Unidirectional Photon Coupling Using Asymmetric Diamond Emitters with Enhanced Spontaneous Emission
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2022-05-21 |
| Journal | Advanced Quantum Technologies |
| Authors | Satyajit Murmu, Avijit Kumar, Rajan Jha |
| Institutions | Indian Institute of Technology Bhubaneswar |
| Citations | 9 |
Abstract
Section titled āAbstractāAbstract The directional coupling of single photon emission from nitrogen vacancy (NV - ) emitters to optical systems for various applications requires a suitable interface between NV - emitters and optical waveguides. Unidirectional coupling of photons may have significant importance in next generation quantum technology such as quantum and complex optical networks, quantum communication, and multiāscale quantum photonics devices including quantum nonālinearity and quantum metrology. Here, a hybrid asymmetric structure of elliptically faceted (ELFA) diamond nanowire with Bragg grating (BG) containing negatively charged NV - center for efficient and unidirectional optical coupling to optical nanowire (waveguide) is proposed. The calculations indicate that the structure can provide coupling efficiency of ā90% toward the elliptically facet direction and ā1% in the opposite direction. Further, Purcell factor is enhanced due to the augmented electric field intensity in the ELFA structure. This structure is significantly robust against imperfect placement and rotational alignment of dipole from its intended position.