Substrate-emitting ring interband cascade lasers

Martin Holzbauer; Rolf Szedlak; Hermann Detz; Robert Weih; Sven Höfling; Werner Schrenk; Johannes Koeth; Gottfried Strasser

doi:10.1063/1.4989514

Substrate-emitting ring interband cascade lasers

Martin Holzbauer, Rolf Szedlak, Hermann Detz, Robert Weih, Sven Höfling, Werner Schrenk, Johannes Koeth, Gottfried Strasser

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

Abstract

We demonstrate interband cascade lasers fabricated into ring-shaped cavities with vertical light emission through the substrate at a wavelength of λ ≈ 3.7 µm. The out-coupling mechanism is based on a metallized second-order distributed feedback grating. At room-temperature, a pulsed threshold current-density of 0.75 kA/cm² and a temperature-tuning rate of 0.3 nm/°C is measured. In contrast to the azimuthal polarization of ring quantum cascade lasers, we observe a radial polarization of the projected nearfield of ring interband cascade lasers. These findings underline the fundamental physical difference between light generation in interband and intersubband cascade lasers, offering new perspectives for device integration.

Original language	English
Article number	171101
Number of pages	4
Journal	Applied Physics Letters
Volume	111
Issue number	17
DOIs	https://doi.org/10.1063/1.4989514
Publication status	Published - 26 Oct 2017

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title = "Substrate-emitting ring interband cascade lasers",

abstract = "We demonstrate interband cascade lasers fabricated into ring-shaped cavities with vertical light emission through the substrate at a wavelength of λ ≈ 3.7 µm. The out-coupling mechanism is based on a metallized second-order distributed feedback grating. At room-temperature, a pulsed threshold current-density of 0.75 kA/cm2 and a temperature-tuning rate of 0.3 nm/°C is measured. In contrast to the azimuthal polarization of ring quantum cascade lasers, we observe a radial polarization of the projected nearfield of ring interband cascade lasers. These findings underline the fundamental physical difference between light generation in interband and intersubband cascade lasers, offering new perspectives for device integration.",

author = "Martin Holzbauer and Rolf Szedlak and Hermann Detz and Robert Weih and Sven H{\"o}fling and Werner Schrenk and Johannes Koeth and Gottfried Strasser",

note = "The authors acknowledge the support by the Austrian Science Fund (FWF) projects P26100-N27 (H2N) and NextLite (F4909-N23), and the State of Bavaria. HD acknowledges financial support through an APART fellowship from the Austrian Academy of Sciences.",

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day = "26",

doi = "10.1063/1.4989514",

language = "English",

volume = "111",

journal = "Applied Physics Letters",

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T1 - Substrate-emitting ring interband cascade lasers

AU - Holzbauer, Martin

AU - Szedlak, Rolf

AU - Detz, Hermann

AU - Weih, Robert

AU - Höfling, Sven

AU - Schrenk, Werner

AU - Koeth, Johannes

AU - Strasser, Gottfried

N1 - The authors acknowledge the support by the Austrian Science Fund (FWF) projects P26100-N27 (H2N) and NextLite (F4909-N23), and the State of Bavaria. HD acknowledges financial support through an APART fellowship from the Austrian Academy of Sciences.

PY - 2017/10/26

Y1 - 2017/10/26

N2 - We demonstrate interband cascade lasers fabricated into ring-shaped cavities with vertical light emission through the substrate at a wavelength of λ ≈ 3.7 µm. The out-coupling mechanism is based on a metallized second-order distributed feedback grating. At room-temperature, a pulsed threshold current-density of 0.75 kA/cm2 and a temperature-tuning rate of 0.3 nm/°C is measured. In contrast to the azimuthal polarization of ring quantum cascade lasers, we observe a radial polarization of the projected nearfield of ring interband cascade lasers. These findings underline the fundamental physical difference between light generation in interband and intersubband cascade lasers, offering new perspectives for device integration.

AB - We demonstrate interband cascade lasers fabricated into ring-shaped cavities with vertical light emission through the substrate at a wavelength of λ ≈ 3.7 µm. The out-coupling mechanism is based on a metallized second-order distributed feedback grating. At room-temperature, a pulsed threshold current-density of 0.75 kA/cm2 and a temperature-tuning rate of 0.3 nm/°C is measured. In contrast to the azimuthal polarization of ring quantum cascade lasers, we observe a radial polarization of the projected nearfield of ring interband cascade lasers. These findings underline the fundamental physical difference between light generation in interband and intersubband cascade lasers, offering new perspectives for device integration.

U2 - 10.1063/1.4989514

DO - 10.1063/1.4989514

M3 - Article

SN - 0003-6951

VL - 111

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 17

M1 - 171101

ER -

Substrate-emitting ring interband cascade lasers

Abstract

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