Aluminum alloys 1 Aluminum nitride 1 Complementary switchable 1 Dual modes 1 Electromechanical coupling 1 End-systems 1 Esters 1 Ferroelectric behavior Ferroelectricity 1 Lamb wave resonators 1 Lamb-wave resonators 1 Nitrides 1 Periodic poling 1 Radio frequency front end 1 Reconfigurable 1 Resonators 1 Scandium–aluminum nitride 1 Surface waves 1 Switchable 1 Ultrasonic waves 1 Wave propagation 1 complementary switchable 1 ferroelectric 1 scandium–aluminum nitride 1