Light Polarization in Tunnel Junction Injected UV Light‐Emitting Diodes

Jean-Yves Duboz (1) , Victor Fan Arcara (1) , Cynthia Kessaci (1) , Stéphane Vézian (1) , Benjamin Damilano (1)

1 CRHEA - Centre de recherche sur l'hétéroepitaxie et ses applications

The polarization of the light emitted by an ultraviolet light-emitting diode (LED) has a direct impact on the device performance: a transverse electric polarization of the emission is preferred for extraction from the surface of the diode grown along the c axis. While this is the case for most UV LEDs grown on AlN, this state of events could be called into question when a tunnel junction (TJ) is added to make up for the poor p doping in Al-rich (Al,Ga)N and improve the hole injection. Indeed, nitride-based TJs mainly inject holes with a Γ7 symmetry, which could lead to transverse magnetic polarization of the light emitted by the diode. We have experimentally investigated this important issue and delivered a clear answer to this question.

Domaines: Optique [physics.optics]

Jean-Yves Duboz, Victor Fan Arcara, Cynthia Kessaci, Stéphane Vézian, Benjamin Damilano. Light Polarization in Tunnel Junction Injected UV Light‐Emitting Diodes. physica status solidi (a), 2022, 219 (7), pp.2200055. ⟨10.1002/pssa.202200055⟩. ⟨hal-03828269⟩