2015
DOI: 10.3390/technologies4010001 View full text |Buy / Rent full text
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Abstract: Abstract:We report on enhancing the photon-extraction efficiency (PEE) of deterministic quantum dot (QD) microlenses via anti-reflection (AR) coating. The AR-coating deposited on top of the curved microlens surface is composed of a thin layer of Ta 2 O 5 , and is found to effectively reduce back-reflection of light at the semiconductor-vacuum interface. A statistical analysis of spectroscopic data reveals, that the AR-coating improves the light out-coupling of respective microlenses by a factor of 1.57˘0.71, i… Show more

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“…This represents a significant improvement (by a factor of 5) compared with photon twins generated with atoms17. As the outcoupling of a photon twin depends quadratically on the photon-extraction efficiency of the microlens, we anticipate further improved TPRs of ∼1.3–2.1 MHz using anti-reflection coatings37 or a bottom gold mirror31 (assuming photon extraction efficiencies of 50–80% and excitation at λ =850 nm).…”
Section: Resultsmentioning
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“…This represents a significant improvement (by a factor of 5) compared with photon twins generated with atoms17. As the outcoupling of a photon twin depends quadratically on the photon-extraction efficiency of the microlens, we anticipate further improved TPRs of ∼1.3–2.1 MHz using anti-reflection coatings37 or a bottom gold mirror31 (assuming photon extraction efficiencies of 50–80% and excitation at λ =850 nm).…”
Section: Resultsmentioning
“…Within the last few years, a lot of progress was made with such single photon sources [87]. Single photons can be obtained from heralded sources exploiting parametric down-conversion [38,88,89] or single emitters like single molecules [90,91], single atoms [92,93], quantum dots [94][95][96], silicon nanowires [97], silicon carbide [98] or nitrogen vacancies in diamond [99,100].…”
Section: Informed Consent Statement: Not Applicablementioning
“…Within the last few years, a lot of progress was made with such single photon sources [66]. Single photons can be obtained from heralded sources exploiting parametric down-conversion [25,67,68] or single emitters like single molecules [69,70], single atoms [71,72], quantum dots [73,74,75], silicon nanowires [76], silicon carbide [77] or nitrogen vacancies in diamond [78,79].…”
Section: Appendix A3 Single Photon Sourcesmentioning