= Bo Monemar
{c}
{tag=Physicist}
A <physicist> who measured the fundamental <band gap> of <gallium nitride> using photoluminescence excitation. When suitable transmission samples were unavailable, varying the excitation and observing emission provided another route to the absorption edge. Combining those measurements with reflection and luminescence separated <exciton> transition energies from the underlying <band gap>.<Fundamental energy gap of GaN from photoluminescence excitation spectra by Bo Monemar>[Abstract: motivation for excitation spectroscopy and combined determination of exciton transitions and band gap]{ref}
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