Laser oscillation element

A laser oscillation element comprising:

• a cholesteric liquid crystal layer obtained by cholesteric alignment of a liquid crystal compound,
• wherein in a cross-section of the cholesteric liquid crystal layer observed with a scanning electron microscope, bright portions and dark portions derived from a cholesteric liquid crystalline phase are tilted with respect to a main surface of the cholesteric liquid crystal layer,
• a tilt angle of the bright portions and the dark portions with respect to the main surface of the cholesteric liquid crystal layer is 10° to 90° the cholesteric liquid crystal layer includes a colorant that emits light by excitation,
• the cholesteric liquid crystal layer has a selective reflection wavelength range of a range of λ2 to λ2, and when the liquid crystal compound contained in the cholesteric liquid crystal layer has a refractive index in a major axis direction of ne and a refractive index in a minor axis direction of no, a helical pitch of the cholesteric liquid crystal layer is p, and two band edge wavelengths are λ1=no×p and λ2=ne×p, and
• a luminescence wavelength range of the colorant and at least one of the band edge wavelengths of the cholesteric liquid crystal layer overlap each other.