TY - JOUR
T1 - Designing InGaN/GaN nano-LED arrays for étendue-limited applications
AU - Fox, Sophia
AU - O'Kane, Simon
AU - Lis, Szymon
AU - Allsopp, Duncan
PY - 2015/4
Y1 - 2015/4
N2 - This paper presents the far field results of a study by simulation using the finite-difference time-domain (FDTD) method of vertical light emitting diode structures with an incorporated ordered nanorod array in place of the typical surface roughened region. For a dipole placed directly below the centre nanorod in the FDTD model, highly collimated light is achieved by changing the radii of the nanorods, for a fixed array pitch, which we attribute mainly to Bragg diffraction. By changing the pitch only, higher diffraction orders are observed in the far field emission as the pitch is increased and a relative increase in the directionality of emission is predicted.
AB - This paper presents the far field results of a study by simulation using the finite-difference time-domain (FDTD) method of vertical light emitting diode structures with an incorporated ordered nanorod array in place of the typical surface roughened region. For a dipole placed directly below the centre nanorod in the FDTD model, highly collimated light is achieved by changing the radii of the nanorods, for a fixed array pitch, which we attribute mainly to Bragg diffraction. By changing the pitch only, higher diffraction orders are observed in the far field emission as the pitch is increased and a relative increase in the directionality of emission is predicted.
KW - Far-field emission profiles
KW - InGaN/GaN
KW - Nano-LED
UR - http://www.scopus.com/inward/record.url?scp=84923241086&partnerID=8YFLogxK
UR - http://dx.doi.org/10.1002/pssc.201400240
U2 - 10.1002/pssc.201400240
DO - 10.1002/pssc.201400240
M3 - Article
SN - 1862-6351
VL - 12
SP - 456
EP - 459
JO - Physica Status Solidi (C) Current Topics in Solid State Physics
JF - Physica Status Solidi (C) Current Topics in Solid State Physics
IS - 4-5
ER -