Collector breakdown in the heterojunction bipolar transistor laser

G. Walter, A. James, N. Holonyak, M. Feng, R. Chan

Research output: Contribution to journalArticlepeer-review


Data are presented on a quantum-well (QW)-based InGaPGaAsInGaAs (QW) heterojunction bipolar transistor laser modified with external (increased) mirror reflection yielding lower threshold current (IB =23→19 mA) and higher collector breakdown voltage (2.5 V). Increased breakdown at lower currents is observed on the collector I-V characteristics, at constant base current IB, as a slope change, a corner, and a narrow-line to broadband spectral shift from stimulated (high coherent optical field) to spontaneous (lower incoherent field) operation, a consequence of quenching or reducing photon-assisted tunneling (Franz-Keldysh effect) under the constraint IE + IB + IC =0 as α→1 (αΔ IC Δ IE).

Original languageEnglish (US)
Article number232105
JournalApplied Physics Letters
Issue number23
StatePublished - Jun 5 2006

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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