Infrared-spectroscopic, dynamic near-field microscopy of living cells and nanoparticles in water

Autor: Korbinian J. Kaltenecker, Thorsten Gölz, Enrico Bau, Fritz Keilmann

Publikováno v: Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)

Abstract Infrared fingerprint spectra can reveal the chemical nature of materials down to 20-nm detail, far below the diffraction limit, when probed by scattering-type scanning near-field optical microscopy (s-SNOM). But this was impossible with livi

Externí odkaz: https://doaj.org/article/b8303eac027c4aaba15f72b7d6e69052

Mono-crystalline gold platelets: a high-quality platform for surface plasmon polaritons

Autor: Mathias Geisler, Korbinian J. Kaltenecker, Peter Uhd Jepsen, Enno Krauss, Bert Hecht, N. Asger Mortensen, Laura Casses, Nicolas Stenger

Publikováno v: Nanophotonics, Vol 9, Iss 2, Pp 509-522 (2020)
Kaltenecker, K J, Krauss, E, Casses, L N N F, Geisler, M, Hecht, B, Mortensen, N A, Jepsen, P U & Stenger, N 2020, ' Mono-crystalline gold platelets: A high-quality platform for surface plasmon polaritons ', Nanophotonics, vol. 9, no. 2, pp. 509-522 . https://doi.org/10.1515/nanoph-2019-0362
Kaltenecker, K J, Krauss, E, Casses, L, Geisler, M, Hecht, B, Mortensen, N A, Jepsen, P U & Stenger, N 2020, ' Mono-crystalline gold platelets : a high-quality platform for surface plasmon polaritons ', Nanophotonics, vol. 9, no. 2, pp. 509-522 . https://doi.org/10.1515/nanoph-2019-0362

We use mono-crystalline gold platelets with ultra-smooth surfaces and superior plasmonic properties to investigate the formation of interference patterns caused by surface plasmon polaritons (SPPs) with scattering-type scanning near-field microscopy

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f1483cafc5fe2bc0c2bb86e13493ed0
https://doaj.org/article/b683115a40054aa4ba361c14840074ff

In-vivo nano-scale infrared imaging and spectroscopy of cells in liquid environment

Autor: Yasin C. Durmaz, Thorsten Goelz, Korbinian J. Kaltenecker, Fritz Keilmann

Publikováno v: 2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz).

We report a breakthrough in observing living cells with infrared s-SNOM (scattering near-field microscope).(1, 2) To keep cells "happy" it is mandatory to avoid evaporation, oxygen attack, and mechanical distortion. We reported at IRMMW-THz 2019 that

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::70834085b328fe700a0b899b2b4374bd
https://doi.org/10.1109/irmmw-thz50926.2021.9567012

Subcycle Nonlinear Response of Doped 4H Silicon Carbide Revealed by Two-Dimensional Terahertz Spectroscopy

Autor: Haiyan Ou, Peter Uhd Jepsen, Pernille Klarskov, Korbinian J. Kaltenecker, Krzysztof Iwaszczuk, Kion Norrman, Abebe Tilahun Tarekegne, Weifang Lu

Publikováno v: Tarekegne, A T, Kaltenecker, K J, Klarskov, P, Iwaszczuk, K, Lu, W, Ou, H, Norrman, K & Jepsen, P U 2020, ' Subcycle Nonlinear Response of Doped 4 H Silicon Carbide Revealed by Two-Dimensional Terahertz Spectroscopy ', ACS Photonics, vol. 7, no. 1, pp. 221-231 . https://doi.org/10.1021/acsphotonics.9b01462
Tarekegne, A T, Kaltenecker, K J, Klarskov, P, Iwaszczuk, K, Lu, W, Ou, H, Norrman, K & Jepsen, P U 2019, ' Subcycle Nonlinear Response of Doped 4H Silicon Carbide Revealed by Two-Dimensional Terahertz Spectroscopy ', ACS Photonics, vol. 7, no. 1, pp. 221-231 . https://doi.org/10.1021/acsphotonics.9b01462

We investigate single-cycle terahertz (THz) field-induced nonlinear absorption in doped silicon carbide. We find that the nonlinear response is ultrafast, and we observe up to 20% reduction of transmission of single THz pulses at peak field strengths

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::47b939b2fc61e21eb1ed07fc16cd195c
https://doi.org/10.1021/acsphotonics.9b01462

MHz-repetition-rate, sub-mW, multi-octave THz wave generation in HMQ-TMS

Autor: Peter Uhd Jepsen, Seung-Heon Lee, Fabian Rotermund, O-Pil Kwon, Mojca Jazbinsek, Tobias Olaf Buchmann, Korbinian J. Kaltenecker, Edmund J. R. Kelleher, Binbin Zhou

Publikováno v: Buchmann, T O, Kelleher, E J R, Kaltenecker, K J, Zhou, B, Lee, S H, Kwon, O P, Jazbinsek, M, Rotermund, F & Jepsen, P U 2020, ' MHz-repetition-rate, sub-mW, multi-octave THz wave generation in HMQ-TMS ', Optics Express, vol. 28, no. 7, pp. 9631-9641 . https://doi.org/10.1364/OE.386604

We demonstrate the first megahertz (MHz) repetition-rate, broadband terahertz (THz) source based on optical rectification in the organic crystal HMQ-TMS driven by a femtosecond Yb:fibre laser. Pumping at 1035 nm with 30 fs pulses, we achieve few-cycl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d353ab72477437dea2a81661e5377fe0
https://hdl.handle.net/11475/21556