Mr. Zhenkun Lin Profile

Zhenkun Lin

SPIE Involvement:

Author

Publications (2)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 28 April 2023 Presentation

Origami-inspired reconfigurable elastic metasurfaces

Zhenkun Lin, Serife Tol

Proceedings Volume PC12483, PC1248301 (2023) https://doi.org/10.1117/12.2657980

KEYWORDS: Wavefronts, Phase shift keying, Phase modulation

Read Abstract +

We propose a reconfigurable elastic metasurface composed of an array of zigzag-base folded sheets with parallel corrugations to control the wavefront of the refracted flexural wave. The desired phase gradient is achieved by tailoring the folding angle of sheets and the thickness of each metasurface unit. By exploiting the dynamic properties of zigzag-base folded sheets, the reconfigurable metasurface can achieve different wavefront functions depending on the folding angle. We present a wave-focusing metasurface that can localize the flexural wave in the transmitted region at different values of the folding angle. In addition, the refracted wave can be steered in different directions by only folding the metasurface.

Proceedings Article | 20 April 2022 Presentation + Paper

Nonlinear acoustic metasurface for simultaneous higher-harmonic generation and demultiplexing

Zhenkun Lin, Yuning Zhang, Kon-Well Wang, Serife Tol

Proceedings Volume 12043, 1204315 (2022) https://doi.org/10.1117/12.2612932

KEYWORDS: Acoustics, Second-harmonic generation, Wavefronts, Wave propagation, Phase shifts, Waveguides, Phase modulation, Phase shift keying, Finite element methods, Nonlinear metamaterials

Read Abstract +

Recently, acoustic/elastic metasurfaces have gained increasing research interests due to their ability to control waves with compact and lightweight structures. A metasurface is a thin layer in the host medium composed of an array of subwavelength-scaled patterns, which introduces an abrupt phase shift in the wave propagation path and tailors wavefront based on generalized Snell’s law. The existing metasurfaces mainly depend on the linear dynamic behavior of the structures, while their nonlinear features have not been studied extensively. A couple recent attempts have shown means of introducing nonlinearity in acoustic metasurface designs, resulting in nonlinear effects such as second-harmonic generation (SHG). However, these studies mainly focus on generating and maximizing the higher-order harmonics, while the phase modulation and wavefront tailoring capability are less explored. Our study advances the state of the art and proposes a novel acoustic metasurface design with locally resonant nonlinear elements in the form of curved beams. We explore the nonlinear phenomenon, specifically SHG, of the proposed system using both analytical and numerical frameworks. Our results show that the proposed nonlinear metasurface can achieve SHG in the transmitted acoustic wavefield, and simultaneously demultiplex for different frequency components (i.e., split the second-harmonic component from the fundamental frequency component) by steering them into different directions. This study presents new theoretical and numerical platforms to explore the amplitude-dependent behavior of acoustic metasurfaces, expands their wavefront tailoring capabilities and functionalities, and develops new potentials towards efficient technologies to manipulate acoustic waves.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years