huang-Rhys factors of 0.05 - 0.12 and 0.02 - 0.04 for low-energy optical phonons with energies of 3.2 and 5.1 meV, respectively. The pronounced size dependence of both coupling strengths and phonon lifetimes offers a route to tune the optical transitions between exciton-polaron states and tailor the coherent optical dynamics in perovskite semiconductors for solid-state quantum technologies.
UR - http://arxiv.org/abs/2510.14695
UR - https://www.mendeley.com/catalogue/9b10cd2a-98d2-34d1-a089-109d745a2d0f/
U2 - 10.1038/s41467-026-73506-1
DO - 10.1038/s41467-026-73506-1
M3 - Article
C2 - 42192106
VL - 17
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
M1 - 4685
ER -
ID: 154711751