Circular Grating Resonators as Small Mode-Volume Microcavities for Switching
| Autor: | Thorsten Wahlbrink, Sophie Schönenberger, Rainer F. Mahrt, Tobias Plötzing, Vahid Sandoghdar, Nikolaj Moll, Thilo Stöferle, Bert Jan Offrein, Michael Först, Michael Waldow, Stephan Götzinger, Jens Bolten |
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| Rok vydání: | 2009 |
| Předmět: |
Mode volume
Materials science business.industry Transducers Reproducibility of Results Physics::Optics Signal Processing Computer-Assisted Equipment Design Grating Coupled mode theory Sensitivity and Specificity Atomic and Molecular Physics and Optics law.invention Equipment Failure Analysis Refractometry Resonator Semiconductor Optics law Optical cavity Picosecond Optoelectronics Charge carrier business |
| Zdroj: | Optics Express. 17:5953 |
| ISSN: | 1094-4087 |
| DOI: | 10.1364/oe.17.005953 |
| Popis: | We demonstrate the suitability of microcavities based on circular grating resonators (CGRs) as fast switches. This type of optical resonator is characterized by a high quality factor and very small mode volume. The waveguide-coupled CGRs are fabricated with silicon-on-insulator technology compatible with standard complementary metal-oxide semiconductor (CMOS) processing. The linear optical properties of the CGRs are investigated by transmission spectroscopy. From 3D finite-difference time-domain simulations of isolated CGRs, we identify the measured resonances. We probe the spatial distribution and the parasitic losses of a resonant optical mode with scanning near-field optical microscopy. We observe fast all-optical switching within a few picoseconds by optically generating free charge carriers within the cavity. |
| Databáze: | OpenAIRE |
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