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Optomechanical interactions in two-dimensional Si and GaAs phoXonic cavities
S El-Jallal1, M Oudich, Y Pennec
1IEMN, UMR CNRS 8520, UFR de Physique, Université de Lille1, Villeneuve d'Ascq, France. Faculté des Sciences, Physique du Rayonnement et l'Interaction Laser Matière, Université Moulay Ismail, Meknès, Morocco.
Journal of Physics. Condensed Matter : an Institute of Physics Journal
|November 27, 2013
Summary
We explored optomechanical interactions in 2D photonic crystals made of silicon and gallium arsenide. Our findings reveal how material properties and wavelength influence light-matter interactions for potential device applications.
Area of Science:
- Photonics
- Materials Science
- Quantum Optics
Background:
- Optomechanical interactions are crucial for developing novel photonic devices.
- Photonic crystals offer unique platforms for controlling light-matter interactions.
- Understanding optomechanics in semiconductor materials is key for integrated photonics.
Purpose of the Study:
- To theoretically investigate optomechanical coupling in 2D photonic crystals.
- To analyze the contributions of photoelastic effect and interface deformation to optomechanical coupling.
- To explore the influence of material properties (Si, GaAs) and optical wavelength on coupling strength.
Main Methods:
- Theoretical modeling of optomechanical interactions in 2D photonic crystals.
- Cavity creation by removing a single hole in a perfect crystal lattice.
- Calculation of coupling strength using photonic mode frequency modulation and optomechanical coupling rate.
- Analysis of mode symmetry and degeneracy effects on interaction efficiency.
Main Results:
- Identified two primary mechanisms for optomechanical coupling: bulk photoelastic effect and acoustic strain-induced interface deformation.
- Quantified coupling strength using two distinct methods, confirming theoretical predictions.
- Demonstrated the wavelength and material dependence of the photoelastic contribution, particularly near the semiconductor band gap.
- Highlighted the role of mode symmetry and degeneracy in efficient optomechanical interaction.
Conclusions:
- Optomechanical coupling in 2D photonic crystals is tunable via material choice and wavelength.
- The photoelastic effect plays a significant role, especially near the band gap.
- Understanding these interactions is essential for designing advanced optomechanical devices.
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