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  1. Article ; Online: Nonlinear refraction in CH

    Kriso, Christian / Stein, Markus / Haeger, Tobias / Pourdavoud, Neda / Gerhard, Marina / Rahimi-Iman, Arash / Riedl, Thomas / Koch, Martin

    Optics letters

    2020  Volume 45, Issue 8, Page(s) 2431–2434

    Abstract: We measure both nonlinear absorption and nonlinear refraction in a ${{\rm CH}_3}{{\rm NH}_3}{{\rm PbBr}_3}$ ... ...

    Abstract We measure both nonlinear absorption and nonlinear refraction in a ${{\rm CH}_3}{{\rm NH}_3}{{\rm PbBr}_3}$CH
    Language English
    Publishing date 2020-04-14
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4794
    ISSN (online) 1539-4794
    DOI 10.1364/OL.383917
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Microcavity-enhanced Kerr nonlinearity in a vertical-external-cavity surface-emitting laser: erratum.

    Kriso, Christian / Kress, Sascha / Munshi, Tasnim / Grossmann, Marius / Bek, Roman / Jetter, Michael / Michler, Peter / Stolz, Wolfgang / Koch, Martin / Rahimi-Iman, Arash

    Optics express

    2021  Volume 29, Issue 15, Page(s) 23290–23291

    Abstract: We correct a mistake in [Opt. Express27, 11914 (2019)10.1364/OE.27.011914] when calculating the focal length of the Kerr lens with the measured values of the nonlinear refractive index n2 and parameters of a prototypical self-mode-locking VECSEL cavity. ... ...

    Abstract We correct a mistake in [Opt. Express27, 11914 (2019)10.1364/OE.27.011914] when calculating the focal length of the Kerr lens with the measured values of the nonlinear refractive index n2 and parameters of a prototypical self-mode-locking VECSEL cavity. We therefore update Fig. 1 of the original publication. The new calculation yields a significantly larger value of the Kerr lens focal length leading to a smaller perturbation of the cavity beam profile.
    Language English
    Publishing date 2021-09-23
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.435077
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Two-chip power-scalable THz-generating semiconductor disk laser.

    Guoyu, Heyang / Kriso, Christian / Zhang, Fan / Wichmann, Matthias / Stolz, Wolfgang / Fedorova, Ksenia A / Rahimi-Iman, Arash

    Optics letters

    2019  Volume 44, Issue 16, Page(s) 4000–4003

    Abstract: We demonstrate a compact two-chip terahertz-emitting vertical-external-cavity surface-emitting laser source, which provides 1 THz output based on intracavity frequency conversion of dual-wavelength emission in a periodically poled lithium niobate crystal. ...

    Abstract We demonstrate a compact two-chip terahertz-emitting vertical-external-cavity surface-emitting laser source, which provides 1 THz output based on intracavity frequency conversion of dual-wavelength emission in a periodically poled lithium niobate crystal. The type-I frequency conversion scheme at room temperature highly benefits from the power-scaling possibilities in a multi-chip cavity with intracavity powers in excess of 500 W.
    Language English
    Publishing date 2019-08-15
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4794
    ISSN (online) 1539-4794
    DOI 10.1364/OL.44.004000
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Book ; Online: Nonlinear refraction in CH$_3$NH$_3$PbBr$_3$ single crystals

    Kriso, Christian / Stein, Markus / Haeger, Tobias / Pourdavoud, Neda / Gerhard, Marina / Rahimi-Iman, Arash / Riedl, Thomas / Koch, Martin

    2019  

    Abstract: Hybrid lead halide perovskites, such as CH$_3$NH$_3$PbX$_3$ (X=I, Br), are direct gap semiconductors that offer many superior optoelectronic properties combined with extremely simple solution-processing fabrication methods. This makes them very ... ...

    Abstract Hybrid lead halide perovskites, such as CH$_3$NH$_3$PbX$_3$ (X=I, Br), are direct gap semiconductors that offer many superior optoelectronic properties combined with extremely simple solution-processing fabrication methods. This makes them very attractive for use in applications like solar cells or light-emitting devices. Recently, also their nonlinear optical properties have received increased attention due to reports of high nonlinear refraction in thin films and nanoparticles. However, understanding of the underlying mechanisms is poor and limited by the lack of knowledge of fundamental parameters like the nonlinear refractive index of the bulk material. Here, we measure both nonlinear absorption and nonlinear refraction in a CH$_3$NH$_3$PbBr$_3$ single crystal using the Z-scan technique with femtosecond laser pulses. At 1000 nm, we obtain values of 5.2 cm/GW and 9.5$\cdot$10$^{-14}$ cm$^2$/W for nonlinear absorption and nonlinear refraction, respectively. Sign and magnitude of the observed refractive nonlinearity are reproduced well by the two-band model. To our knowledge, these measurements mark the first characterization of nonlinear refraction in any metal halide perovskite single crystal and thus will serve as an important reference for assessing the potential of this emerging material class for nonlinear optical applications.
    Keywords Physics - Optics ; Condensed Matter - Materials Science
    Subject code 535
    Publishing date 2019-10-28
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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  5. Article ; Online: Microcavity-enhanced Kerr nonlinearity in a vertical-external-cavity surface-emitting laser.

    Kriso, Christian / Kress, Sascha / Munshi, Tasnim / Grossmann, Marius / Bek, Roman / Jetter, Michael / Michler, Peter / Stolz, Wolfgang / Koch, Martin / Rahimi-Iman, Arash

    Optics express

    2019  Volume 27, Issue 9, Page(s) 11914–11929

    Abstract: Self-mode-locking has become an emerging path to the generation of ultrashort pulses with vertical-external-cavity surface-emitting lasers. In our work, a strong Kerr nonlinearity that is so far assumed to give rise to mode-locked operation is evidenced ... ...

    Abstract Self-mode-locking has become an emerging path to the generation of ultrashort pulses with vertical-external-cavity surface-emitting lasers. In our work, a strong Kerr nonlinearity that is so far assumed to give rise to mode-locked operation is evidenced and a strong nonlinearity enhancement by the microcavity is revealed. We present wavelength-dependent measurements of the nonlinear absorption and nonlinear refractive index change in a gain chip using the Z-scan technique. We report negative nonlinear refraction up to 5x10
    Language English
    Publishing date 2019-05-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.27.011914
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

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