Tailoring a nanofiber for enhanced photon emission and coupling efficiency from single quantum emitters

Li, Wenfang; Du, Jinjin; Chormaic, Síle Nic

doi:10.1364/ol.43.001674

Cited by 29 publications

(19 citation statements)

References 48 publications

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“…However, the quality (Q) factors of the NFBCs were approximately 250. A cavity structure of air-nanohole arrays was very recently fabricated on a nanofiber [26,28]. However, the Q factors of the previously reported NFBCs have been limited to a value of several hundred [25,26].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of a nanofiber Bragg cavity with high quality factor using a focused helium ion beam

et al. 2019

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Nanofiber Bragg cavities (NFBCs) are solid-state microcavities fabricated in an optical tapered fiber. NFBCs are promising candidates as a platform for photonic quantum information devices due to their small mode volume, ultra-high coupling efficiencies, and ultra-wide tunability. However, the quality (Q) factor has been limited to be approximately 250, which may be due to limitations in the fabrication process. Here we report high Q NFBCs fabricated using a focused helium ion beam. When an NFBC with grooves of 640 periods is fabricated, the Q factor is over 4170, which is more than 16 times larger than that previously fabricated using a focused gallium ion beam.

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Section: Introductionmentioning

confidence: 99%

Fabrication of a nanofiber Bragg cavity with high quality factor using a focused helium ion beam

et al. 2019

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“…The mode volume was ∼ 1.05 μm 3 and a Q-factor up to 784 ± 87 was achieved. The following year, the authors extended their study to include a slot inside the cavity between the mirrors [112], similar to what was shown in [48]. The slot permits deposition of single emitters at the position of strongest field intensity, that is, within the slot, thereby enhancing emission into the cavity.…”

Section: Fibre-based Optical Cavities Milled With Fibmentioning

confidence: 89%

Fabrication of optical nanofibre-based cavities using focussed ion-beam milling: a review

et al. 2020

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Nanofibre-based optical cavities are particularly useful for quantum optics applications, such as the development of integrated single-photon sources, and for studying fundamental light-matter interactions in cavity quantum electrodynamics (cQED). Although several techniques have been used to produce such cavities, focussed ion beam (FIB) milling is becoming popular; it can be used for the fabrication of complex structures directly in the nanofibre. However, it is challenging to mill insulating materials with highly curved geometries and large aspect ratios, such as silica nanofibres, due to charge accumulation in the material. In this article, we highlight the main features of nanofibres and briefly review cQED with nanofibre-based optical cavities. An overview of the milling process is given with a summary of different FIB milled devices and their applications. Finally, we present our technique to produce nanofibre cavities by FIB milling. To overcome the aforementioned challenges, we present a specially designed base plate with an indium tin oxide (ITO)-coated Si substrate and outline our procedure, which improves stability during milling and increases repeatability.

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“…The mode volume was ∼1.05 µm 3 and a Q-factor up to 784±87 was achieved. The following year, the authors extended their study to include a slot inside the cavity between the mirrors [107], similar to what was shown in [42]. The slot permits deposition of single emitters at the position of strongest field intensity, that is, within the slot, thereby enhancing emission into the cavity.…”

Section: Fibre-based Optical Cavities Milled With Fibmentioning

confidence: 89%

Fabrication of Optical Nanofibre-Based Cavities using Focussed Ion-Beam Milling -- A Review

Romagnoli,

Maeda,

Ward

et al. 2020

Preprint

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Nanofibre-based optical cavities are particularly useful for quantum optics application, such as the development of integrated single-photon sources, and for studying fundamental light-matter interactions in cavity quantum electrodynamics (cQED). Although several techniques have been used to produce nanofibrebased optical cavities, focussed ion beam (FIB) milling is becoming popular; it can be used for the fabrication of complex structures directly in the nanofibre. This technique uses a highly accelerated ion beam to remove atoms from the target material with high resolution. However, it is challenging to mill insulating materials with highly-curved structures and large aspect ratios, such as silica nanofibres, due to charge accumulation in the material that leads to mechanical vibrations and misalignment issues. In this article, we highlight the main features of nanofibres and briefly review cQED with nanofibre-based optical cavities. An overview of the milling process is given with a summary of different FIB milled devices and their applications. Finally, we present our technique to produce nanofibre cavities by FIB milling. To overcome the aforementioned challenges, we present a specially designed base plate with an indium tin oxide (ITO)-coated Si substrate and outline our procedure, which improves stability during milling and increases repeatability.

show abstract

Tailoring a nanofiber for enhanced photon emission and coupling efficiency from single quantum emitters

Cited by 29 publications

References 48 publications

Fabrication of a nanofiber Bragg cavity with high quality factor using a focused helium ion beam

Fabrication of a nanofiber Bragg cavity with high quality factor using a focused helium ion beam

Fabrication of optical nanofibre-based cavities using focussed ion-beam milling: a review

Fabrication of Optical Nanofibre-Based Cavities using Focussed Ion-Beam Milling -- A Review

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