Nonlinear Optics
The nonlinear optics research in the institute for Optical and Electronic Materials is concentrated on using the second order hyperpolarisability (c(2)) present in specifically engineered organic nonlinear optic (ONLO) materials. The arising electro-optic effect is inherently fast, because it originates from the pure electronic displacement polarization of conjugated ¿-electrons, resulting in a very high bandwidth (> 100 GHz). Additionally these organic materials can be engineered to exhibit very high electro-optic coefficients (> 300 pm/V), which are ten times larger than inorganic materials (e.g. LiNbO). These characteristics make ONLO materials interesting for microphotonic applications to realize ultrafast electro-optic modulators, tunable filters and switches. EO-tunable devices using ONLO materials are either realized by defining the devices directly in the ONLO material or by functionalizing silicon microphotonic devices using ONLO materials. Both paths are perused at our institute. Tunable photonic band gap resonators in ONLO material have been successfully demonstrated. Furthermore the combination of ONLOs with silicon-on-insulator (SOI) allows the realization low voltage and high frequency electro-optical modulators based on microphotonic resonators (ring resonator or photonic crystal cavity) or slow light photonic crystal Mach-Zehnder interferometers, with very small geometric footprint (on the scale of square µm). Infiltration of the low index material into slotted waveguides leads to an evanescent field enhancement in the slot and therefore a strong interaction of the optical field with the modulating electric field. Additionally, due to the narrow slot (width ~100 nm) relatively high electric field strengths are achieved, even if the applied external voltage is comparatively low (~1 V), which allows highly energy efficient electro-optic modulation. Wissenschaftliche Kontakte und Kooperationen - Prof. Dr. A. K.-Y. Jen, University of Washington, Materials Science and Engineering
- Prof. Dr. R. Zentel, Universität Mainz, Organische Chemie
- Dr. W. Volksen, IBM Almaden Research Center
Publikationen - 4-09.071V
C. Liguda, G. Böttger, A. Kuligk, R. Blum, M. Eich, "Polymer photonic crystal slab waveguides", Appl. Phys. Lett. 78, 17 (2001). - 4-09.084V
G. Böttger, C. Liguda, M. Schmidt, M. Eich, "Improved transmission characteristics of moderate refractive index contrast photonic crystal slabs", Appl. Phys. Lett. 81, 14 (2002). - 4-09.093V
M. Schmidt, G. Boettger, M. Eich, W. Morgenroth, U. Huebner, R. Boucher, H. G. Meyer, D. Konjhodzic, H. Bretinger, and F. Marlow, "Ultralow refractive index substrates¿a base for photonic crystal slab waveguides", Appl. Phys. Lett. Band 85 (2004). - 4-09.095V
M. Schmidt, C. Liguda, G. Boettger, M. Eich, H. G. Meyer, U. Huebner, W. Morgenroth, and F. Marlow, "UV-trimming of two dimensional polymer photonic crystals", Journal of Nonlinear Optical Physics & Materials Band 13 Seite 535 (2004). - 4-09.102V
R. Boucher, U. Hübner, W. Morgenroth, H. Roth, M. Schmidt and M. Eich, "Etching of sub-micron high aspect ratio holes in oxides and polymers", Microelec. Engin. Band 73 Seite 330 (2004). - 4-09.111V
M. Schmidt, M. Eich, U. Huebner,R. Boucher, "Electro-optically tunable photonic crystals", Applied Physics Letters 87, 12, 121110, (2005) - 4-09.114V
D. Konjhodzic, H. Bretinger, U. Wilczok, A. Dreier, A. Ladenburger, M. Schmidt, M. Eich,F. Marlow, "Low-n mesoporous silica films: structure and properties", Applied Physics A-materials Science & Processing 81, 2, 425¿432, (2005) - 4-09.118V
G. Bottger, M. Schmidt, M. Eich, R. Boucher,U. Hubner, "Photonic crystal all-polymer slab resonators", Journal of Applied Physics 98, 10, 103101, (2005) - 4-09.124V
U. Huebner, R. Boucher, W. Morgenroth, M. Schmidt,M. Eich, "Fabrication of photonic crystal structures in polymer waveguide material", Microelectronic Engineering 83, 4-9, 1138¿1141, (2006) - 4-09.128V
J. H. Wulbern, M. Schmidt, U. Hubner, R. Boucher, W. Volksen, Y. Lu, R. Zentel,M. Eich, "Polymer based tunable photonic crystals", Physica Status Solidi A - Applications and Materials Science 204, 11, 3739¿3753, (2007) - 4-09.137V
J. H. Wülbern, A. Petrov,M. Eich, "Electro-optical modulator in a polymerinfiltrated silicon slotted photonic crystal waveguide heterostructure resonator", Optics Express 17, 1, 304¿313, (2009)
Stichwörter - Electro-Optics
- NLO Polymers
- Nonlinear Optics
- Pockels-Effect
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