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Efficient Coupling of Single Photons into Tilted Nanofiber Bragg Gratings

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Title Efficient Coupling of Single Photons into Tilted Nanofiber Bragg Gratings
 
Creator Sahu, Subrat
Jha, Rajan
 
Subject Tilted fiber Bragg grating
Single Photon; cQED
 
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.
 
Date 2023-07-03T10:53:35Z
2023-07-03T10:53:35Z
2023-07
 
Type Article
 
Identifier 0975-0959 (Online); 0301-1208 (Print)
http://nopr.niscpr.res.in/handle/123456789/62241
https://doi.org/10.56042/ijpap.v61i7.111
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJPAP Vol.61(07) [July 2023]