Inverted Dirac-electron population for broadband lasing in a thermally activated p-type topological insulator

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Inverted Dirac-electron population for broadband lasing in a thermally activated p-type topological insulator. / Sumida, K.; Ishida, Y.; Yoshikawa, T.; Chen, J.; Nurmamat, M.; Kokh, K.A.; Tereshchenko, O.E.; Shin, S.; Kimura, A.

в: Physical Review B - Condensed Matter and Materials Physics, Том 99, 085302, 2019.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

Author

Sumida, K. ; Ishida, Y. ; Yoshikawa, T. ; Chen, J. ; Nurmamat, M. ; Kokh, K.A. ; Tereshchenko, O.E. ; Shin, S. ; Kimura, A. / Inverted Dirac-electron population for broadband lasing in a thermally activated p-type topological insulator. в: Physical Review B - Condensed Matter and Materials Physics. 2019 ; Том 99.

BibTeX

@article{5074cf60aee744c9bf443e2daba85e95,

title = "Inverted Dirac-electron population for broadband lasing in a thermally activated p-type topological insulator",

abstract = "Maintaining a population inversion in electron distributions is the first step towards lasing. There is a strong interest in realizing the inversion in a Dirac conical band structure, because broad-band lasing may then be realized owing to the zero-gap nature of the Dirac cone. Here we show that the population inversion can be elongated to >7 ps at 8 K and >10 ps at 300 K on the surface of a p-type topological insulator (Sb0.73Bi0.27)2Te3. Time-and angle-resolved photoemission spectroscopy gives us the direct evidence for the elongated duration of the inversion in the topological surface states. We hereby provide a guideline to prolong the population inversion at finite temperatures. Our study strengthens the route toward the Dirac materials to be a lasing medium.",

author = "K. Sumida and Y. Ishida and T. Yoshikawa and J. Chen and M. Nurmamat and K.A. Kokh and O.E. Tereshchenko and S. Shin and A. Kimura",

year = "2019",

doi = "10.1103/PhysRevB.99.085302",

language = "English",

volume = "99",

journal = "Physical Review B-Condensed Matter",

issn = "1098-0121",

publisher = "American Physical Society",

}

RIS

TY - JOUR

T1 - Inverted Dirac-electron population for broadband lasing in a thermally activated p-type topological insulator

AU - Sumida, K.

AU - Ishida, Y.

AU - Yoshikawa, T.

AU - Chen, J.

AU - Nurmamat, M.

AU - Kokh, K.A.

AU - Tereshchenko, O.E.

AU - Shin, S.

AU - Kimura, A.

PY - 2019

Y1 - 2019

N2 - Maintaining a population inversion in electron distributions is the first step towards lasing. There is a strong interest in realizing the inversion in a Dirac conical band structure, because broad-band lasing may then be realized owing to the zero-gap nature of the Dirac cone. Here we show that the population inversion can be elongated to >7 ps at 8 K and >10 ps at 300 K on the surface of a p-type topological insulator (Sb0.73Bi0.27)2Te3. Time-and angle-resolved photoemission spectroscopy gives us the direct evidence for the elongated duration of the inversion in the topological surface states. We hereby provide a guideline to prolong the population inversion at finite temperatures. Our study strengthens the route toward the Dirac materials to be a lasing medium.

AB - Maintaining a population inversion in electron distributions is the first step towards lasing. There is a strong interest in realizing the inversion in a Dirac conical band structure, because broad-band lasing may then be realized owing to the zero-gap nature of the Dirac cone. Here we show that the population inversion can be elongated to >7 ps at 8 K and >10 ps at 300 K on the surface of a p-type topological insulator (Sb0.73Bi0.27)2Te3. Time-and angle-resolved photoemission spectroscopy gives us the direct evidence for the elongated duration of the inversion in the topological surface states. We hereby provide a guideline to prolong the population inversion at finite temperatures. Our study strengthens the route toward the Dirac materials to be a lasing medium.

UR - http://www.scopus.com/inward/record.url?scp=85061425317&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.99.085302

DO - 10.1103/PhysRevB.99.085302

M3 - Article

VL - 99

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

M1 - 085302

ER -

ID: 49492857