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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. et al.

In: Physical Review B, Vol. 99, No. 8, 085302, 01.02.2019.

Research output: Contribution to journal › Article › peer-review

Harvard

Sumida, K, Ishida, Y, Yoshikawa, T, Chen, J, Nurmamat, M, Kokh, KA, Tereshchenko, OE, Shin, S & Kimura, A 2019, 'Inverted Dirac-electron population for broadband lasing in a thermally activated p-type topological insulator', Physical Review B, vol. 99, no. 8, 085302. https://doi.org/10.1103/PhysRevB.99.085302

APA

Sumida, K., Ishida, Y., Yoshikawa, T., Chen, J., Nurmamat, M., Kokh, K. A., Tereshchenko, O. E., Shin, S., & Kimura, A. (2019). Inverted Dirac-electron population for broadband lasing in a thermally activated p-type topological insulator. Physical Review B, 99(8), [085302]. https://doi.org/10.1103/PhysRevB.99.085302

Vancouver

Sumida K, Ishida Y, Yoshikawa T, Chen J, Nurmamat M, Kokh KA et al. Inverted Dirac-electron population for broadband lasing in a thermally activated p-type topological insulator. Physical Review B. 2019 Feb 1;99(8):085302. doi: 10.1103/PhysRevB.99.085302

Author

Sumida, K. ; Ishida, Y. ; Yoshikawa, T. et al. / Inverted Dirac-electron population for broadband lasing in a thermally activated p-type topological insulator. In: Physical Review B. 2019 ; Vol. 99, No. 8.

BibTeX

@article{c1475a84d87e4e968459e1330624e49c,
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.",
keywords = "GRAPHENE PHOTONICS, CRYSTALS, DYNAMICS",
author = "K. Sumida and Y. Ishida and T. Yoshikawa and J. Chen and M. Nurmamat and Kokh, {K. A.} and Tereshchenko, {O. E.} and S. Shin and A. Kimura",
year = "2019",
month = feb,
day = "1",
doi = "10.1103/PhysRevB.99.085302",
language = "English",
volume = "99",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "8",

}

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 - 2019/2/1

Y1 - 2019/2/1

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.

KW - GRAPHENE PHOTONICS

KW - CRYSTALS

KW - DYNAMICS

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

AN - SCOPUS:85061425317

VL - 99

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 8

M1 - 085302

ER -

ID: 18562932