Electronic device and information processing method

An electronic device, comprising:

• a light detector, including a photonic crystal layer configured to reflect and transmit light with a first wavelength in a first incident light according to a voltage applied to the photonic crystal layer;
• and a photosensitive layer arranged at a light transmission side of the photonic crystal layer and configured to detect a first parameter of a first transmission light transmitted through the photonic crystal layer when the light with the first wavelength is reflected by the photonic crystal layer, and detect a second parameter of a second transmission light transmitted through the photonic crystal layer when the light with the first wavelength is transmitted through the photonic crystal layer;
• and
• a hardware processor configured to form a spectrum of the first waveform according to the first parameter and the second parameter, wherein,
• the first parameter is indicative of an intensity of the first transmission light, and the second parameter is indicative of an intensity of the second transmission light.