英和和英

名詞

supercollimation (usually uncountable, plural supercollimations)

1. (physics) The focusing of radiation into a finite-width beam that shows very little diffraction.
   • 2016, Alexander Cerjan, Aaswath Raman, Shanhui Fan, “Exceptional contours and band structure design in parity-time symmetric photonic crystals”, in arXiv‎:

     In photonic crystals, such thresholdless ${\\\\displaystyle {\\\\mathcal {PT}}}$ transitions are shown to yield significant control over the band structure of the system, and can result in all-angle supercollimation, a ${\\\\displaystyle {\\\\mathcal {PT}}}$-superprism effect, and unidirectional behavior..