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Supervisor's Foreword; Parts of this thesis have been published in the following journal articles:; Acknowledgments; Contents; Abbreviations; Symbols; List of Figures; List of Tables; 1 Introduction; 1.1 Reshaping Wavefronts in Optics and Acoustics; 1.2 Vibrational Direction in Fluids and Solids; 1.3 Acoustic Focusing and Piezoelectric Transducer; 1.4 Invisibility Cloaking in Optics and Acoustics; 1.5 Outlines of Chaps.2
5; References; 2 Manipulating Acoustic Wavefront with Metasurface of Inhomogeneous Impedance; 2.1 Extraordinary Reflection and Ordinary Reflection
2.2 Continuous and Discontinuous Impedance2.3 Acoustic Illusion and Ipsilateral Focusing; 2.4 Conversion from Propagating to Surface Waves; 2.5 Methods; 2.6 Conclusion and Discussion; References; 3 Redirecting Acoustic Waves Out of the Incident Plane; 3.1 Out-of-incident-plane Vibration of Fluid Particles; 3.2 Two-Dimensional Varying Metasurface; 3.3 Three-Dimensional Control of Extraordinary Reflection; 3.4 Conclusion; References; 4 Manipulating Acoustic Focus with an Active Metasurface Piezoelectric Transducer; 4.1 Design of Planar Metasurface Piezoelectric Transducer
4.2 Generation of an Acoustic Focal Needle4.3 Generation of Acoustic Far-Field Multiple Foci; 4.4 Acoustic Super-Oscillatory Super Resolution; 4.5 Discussion; 4.6 Conclusion; References; 5 Realizing Acoustic Cloaking and Near-Zero Density with Acoustic Metastructure; 5.1 Metastructure for Acoustic Cloaking Made by Copper; 5.2 Spring-Mass Model and Density-Near-Zero Property; 5.3 Coupling Model and Geometrical Dependence; 5.4 Deploying Cloaked Area in Free Space and in Waveguides; 5.5 Conclusion and Discussion; References; 6 Future Work; 6.1 Manipulation of Band Gap for Sound Transmission
6.2 Manipulation of Acoustic Properties in Stratified FluidsReferences; Appendix A Detailed Derivation of Impedance-Governed Generalized Snell's Law of Reflection (IGSL) in Acoustics; Appendix B Distinction of IGSL in Acoustics; Appendix C Parameters of Metasurface Piezoelectric Transducer; Appendix D Details of the Simulation for Internal Waves
5; References; 2 Manipulating Acoustic Wavefront with Metasurface of Inhomogeneous Impedance; 2.1 Extraordinary Reflection and Ordinary Reflection
2.2 Continuous and Discontinuous Impedance2.3 Acoustic Illusion and Ipsilateral Focusing; 2.4 Conversion from Propagating to Surface Waves; 2.5 Methods; 2.6 Conclusion and Discussion; References; 3 Redirecting Acoustic Waves Out of the Incident Plane; 3.1 Out-of-incident-plane Vibration of Fluid Particles; 3.2 Two-Dimensional Varying Metasurface; 3.3 Three-Dimensional Control of Extraordinary Reflection; 3.4 Conclusion; References; 4 Manipulating Acoustic Focus with an Active Metasurface Piezoelectric Transducer; 4.1 Design of Planar Metasurface Piezoelectric Transducer
4.2 Generation of an Acoustic Focal Needle4.3 Generation of Acoustic Far-Field Multiple Foci; 4.4 Acoustic Super-Oscillatory Super Resolution; 4.5 Discussion; 4.6 Conclusion; References; 5 Realizing Acoustic Cloaking and Near-Zero Density with Acoustic Metastructure; 5.1 Metastructure for Acoustic Cloaking Made by Copper; 5.2 Spring-Mass Model and Density-Near-Zero Property; 5.3 Coupling Model and Geometrical Dependence; 5.4 Deploying Cloaked Area in Free Space and in Waveguides; 5.5 Conclusion and Discussion; References; 6 Future Work; 6.1 Manipulation of Band Gap for Sound Transmission
6.2 Manipulation of Acoustic Properties in Stratified FluidsReferences; Appendix A Detailed Derivation of Impedance-Governed Generalized Snell's Law of Reflection (IGSL) in Acoustics; Appendix B Distinction of IGSL in Acoustics; Appendix C Parameters of Metasurface Piezoelectric Transducer; Appendix D Details of the Simulation for Internal Waves