Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Jalas, Dirk"'
Autor:
Maiwald, Lukas, Lang, Slawa, Jalas, Dirk, Renner, Hagen, Petrov, Alexander Yu., Eich, Manfred
Disordered structures producing a non-iridescent color impression have been shown to feature a spherically shaped Fourier transform of their refractive-index distribution. We determine the direction and efficiency of scattering from thin films made f
Externí odkaz:
http://arxiv.org/abs/1803.01755
Autor:
Shang, Guoliang, Maiwald, Lukas, Renner, Hagen, Jalas, Dirk, Dosta, Maksym, Heinrich, Stefan, Petrov, Alexander Yu., Eich, Manfred
Non-iridescent structural colors based on disordered arrangement of monodisperse spherical particles, also called photonic glass, show low color saturation due to gradual transition in reflectivity. No significant improvement is usually expected from
Externí odkaz:
http://arxiv.org/abs/1802.10536
Autor:
Lang, Slawa, Maiwald, Lukas, Renner, Hagen, Jalas, Dirk, Petrov, Alexander Yu., Eich, Manfred
We present a full vectorial first-order approach to the scattering by arbitrary photonic structures with a low refractive index contrast. Our approach uses the first-order Born approximation and keeps the simple geometrical representation of the Ewal
Externí odkaz:
http://arxiv.org/abs/1802.07058
Publikováno v:
D. Jalas, K. Marvin Schulz, A. Yu. Petrov, and M. Eich, "Emission enhancement in dielectric nanocomposites," Opt. Express 26, 16352-16364 (2018)
We consider emitting nanoparticles in dielectric nanocomposites with varying refractive index contrast and geometry. For that we develop a simple and universal method to calculate the emission enhancement in nanocomposites that employs solely the cal
Externí odkaz:
http://arxiv.org/abs/1710.06833
Autor:
Gaafar, Mahmoud A., Jalas, Dirk, OFaolain, Liam, Li, Juntao, Krauss, Thomas F., Petrov, Alexander Yu., Eich, Manfred
Reflection at relativistically moving plasma mirrors is a well-known approach for frequency conversion as an alternative to nonlinear techniques. A key issue with plasma mirrors is the need for a high carrier concentration, of order 10^21 cm^-3, to a
Externí odkaz:
http://arxiv.org/abs/1705.04808
Autor:
Petrov, Alexander, Jalas, Dirk, Eich, Manfred, Freude, Wolfgang, Fan, Shanhui, Yu, Zongfu, Baets, Roel, Popović, Miloš, Melloni, Andrea, Joannopoulos, John D., Vanwolleghem, Mathias, Doerr, Christopher R., Renner, Hagen
Wang et al. [1] demonstrated different power transmission coefficients for forward and backward propagation in simulation and experiment. From such a demonstration, the central claim of their paper is that "the spatial inversion symmetry breaking dio
Externí odkaz:
http://arxiv.org/abs/1301.7243
Autor:
Petrov, Alexander, Jalas, Dirk, Eich, Manfred, Krause, Michael, Renner, Hagen, Brinkmeyer, Ernst, Doerr, Christopher R.
In the recent article by Feng et al. [Science 333, 729-733 (2011)] a system is proposed with a periodic spatial modulation of refractive index and absorption. It is claimed that this system is nonreciprocal and can be used as an optical isolator. The
Externí odkaz:
http://arxiv.org/abs/1110.5748
Publikováno v:
In Photonics and Nanostructures - Fundamentals and Applications 2011 9(4):351-357
Autor:
Chirumamilla, Manohar, Krishnamurthy, Gnanavel Vaidhyanathan, Knopp, Katrin, Krekeler, Tobias, Graf, Matthias, Jalas, Dirk, Ritter, Martin, St��rmer, Michael, Petrov, Alexander, Eich, Manfred
Publikováno v:
Scientific Reports (9): 7241 (2019-05-10)
Chirumamilla, M, Krishnamurthy, G V, Knopp, K, Krekeler, T, Graf, M, Jalas, D, Ritter, M, Störmer, M, Petrov, A Y & Eich, M 2019, ' Metamaterial emitter for thermophotovoltaics stable up to 1400 °C ', Scientific Reports, vol. 9, no. 1, 7241 . https://doi.org/10.1038/s41598-019-43640-6
Chirumamilla, M, Krishnamurthy, G V, Knopp, K, Krekeler, T, Graf, M, Jalas, D, Ritter, M, Störmer, M, Petrov, A Y & Eich, M 2019, ' Metamaterial emitter for thermophotovoltaics stable up to 1400 °C ', Scientific Reports, vol. 9, no. 1, 7241 . https://doi.org/10.1038/s41598-019-43640-6
High temperature stable selective emitters can significantly increase efficiency and radiative power in thermophotovoltaic (TPV) systems. However, optical properties of structured emitters reported so far degrade at temperatures approaching 1200 °C
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::91dcc0aad60b47baf0395ffcac6a34e7
https://hdl.handle.net/11420/2734
https://hdl.handle.net/11420/2734
Publikováno v:
Cherchi, M, Petrov, A, Jalas, D, Harjanne, M, Aalto, T & Eich, M Feb. 28 2019, Integrated faraday rotator, Patent No. US11506919 .
The invention relates to optical waveguide components, such as Faraday rotators and their manufacture. Faraday rotators based on silicon waveguides (40) are provided, where the waveguide (40) has folded or wound sections (41 a) that are parallel to a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=355e65625b88::5f8e0cc710d6b85c17e4c9f64f1c0183
https://cris.vtt.fi/en/publications/a9410c47-799b-4dc1-a652-ca1df206f9d1
https://cris.vtt.fi/en/publications/a9410c47-799b-4dc1-a652-ca1df206f9d1