29 August 2017 Towards integrated superconducting detectors on lithium niobate waveguides
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Abstract
Superconducting detectors are now well-established tools for low-light optics, and in particular quantum optics, boasting high-eciency, fast response and low noise. Similarly, lithium niobate is an important platform for integrated optics given its high second-order nonlinearity, used for high-speed electro-optic modulation and polarization conversion, as well as frequency conversion and sources of quantum light. Combining these technologies addresses the requirements for a single platform capable of generating, manipulating and measuring quantum light in many degrees of freedom, in a compact and potentially scalable manner. We will report on progress integrating tungsten transition-edge sensors (TESs) and amorphous tungsten silicide superconducting nanowire single-photon detectors (SNSPDs) on titanium in-di‚used lithium niobate waveguides. ‘e travelling-wave design couples the evanescent €eld from the waveguides into the superconducting absorber. We will report on simulations and measurements of the absorption, which we can characterize at room temperature prior to cooling down the devices. Independently, we show how the detectors respond to ƒood illumination, normally incident on the devices, demonstrating their functionality.
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Jan Philipp Höpker, Jan Philipp Höpker, Moritz Bartnick, Moritz Bartnick, Evan Meyer-Scott, Evan Meyer-Scott, Frederik Thiele, Frederik Thiele, Stephan Krapick, Stephan Krapick, Nicola Montaut, Nicola Montaut, Matteo Santandrea, Matteo Santandrea, Harald Herrmann, Harald Herrmann, Sebastian Lengeling, Sebastian Lengeling, Raimund Ricken, Raimund Ricken, Viktor Quiring, Viktor Quiring, Torsten Meier, Torsten Meier, Adriana Lita, Adriana Lita, Varun Verma, Varun Verma, Thomas Gerrits, Thomas Gerrits, Sae Woo Nam, Sae Woo Nam, Christine Silberhorn, Christine Silberhorn, Tim J. Bartley, Tim J. Bartley, } "Towards integrated superconducting detectors on lithium niobate waveguides", Proc. SPIE 10358, Quantum Photonic Devices, 1035809 (29 August 2017); doi: 10.1117/12.2273388; https://doi.org/10.1117/12.2273388
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