Exploration of Angle-Dependent Klein Tunneling in Snowflake-Shaped AlN Thin Film Phononic Crystals

ORAL

Abstract

This study focuses on design fabrication of snowflake-shaped Aluminum Nitride (AlN) thin film phononic crystals. In the suspended configuration, these structures exhibit the Klein Tunneling effect, allowing reflection-free wave transmission. Notably, the interdigital transducer's angle modulates the angle-dependency of this effect. Employing the impedance-matching microscope (TMIM) for detailed analysis, we deciphered the phononic behavior influenced by the Klein Tunneling phenomenon. Our findings spotlight the potential of snowflake-shaped AlN phononic crystals in advanced wave manipulation applications.

* NSF Division of Materials Research Award DMR-2004536 and the Electrical, Communications, and Cyber Systems Award ECCS-2221822.NSF through the Center for Dynamics and Control of Materials, an NSF Materials Research Science and Engineering Center (MRSEC) under Cooperative Agreement DMR-1720595Welch Foundation Grant F-1814

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Publication: pdf

Presenters

  • Yue Jiang

    University of Pennsylvania

Authors

  • Yue Jiang

    University of Pennsylvania

  • Daehun Lee

    University of Texas at Austin

  • Xiaoru Zhang

    University of Texas at Austin

  • Shahin Jahanbani

    University of Texas at Austin

  • Chengyu Wen

    University of Pennsylvania, University of Pensylvania

  • Qicheng Zhang

    University of Pennsylvania

  • A T Charlie C Johnson

    University of Pennsylvania

  • Keji Lai

    University of Texas at Austin