Jihae Lee1,Minsu Jeong1,Junsuk Rho1,2
Pohang University of Science and Technology1,POSCO-POSTECH-RIST Convergence Research Center for Flat Optics and Metaphotonics2
Jihae Lee1,Minsu Jeong1,Junsuk Rho1,2
Pohang University of Science and Technology1,POSCO-POSTECH-RIST Convergence Research Center for Flat Optics and Metaphotonics2
Hexagonal boron nitride (hBN) has drawn attention as a promising candidate for single-photon sources operating at room temperature.<sup>1</sup> Photonic cavities have been employed for single-photon emitters to enhance the spontaneous emission rate<sup>2</sup>, which is known as the Purcell effect<sup>3</sup>. In this work, we demonstrate Purcell enhancement of the single-photon emission in hBN combined with the bound states in the continuum (BIC) cavity. The cavity is designed to support the BIC mode at the emission wavelength of single-photon emitters. Single-photon emitters in mechanically exfoliated hBN are activated by argon annealing, followed by the integration into the BIC cavity using a deterministic transfer. The lifetime of the single-photon emission is reduced in hBN coupled with the BIC mode.<br/><br/>[1] Caldwell, J.D., Aharonovich, I., Cassabois, G. <i>et al., Nat. Rev. Mater.</i> <b>4</b>, 552–567 (2019).<br/>[2] Kim, S., Fröch, J.E., Christian, J. <i>et al.</i>, <i>Nat. Commun.</i> <b>9</b>, 2623 (2018).<br/>[3] Purcell, E. M., In <i>Confined Electrons Photons</i>, Springer, Boston, 839-883 (1995).