000159423 001__ 159423
000159423 005__ 20181203022156.0
000159423 0247_ $$2doi$$a10.1109/JQE.2009.2024551
000159423 02470 $$2ISI$$a000270147300001
000159423 037__ $$aARTICLE
000159423 245__ $$aTheoretical Investigation of the Radiation Pattern From LEDs Incorporating Shallow Photonic Crystals
000159423 269__ $$a2009
000159423 260__ $$c2009
000159423 336__ $$aJournal Articles
000159423 520__ $$aA theoretical approach based on coupled-mode theory is presented in order to determine the radiation pattern of LEDs incorporating a shallow photonic crystal. From this, a fundamental limit for the directionality of the diffraction of a single guided mode is given. Additionally, the Fabry-Perot resonances are shown to have significant impact on the directionality of diffracted light. For a realistic green-emitting InGaN LED in thin-film configuration the optimum reciprocal lattice vector is derived in terms of absolute diffracted intensity and directionality within a limited acceptance angle. The latter can be as high as 1.8 times the directionality of a Lambertian emitter. Furthermore, the spontaneous emission distribution between guided modes heavily influences the diffracted intensity.
000159423 6531_ $$aCoupled-mode theory
000159423 6531_ $$adiffraction
000159423 6531_ $$aLEDs
000159423 6531_ $$aphotonic crystals (PhCs)
000159423 6531_ $$aLight-Emitting-Diodes
000159423 6531_ $$aHigh Extraction Efficiency
000159423 6531_ $$aSpontaneous Emission
000159423 700__ $$aWiesmann, Christopher
000159423 700__ $$aBergenek, Krister
000159423 700__ $$aHoudre, Romuald
000159423 700__ $$aStanley, Ross P.
000159423 700__ $$aLinder, Norbert
000159423 700__ $$aSchwarz, Ulrich T.
000159423 773__ $$j45$$q1273-1283$$tIeee Journal Of Quantum Electronics
000159423 909C0 $$0252369$$pSB$$xU10077
000159423 909C0 $$0253378$$pSCI-SB-RH$$xU13466
000159423 909CO $$ooai:infoscience.tind.io:159423$$pSB$$particle
000159423 917Z8 $$xWOS-2010-11-30
000159423 937__ $$aEPFL-ARTICLE-159423
000159423 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000159423 980__ $$aARTICLE