Publikationsliste des Fachgebietes Theoretische Physik 2

Anzahl der Treffer: 223
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Kim, Ji-Hwan; Kang, Sung Bum; Yu, Hyeon-Hye; Kim, Jaewon; Ryu, Jinhyeok; Lee, Ji-Won; Choi, Kyoung Jin; Kim, Chil-Min; Yi, Chang-Hwan
Augmentation of absorption channels induced by wave-chaos effects in free-standing nanowire arrays. - In: Optics express, ISSN 1094-4087, Bd. 28 (2020), 16, S. 23569-23583

Plenty of issues on quantal features in chaotic systems have been raised since chaos was accepted as one of the intrinsic properties of nature. Through intensive studies, it was revealed that resonance spectra in chaotic systems exhibit complicated structures, which is deeply concerned with sophisticated resonance dynamics. Motivated by these phenomena, we investigate light absorption characteristics of chaotic nanowires in an array. According to our results, a chaotic cross-section of a nanowire induces a remarkable augmentation of absorption channels, that is, an increasing number of absorption modes leads to substantial light absorption enhancement, as the deformation of cross-section increases. We experimentally demonstrate the light absorption enhancement with free-standing Si-nanowire polydimethylsiloxane (PDMS) composites. Our results are applicable not only to transparent solar cells but also to complementary metal-oxide-semiconductor (CMOS) image sensors to maximize absorption efficiency.



https://doi.org/10.1364/OE.398687
Luhn, Sebastian; Hentschel, Martina
Analytical Fresnel laws for curved dielectric interfaces. - In: Journal of optics, ISSN 2040-8986, Volume 22 (2020), number 1, 015605, Seite 1-6

https://doi.org/10.1088/2040-8986/ab5c42
Hentschel, Martina;
Quantenchaos. - In: Vielfältige Physik, (2019), S. 253-262

https://doi.org/10.1007/978-3-662-58035-6_23
Ryu, Jinhyeok; Gwak, Sunjae; Kim, Jaewon; Yu, Hyeon-Hye; Kim, Ji-Hwan; Lee, Ji-Won; Yi, Chang-Hwan; Kim, Chil-Min
Hybridization of different types of exceptional points. - In: Photonics research, ISSN 2327-9125, Bd. 7 (2019), 12, S. 1473-1478

https://doi.org/10.1364/PRJ.7.001473
Bosch, Martí; Malzard, Simon; Hentschel, Martina; Schomerus, Henning
Non-Hermitian defect states from lifetime differences. - In: Physical review, ISSN 2469-9934, Bd. 100 (2019), 6, 063801, insges. 8 S.

https://doi.org/10.1103/PhysRevA.100.063801
Kreismann, Jakob; Kim, Jaewon; Bosch, Martí; Hein, Matthias; Sinzinger, Stefan; Hentschel, Martina
Superdirectional light emission and emission reversal from microcavity arrays. - In: Physical review research, ISSN 2643-1564, Bd. 1 (2019), 3, S. 033171-1-033171-5

Optical microdisk cavities with certain asymmetric shapes are known to possess unidirectional far-field emission properties. Here, we investigate arrays of these dielectric microresonators with respect to their emission properties resulting from the coherent behavior of the coupled constituents. This approach is inspired by electronic mesoscopic physics where the additional interference effects are known to enhance the properties of the individual system. As an example, we study the linear arrangement of nominally identical Lima¸con-shaped cavities and find mostly an increase of the portion of directional emitted light while its angular spread is largely diminished from 20 deg for the single cavity to about 3 deg for a linear array of 10 Lima¸con resonators, in fair agreement with a simple array model. Moreover, by varying the intercavity distance, we observe windows of reversion of the emission directionality and superdirectionality that can be interesting for applications like optical sensing or interconnects. We introduce a generalized array factor model that takes the coupling into account.



https://doi.org/10.1103/PhysRevResearch.1.033171
Behrens, Arne; Feßer, Patrick; Kreismann, Jakob; Hentschel, Martina; Sinzinger, Stefan
Mesoskopische Flüstergaleriemodenresonatoren im sichtbaren Spektrum auf Basis von Silizium Mikrostrukturierung. - In: MikroSystemTechnik Kongress 2019, (2019), S. 178-181

Behrens, Arne; Hentschel, Martina; Sinzinger, Stefan
Untersuchung deformierter optischer Mikrokavitäten anhand des abgestrahlten Fernfelds. - In: DGaO-Proceedings, ISSN 1614-8436, Bd. 120 (2019), B17, insges. 2 S.

https://nbn-resolving.org/urn:nbn:de:0287-2019-B017-3
Kreismann, Jakob; Hentschel, Martina; Behrens, Arne; Sinzinger, Stefan
Super-directional light emission from arrays of deformed microcavities. - In: DPG-Frühjahrstagung 2019 (DPG Spring Meeting 2019) of the Condensed Matter Section (SKM) together with the Division Radiation and Medical Physics and the Working Groups Equal Opportunities, Industry and Business, Young DPG; Symposia, exhibition of scientific instruments and literature, (2019), KFM 4.10

Kreismann, Jakob; Hentschel, Martina
The optical Möbius strip cavity: tailoring geometric phases and far fields. - In: DPG-Frühjahrstagung 2019 (DPG Spring Meeting 2019) of the Condensed Matter Section (SKM) together with the Division Radiation and Medical Physics and the Working Groups Equal Opportunities, Industry and Business, Young DPG; Symposia, exhibition of scientific instruments and literature, (2019), KFM 4.9