VARIABLE WAVELENGTH LIGHT SOURCE

摘要

If an external force is exerted on a plastic photonic crystal by a piezoelectric device (3), the photonic crystal (2) deforms and the photonic band gap easily varies. As the photonic band gap varies, the passage of light of specific wavelength is limited. As a result, light of desired wavelength is sufficiently varied and outputted from the photonic crystal (2), and the light is taken out from an output window (6) to the outside. The scale of the variable wavelength light source is small since a plastic photonic crystal (2) for varying wavelength sufficiently even though the crystal is small is used and the light source and photonic crystal are accommodated in a unit.