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Isomeric photonic molecules formed from coupled microresonators.
G Guttroff1, M Bayer, A Forchel
1Technische Physik, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany.
Summary
Researchers explored photonic molecules with four connected cavities in various geometric arrangements. The study found that the optical mode spectrum and energies strongly depend on the molecule
Area of Science:
- Photonics
- Molecular physics
- Optical spectroscopy
Background:
- Photonic molecules offer a platform for controlling light at the nanoscale.
- Understanding the relationship between molecular geometry and optical properties is crucial for designing novel photonic devices.
Purpose of the Study:
- To investigate the formation and optical properties of isomeric photonic molecules.
- To explore the influence of molecular geometry on three-dimensionally confined photonic states.
Main Methods:
- Fabrication of photonic molecules by connecting four identical optical cavities in chain, square, and T-shaped geometries.
- Characterization of the optical mode spectrum using photoluminescence spectroscopy.
- Theoretical calculations of electromagnetic fields within the cavity structures.
Main Results:
- Successful formation of isomeric photonic molecules in distinct geometric configurations.
- Observation of three-dimensionally confined photonic states within the molecular structures.
- Demonstration that optical mode energies are highly sensitive to the specific geometry of the photonic molecule.
Conclusions:
- The geometry of photonic molecules significantly dictates their optical mode spectrum and energies.
- Experimental findings align well with theoretical predictions, validating the computational models.
- This work provides insights into the design principles for tailored photonic systems.