Control of spontaneous emission dynamics in microcavities with chiral exceptional surfaces

Q. Zhong, A. Hashemi, K. Özdemir, R. El-Ganainy

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25 Scopus citations


We investigate spontaneous emission from a quantum emitter located within the mode volume of a microring resonator that features chiral exceptional points. We show that this configuration offers enough degrees of freedom to exhibit a full control to either enhance or suppress the emission process. Particularly, we demonstrate that the Purcell factor can be enhanced by a factor of two beyond its value in an identical microring operating at a diabolic point. Our conclusions, which are derived using a non-Hermitian Hamiltonian formalism, are confirmed by employing full-wave simulations of realistic photonic structures and materials. Our results offer a straightforward route to improve the performance of single photon sources using current photonics technology without the need for building optical resonators with ultrahigh quality factors or nanoscale volumes.

Original languageEnglish (US)
Article number013220
JournalPhysical Review Research
Issue number1
StatePublished - Mar 8 2021

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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