Ultrasonic transducer, and ultrasonic wave generating apparatus and ultrasonic system including the same

摘要

An ultrasonic transducer, and an ultrasonic wave generating apparatus and an ultrasonic system including the same. The ultrasonic transducer includes a light-absorbing layer configured to absorb light incident on the light-absorbing layer and to generate heat based on the absorbed light; and a thermoelastic layer which is disposed on the light-absorbing layer and which is configured to thermally expand based on the heat to generate ultrasonic waves.

主权项

1. An ultrasonic transducer comprising:
a light-absorbing layer configured to absorb light incident on the light-absorbing layer and to generate heat based on the absorbed light; and a thermoelastic layer which is disposed on the light-absorbing layer, the thermoelastic layer being formed of a material different from a material of the light-absorbing layer, the thermoelastic layer being configured to thermally expand based on the heat to generate ultrasonic waves, wherein an absorption coefficient of the light-absorbing layer is higher than an absorption coefficient of the thermoelastic layer, wherein a reflection coefficient of the light-absorbing layer is lower than a reflection coefficient of the thermoelastic layer, and wherein the light-absorbing layer comprises graphene.