Inverse Design for Full Control of Spontaneous Emission Using Light Emitting Scattering Optical Elements

Andreas Håkansson, Hideki T. Miyazaki, José Sánchez-Dehesa
2006 Physical Review Letters  
Full control of spontaneous emission is essential in various fields of optics. This work presents an inverse designed light-emitting scattering optical element that includes full control of spontaneously emitted photons (i.e., enhancement at a central frequency and suppression at neighboring frequencies) and directionality of the output beam. This is achieved by embedding a one-dimensional optical active element inside a cluster of square shaped gallium arsenide dielectric rods whose positions
more » ... re optimized by a genetic algorithm. Large spontaneous emission enhancement of >70 is predicted at the transition wavelength if high-quality sources are employed. Moreover, neighboring wavelengths are simultaneously suppressed over 10 times. Finally, the radiated beam is highly collimated to only 6 and contains 30 times the energy emitted by the source placed in free space.
doi:10.1103/physrevlett.96.153902 pmid:16712158 fatcat:5yibv62shfcqpf26yr57shphrq