Research / 2019 / Article / Fig 3

Research Article

Electrically Programmable Terahertz Diatomic Metamolecules for Chiral Optical Control

Figure 3

Experimental modulation of intrinsic chirality. (a) Schematic diagram showing the electromagnetic origin of intrinsic chirality. (b) Reflection digital holographic microscopic profiles of suspended cantilever arm that is attached to anchor with various metal thicknesses () and fixed dielectric layer thickness (). SEM images of microhelices with different cantilever profiles are also shown. (c, d) Experimental CD and ORD spectral responses for different samples at D- and L-conformations. A continuous modulation of intrinsic chirality strength and resonance frequency is observed.