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Broadband-Enhanced Transmission through Symmetric Diffusive Slabs.
Élie Chéron1, Simon Félix1, Vincent Pagneux1
1Laboratoire d'Acoustique de l'Université du Mans, LAUM, CNRS UMR 6613, Le Mans Université, avenue Olivier Messiaen, 72085 Le Mans, France.
We found that placing opaque barriers between disordered slabs significantly enhances wave transmission. The enhancement is optimal at specific slab lengths and increases with barrier strength, showing potential for wave-based sensing applications.
Area of Science:
- Wave physics
- Condensed matter physics
- Optics
Background:
- Opaque barriers typically block wave transmission.
- Disordered systems exhibit complex wave propagation phenomena.
- Controlling wave transmission through barriers is crucial for various applications.
Purpose of the Study:
- To investigate the enhancement of wave transmission through an opaque barrier.
- To explore the role of diffusive disordered slabs in modifying transmission.
- To understand the relationship between barrier properties, slab characteristics, and transmission enhancement.
Main Methods:
- Experimental setup involving symmetric diffusive disordered slabs and an opaque barrier.
- Analysis of transmission eigenvalues and their distribution.
- Development of a simple model to quantify parameter scalings.
Main Results:
- Observed significant and broadband transmission enhancement through the opaque barrier.
- Transmission enhancement showed a bimodal distribution of eigenvalues.
- An optimal slab length was found for a given barrier transmittance.
- Maximum enhancement scaled directly with barrier strength.
Conclusions:
- Diffusive disordered slabs can dramatically enhance transmission through opaque barriers.
- The phenomenon is tunable via slab length and barrier strength.
- The system's sensitivity to symmetry defects suggests potential for wave-based sensing applications.
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