Electro-optic modulator including composite materials and testing apparatus including the same

A testing apparatus comprising:

• a light source;
• an electro-optic modulator including a cholesteric liquid crystal (CLC) polymer reflection film disposed over a testing target object, wherein an intensity of reflected light from the electro-optic modulator varies with a voltage distribution of the testing target object;
• a beam splitter configured to transmit or reflect light;
• a first optical system configured to transfer light emitted by the light source to the beam splitter;
• and
• a second optical system configured to transfer light output from the beam splitter to the electro-optic modulator and transfer the reflected light for the electro-optic modulator to the beam splitter, wherein the electro-optic modulator comprises:
• a composite material layer on the reflection film and including a polymer film and a plurality of liquid crystal (LC) droplets;
• and
• a transparent electrode layer on a top surface of the composite material layer,
• wherein an aligned state of LC molecules in the droplets varies with a bias voltage applied between the transparent electrode layer and the testing target object and the voltage distribution of the testing target object.

An electro-optic modulator comprising:

• a polymer film including liquid crystal (LC) droplets in the polymer film;
• a transparent electrode layer on an upper surface of the polymer film;
• and
• a cholesteric liquid crystal (CLC) polymer reflection film on a lower surface of the polymer film opposite the transparent electrode layer wherein the CLC polymer reflection film is configured for wireless electrical coupling to a target testing object that is spaced apart from the CLC polymer reflection film by a gap.