Efficient Coupling of Single Photons into Tilted Nanofiber Bragg Gratings
NOPR - NISCAIR Online Periodicals Repository
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Title |
Efficient Coupling of Single Photons into Tilted Nanofiber Bragg Gratings
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Creator |
Sahu, Subrat
Jha, Rajan |
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Subject |
Tilted fiber Bragg grating
Single Photon; cQED |
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Description |
546-553
We report a new gateway towards the light-matter interaction of spontaneous emission from a quantum emitter (QE) in optical nanofiber (ONF) based on nanocavities tilted by some angle with respect to the plane of the fiber cross-section. This structure is designed by three-dimensional finite-difference time-domain simulations to enhance the spontaneous emission decay rate from a QE and maximize the coupling efficiency into the fiber-guided modes. Here, we systematically analyzed the polarization-dependent spontaneous emission characteristics of QE and cavity characteristics of the proposed structure. We show that the coupling efficiency from single emitters can reach as high as ~ 90% with the Purcell factor can be as high as ∼ 65. The results show a 10-fold enhancement factor from a QE in the cavity center compared with the cavity surface. The tilted angle can be optimized to get more transmission and coupling efficiency. This tilted structure has a high Q-factor of ~ 1000 and a low mode volume of ~ 0.56 m3, with a maximum degree of polarization of the single photons has been calculated as high as 96%. For the quantum information and quantum photonics application, this system attracts researchers to a new direction in the quantum world. |
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Date |
2023-07-03T10:53:35Z
2023-07-03T10:53:35Z 2023-07 |
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Type |
Article
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Identifier |
0975-0959 (Online); 0301-1208 (Print)
http://nopr.niscpr.res.in/handle/123456789/62241 https://doi.org/10.56042/ijpap.v61i7.111 |
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Language |
en
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Publisher |
NIScPR-CSIR, India
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Source |
IJPAP Vol.61(07) [July 2023]
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