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Evanescent Field Based Photoacoustics: Optical Property Evaluation at Surfaces

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Published on: July 26, 2016

Analogue transformations in physics and their application to acoustics.

C García-Meca¹, S Carloni, C Barceló

¹Nanophotonics Technology Center, Universitat Politècnica de València, 46022 Valencia, Spain.

Scientific Reports

|June 19, 2013

Summary

Scientists developed a new analogue spacetime method to control waves across physics fields, enabling novel acoustic devices like spacetime cloaks. This approach overcomes limitations of traditional transformation techniques for broader applications.

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Area of Science:

Electromagnetics and wave physics
Acoustics
Condensed matter physics

Background:

Transformation optics enables devices like invisibility cloaks.
Standard transformation techniques face constraints in applying to other physics fields due to field equation structures.

Purpose of the Study:

To develop a general transformation method applicable beyond electromagnetics.
To establish a new paradigm for controlling waves in diverse physical systems.
To create an "analogue transformation acoustics" formalism.

Main Methods:

Utilizing the concept of analogue spacetimes.
Developing a complete transformation method.
Deriving an analogue transformation acoustics formalism.

Main Results:

A general transformation method is established, extending wave control possibilities.
The analogue transformation acoustics formalism allows space-time mixing and moving fluid transformations.
Explicit designs for a dynamic compressor, acoustic spacetime cloak, and moving aircraft carpet cloak are presented.

Conclusions:

The analogue spacetime method offers a powerful new paradigm for wave control in various physics branches.
This approach overcomes previous limitations, enabling previously impossible wave manipulation techniques.
The developed formalism has potential applications in acoustics, quantum fluids, and graphene electronics.