Title :
A novel modulation scheme in semiconductor light emitters with quantum microcavities: high speed intensity modulation by switching of coupling efficiency of spontaneous emission
Author :
Yamanishi, Masamichi ; Yamamoto, Yoshihisa ; Shiotani, Tsutomu
Author_Institution :
Dept. of Phys. Electron., Hiroshima Univ., Japan
Abstract :
A modulation of coupling efficiency of spontaneous emission is proposed theoretically to result in an ultrawideband modulation of spontaneous output intensity in semiconductor light-emitting devices with quantum microcavities. The proposed modulation scheme does not involve changes in carrier population, but relies purely on the modulation of the coupling efficiency of spontaneous emission caused by electric-field-induced tuning of emission wavelength. An extremely wideband modulation is predicted, showing a cutoff frequency over 10/sup 11/ Hz and being completely free of recombination lifetime limitation.<>
Keywords :
laser cavity resonators; light emitting diodes; optical modulation; semiconductor junction lasers; LED mode operation; coupling efficiency; cutoff frequency; electric-field-induced tuning; emission wavelength; high speed intensity modulation; light emitting triode; modulation scheme; quantum microcavities; semiconductor lasers; semiconductor light emitters; spontaneous emission; spontaneous output intensity; switching; wideband modulation; Cutoff frequency; Intensity modulation; Light emitting diodes; Microcavities; Optical coupling; Optical modulation; Quantum mechanics; Spontaneous emission; Tuning; Ultra wideband technology;
Journal_Title :
Photonics Technology Letters, IEEE
