Publications in peer-reviewed journals

2021

• [26] Yifan Zhu, Liyun Cao, Aurélien Merkel, Shi-Wang Fan, Brice Vincent and Badreddine Assouar. Janus acoustic metascreen with nonreciprocal and reconfigurable phase modulations Nature Communications 12 (2021) 7089. [doi]
• [25] Côme Olivier, Gaëlle Poignand, Matthieu Malléjac, Vicent Romero-Garcia, Guillaume Penelet, Aurélien Merkel, Daniel Torrent, Jensen Li, Johan Christensen and Jean-Philippe Groby. Nonreciprocal and even Willis couplings in periodic thermoacoustic amplifiers Physical Review B 104 (2021) 184109. [doi]
• [23] Krupali Donda, Yifan Zhu, Aurélien Merkel, Shi-Wang Fan, Liyun Cao, Sheng Wang and Badreddine Assouar. Ultrathin acoustic absorbing metasurface based on deep learning approach Smart Materials and Structures 30 (2021) 085003. [doi]
• [24] Jean-Philippe Groby, Matthieu Malléjac, Aurélien Merkel, Vicent Romero-Garcia, Vincent Tournat, Daniel Torrent and Jensen Li. Analytical modeling of one-dimensional resonant asymmetric and reciprocal acoustic structures as Willis materials New Journal of Physics 23 (2021) 053020. [doi]
• [22] Matthieu Malléjac, Aurélien Merkel, Jose Sànchez-Dehesa, Johan Christensen, Vincent Tournat, Vicent Romero-Garcia and Jean-Philippe Groby. Experimental evidence of a hiding zone in a density-near-zero acoustic metamaterial Journal of Applied Physics 129 (2021) 145101. [doi]
• [21] Yifan Zhu, Aurélien Merkel, Krupali Donda, Shi-Wang Fan, Liyun Cao and Badreddine Assouar. Nonlocal acoustic metasurface for ultrabroadband sound absorption Physical Review B 103 (2021) 054102. [doi]

2020

• [20] V. Romero-Garcia, N. Jiménez, G. Theocharis, V. Achilleos, A. Merkel, O. Richoux, V. Tournat, J.-P. Groby and V. Pagneux. Design of acoustic metamaterials made of Helmholtz resonators for perfect absorption by using the complex frequency plane Comptes Rendus Physique 21 (2020) 713-749. [doi]
• [19] V. Romero-Garcia, N. Jiménez, J.-P. Groby, A. Merkel, V. Tournat, G. Theocharis, O. Richoux and V. Pagneux. Perfect Absorption in Mirror-Symmetric Acoustic Metascreens Physical Review Applied 14 (2020) 054055. [doi]
• [18] Shi-Wang Fan, Yifan Zhu, Liyun Cao, Yan-Feng Wang, A-Li Chen, Aurélien Merkel, Yue-Sheng Wang and Badreddine Assouar. Broadband tunable lossy metasurface with independent amplitude and phase modulations for acoustic holography Smart Materials and Structures 29 (2020) 105038. [doi]
• [17] M. Malléjac, A. Merkel, V. Tournat, J.-P. Groby and V. Romero-Garcia. Doping of a plate-type acoustic metamaterial Physical Review B Rapid Communication 102 (2020) 060302(R). [doi]
• [16] Yifan Zhu, Liyun Cao, Aurélien Merkel, Shi-Wang Fan and Badreddine Assouar. Bifunctional superlens for simultaneous flexural and acoustic wave superfocusing Applied Physics Letters 116 (2020) 253502. [doi]

2019

• [15] A. Merkel and J. Christensen. Ultrasonic nodal chains in topological granular metamaterials Communications Physics 2 (2019) 154. [doi] (open access)
• [14] M. Malléjac, A. Merkel, J. Sánchez-Dehesa , J. Christensen, V. Tournat, V. Romero-Garcia and J.-P. Groby. Zero-phase propagation in realistic plate- type acoustic metamaterials. Applied Physics Letters 115 (2019) 134101. [doi] Selected as an Editor’s Pick.
• [13] A. Merkel, G. Theocharis, F. Allein, J.-P. Groby, V. Gusev and V. Tournat. Testing a bead-rod contact with a nonlinear resonance method. Journal of Sound and Vibrations 441 (2019) 84--85. [doi]

2018

• [12] M. Rosendo-Lopez, A. Merkel and J. Christensen. PT sonic crystals: From asymmetric echoes to supersonic speeds. EPL (Europhysics Letters) 124 (2018) 34001. [doi]
• [11] A. Merkel, V. Romero-Garcia, J.-P. Groby, Jensen Li and J. Christensen. Unidirectional sonic zero reflection in passive PT-symmetric Willis media. Physical Review B Rapid Communication 98 (2018) 201102(R). [doi] [Arxiv]
• [10] A. Merkel, M. Willatzen and J. Christensen. Dynamic nonreciprocity in loss-compensated piezophononic media. Physical Review Applied 9 (2018) 034033. [doi]

2017

• [9] A. Merkel and S. Luding. Enhanced micropolar model for ordered granular materials. International Journal of Solids and Structure 106–107 (2017) 91–105. [doi] [Arxiv]

2016

• [8] V. Romero-Garcìa, G. Theocharis, O. Richoux, A. Merkel, V. Tournat and V. Pagneux. Perfect and broadband acoustic absorption by critically coupled sub-wavelength resonators. Scientific Reports 6 (2016) 19519. [doi] [Arxiv] (open access)

2015

• [7] A. Merkel, G. Theocharis, V. Romero-Garcìa, O. Richoux and V. Pagneux. Control of acoustic absorption in one-dimensional scattering by resonant scatterers. Applied Physics Letters 107 (2015) 244102. [doi] [Arxiv]

2014

• [6] G. Theocharis, O. Richoux, V. Romero-Garcìa, A. Merkel and V. Tournat. Slow sound propagation in realistic locally resonant acoustic metamaterials. New Journal of Physics 16 (2014) 093017. [doi] (open access)
• [5] A. Merkel, V. Tournat and V. Gusev. Directional asymmetry of the nonlinear wave phenomena in a three-dimensional granular phononic crystal under gravity. Physical Review E 90 (2014) 023206. [doi]

2011

• [4] A. Merkel, V. Tournat and V. Gusev. Experimental evidence of rotational elastic waves in granular phononic crystals. Physical Review Letters 107 (2011) 225502. [doi]
• [3] V. Tournat, I. Pèrez-Arjona, A. Merkel, V. Sanchez-Morcillo and V. Gusev. Out-of-plane elastic waves in phononic monolayer granular membranes. New Journal of Physics 13 (2011) 073042. [doi] (open access)

2010

• [2] A. Merkel, V. Tournat and V. Gusev. Dispersion of elastic waves in three-dimensional phononic granular crystals : properties of rotational modes. Physical Review E 82 (2010) 031305. [doi]
• [1] A. Merkel, V. Tournat and V. Gusev. Elastic waves in noncohesive frictionless granular crystals. Ultrasonics 50 (2010) 133–138. [doi]

PhD thesis

Theoretical and experimental study of the acoustic wave propagation in three-dimensional granular phononic crystals.
Manuscript available here (half in french, half in english).