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Volumn 86, Issue 11, 2005, Pages 1-3

Measurement of subband electronic temperatures and population inversion in THz quantum-cascade lasers

Author keywords

[No Author keywords available]

Indexed keywords

ELECTRON-IMPURITY; ELECTRONIC TEMPERATURE; POPULATION INVERSION; QUANTUM-CASCADE LASERS (QCL);

EID: 17944381347     PISSN: 00036951     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.1886266     Document Type: Article
Times cited : (141)

References (23)
  • 4
    • 17944368347 scopus 로고    scopus 로고
    • Q. Hu, B. S. Williams, S. Kumar, H. Callebaut, S. Kohen, and J. L. Reno (unpublished)
    • Q. Hu, B. S. Williams, S. Kumar, H. Callebaut, S. Kohen, and J. L. Reno (unpublished).
  • 15
    • 17944382636 scopus 로고    scopus 로고
    • note
    • 0.15Gao.85 active region grown by molecular-beam epitaxy on a semi-insulating GaAs substrate. The samples were processed into metal-metal waveguide structures using either Cu-Cu (Sample a), or In-Au (Samples b and c) wafer bonding techniques. Ridge waveguides were defined using photolithography and reactive ion etching. Sample a was 40 μm wide and 0.72 mm long, Sample b was 80 μm wide and 0.82 mm long, and Sample c was 100 μm wide and 1.09 mm long.
  • 17
    • 17944365192 scopus 로고    scopus 로고
    • note
    • + laser was focused to a 2.5 μm spot onto the laser front facet.
  • 20
    • 17944371341 scopus 로고    scopus 로고
    • note
    • -3. These limits have been calculated using the values 1-2 ns and 5-7 μm for the carrier lifetime and the diffusion length, respectively.
  • 21
    • 17944371136 scopus 로고    scopus 로고
    • note
    • 2)=0.4-0.5) in the whole range of investigated powers and thus demonstrates that the electron-LO phonon interaction efficiently depletes the subband 7=3.
  • 22
    • 17944373868 scopus 로고    scopus 로고
    • note
    • The thermal resistance of Devices b and c are A=18.6 K/W and R = 18.0 K/W. These values are 2.5-3.5 times larger than in mid-lR QCLs, due to the thicker active layers used for THz QCLs.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.