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[Physics] Smaller than Planck Length and Radiation?

Is it possible to put enough energy into a particle so that it radiates radiation with a wavelength smaller than the Planck length? I've been taught that there is nothing "shorter" than the Planck length but also that there is no limit on the amount of energy a particle can have and that energy is proportional to a shorter wavelength.
gpt
Where were you taught there is nothing shorter than the Planck length?

Anyway, any given electromagnetic wave can have a wavelength shorter than the Planck length in the right reference frame. Something moving very very close to the speed of light relative to the emitting source could see that.

However, nothing is known to exist that would emit a photon with that much energy, as seen in the reference frame of the emitter. It would have be some sort of quantum gravitational system like a charged micro black holes. A black hole with a mass close to the Planck mass would give off radiation with a wavelength around the Planck length.