Table 1 Mechanical properties of materials selected for the fabrication of Material Contrast lens, as obtained using conventional bulk ultrasonic pulse-echo testing.

From: Lensing in the Ultrasonic Domain using Negative Refraction Induced by Material Contrast

Material

Mechanical Properties

Elastic Modulus

E (GPa)

Density

ρ (kg/m3)

Poisson’s ratio

µ

Aluminium

70

2700

0.34

Molybdenum

324

10240

0.29

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