Efficient fiber-coupled single-photon source based on quantum dots in a photonic-crystal waveguide
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Efficient fiber-coupled single-photon source based on quantum dots in a photonic-crystal waveguide. / Daveau, Raphaël S.; Balram, Krishna C.; Pregnolato, Tommaso; Liu, Jin; Lee, Eun H.; Song, Jin D.; Verma, Varun; Mirin, Richard; Nam, Sae Woo; Midolo, Leonardo; Stobbe, Søren; Srinivasan, Kartik; Lodahl, Peter.
In: Optica, Vol. 4, No. 2, 20.02.2017, p. 178-184.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Efficient fiber-coupled single-photon source based on quantum dots in a photonic-crystal waveguide
AU - Daveau, Raphaël S.
AU - Balram, Krishna C.
AU - Pregnolato, Tommaso
AU - Liu, Jin
AU - Lee, Eun H.
AU - Song, Jin D.
AU - Verma, Varun
AU - Mirin, Richard
AU - Nam, Sae Woo
AU - Midolo, Leonardo
AU - Stobbe, Søren
AU - Srinivasan, Kartik
AU - Lodahl, Peter
PY - 2017/2/20
Y1 - 2017/2/20
N2 - Many photonic quantum information processing applications would benefit from a high brightness, fiber-coupled source of triggered single photons. Here, we present a fiber-coupled photonic-crystal waveguide (PCWG) singlephoton source relying on evanescent coupling of the light field from a tapered outcoupler to an optical fiber. A two-step approach is taken where the performance of the tapered outcoupler is recorded first on an independent device containing an on-chip reflector. Reflection measurements establish that the chip-to-fiber coupling efficiency exceeds 80%. The detailed characterization of a high-efficiency PCWG extended with a tapered outcoupling section is then performed. The corresponding overall single-photon source efficiency is 10.9%±2.3%, which quantifies the success probability to prepare an exciton in the quantum dot, couple it out as a photon in the waveguide, and subsequently transfer it to the fiber. The applied outcoupling method is robust, stable over time, and broadband over several tens of nanometers, which makes it a highly promising pathway to increase the efficiency and reliability of planar chip-based single-photon sources.
AB - Many photonic quantum information processing applications would benefit from a high brightness, fiber-coupled source of triggered single photons. Here, we present a fiber-coupled photonic-crystal waveguide (PCWG) singlephoton source relying on evanescent coupling of the light field from a tapered outcoupler to an optical fiber. A two-step approach is taken where the performance of the tapered outcoupler is recorded first on an independent device containing an on-chip reflector. Reflection measurements establish that the chip-to-fiber coupling efficiency exceeds 80%. The detailed characterization of a high-efficiency PCWG extended with a tapered outcoupling section is then performed. The corresponding overall single-photon source efficiency is 10.9%±2.3%, which quantifies the success probability to prepare an exciton in the quantum dot, couple it out as a photon in the waveguide, and subsequently transfer it to the fiber. The applied outcoupling method is robust, stable over time, and broadband over several tens of nanometers, which makes it a highly promising pathway to increase the efficiency and reliability of planar chip-based single-photon sources.
U2 - 10.1364/OPTICA.4.000178
DO - 10.1364/OPTICA.4.000178
M3 - Journal article
C2 - 28584859
AN - SCOPUS:85013343492
VL - 4
SP - 178
EP - 184
JO - Optica
JF - Optica
SN - 2334-2536
IS - 2
ER -
ID: 184612466