Magneto-photoluminescent structure of HgCdTe

Photoluminesence(PL) and magneto-optics are classical routines to characterize electronic structures of semiconductors. We incorporated magnetic field with infrared (IR) PL based on a Fourier transform infrared spectrometer, such that thermal background disturbance is well eliminated and signal-to-noise ratio significantly improved. By resolving closely-spaced PL components in Hg_1-xCd_xTe at various magnetic induction intensities, effective masses, shallow level types and energetic positions are deduced. It´s demonstrated that magneto-PL is powerful in resolving IR-PL structure, and able to provide accurate parameters like effective masses and ionization energies of band-edge levels, along with the impurity types.