O'Brien, A.Balkan, N.Boland-Thoms, A.Adams, M.Bek, A.Serpengüzel, A.Aydınlı, A.Roberts, J.2016-02-082016-02-0819990306-8919http://hdl.handle.net/11693/25131The Hot Electron Light Emitting and Lasing in Semiconductor Heterostructure (HELLISH-1) device is a novel surface emitter which utilises hot carrier transport parallel to the layers of a Ga1 - xAlxAs p-n junction incorporating a single GaAs quantum well on the n-side of the junction plane. Non-equilibrium electrons are injected into the quantum well via tunnelling from the n-layer. In order to preserve the charge neutrality in the depletion region, the junction undergoes a self-induced internal biasing. As a result the built-in potential on the p-side is reduced and hence the injection of non-equilibrium holes into the quantum well in the active region is enhanced. The work presented here shows that a distributed Bragg reflector grown below the active region of the HELLISH device increases the emitted light intensity by two orders of magnitude and reduces the emission line-width by about a factor of 3 in comparison with the original HELLISH-1 structure. Therefore, the device can be operated as an ultrabright emitter with higher spectral purity.EnglishElectron tunnelingHeterojunctionsHot carriersInjection lasersMirrorsSemiconducting gallium arsenideSemiconductor device structuresDistributed Bragg reflectors (DBR)Electron injectionSurface emitting lasersQuantum well lasersArticle10.1023/A:10069611239751572-817X