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1. Equivalent circuit modeling of traveling-wave superconducting-nanostripe single-photon detectors for silicon quantum photonic integrated circuits

   https://doi.org/10.1117/12.2654772  

   Djamen Tchapda, Loic H.; Bal, Anindya; Nazib, Sami A.; Hutchins-Delgado, Troy A.; Lee, Hosuk; Reymatias, Mark V.; Sommer, Erika M.; Komissarov, Ivan; Nogan, John; Lu, Tzu-Ming; et al (March 2023, Proceedings of SPIE)

   Osiński, Marek; Arakawa, Yasuhiko; Witzigmann, Bernd (Ed.)

   Superconducting nanostripe single-photon detectors (SNSPDs) represent key components in silicon quantum photonic integrated circuits (SiQuPICs). They provide good timing precision, low dark counts, and high efficiency. The design, fabrication, and characterization of SiQuPICs comprising SNSPDs coupled to dielectric optical waveguides are the core objectives of our work. The detectors are positioned directly on the dielectric waveguide core to increase photon absorption by the superconducting nanostripes. We also present results on the SPICE circuit modeling of traveling-wave SNSPDs integrated with Si3N4/SiO2 optical waveguides. 

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2. Integration of superconducting nanostripe single-photon detectors with dielectric waveguides for silicon quantum photonic integrated circuits

   Hutchins-Delgado, Troy A.; Nazib, Sami A.; Lee, Hosuk; Smalley, Jarrett L.; Withers, Nathan J.; Meza-Olivo, Avril A.; Nogan, John; Komissarov, Ivan; Sobolewski, Roman; Mafi, Arash; et al (September 2020, Technical Digest, OSA Quantum 2.0 Conference)

   Raymer, Michael; Monroe, Christopher (Ed.)

   Design, fabrication, and characterization of superconducting nanostripe single-photon detectors integrated with dielectric optical waveguides is reported, whereby part of the upper cladding is removed to enhance absorption of photons by the superconducting nanostripes. 

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3. Design of Superconducting-Nanostripe Single-Photon Detectors for Silicon Quantum Photonic Integrated Circuits

   https://doi.org/10.1109/SUM53465.2022.9858324  

   Tchapda, Loic H.; Nazib, Sami A.; Hutchins-Delgado, Troy A.; Sommer, Erika M.; Lu, Tzu-Ming; Komissarov, Ivan; Sobolewski, Roman; Osinski, Marek (July 2022, 2022 IEEE Photonics Society Summer Topicals Meeting Series (SUM))

   Antonelli, C. (Ed.)

   We report on design of traveling-wave superconducting-nanostripe single-photon detectors for integration with silicon quantum photonic integrated circuits, with varying segment lengths and meander numbers. 

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4. Modeling of Traveling-Wave Superconducting-Nanowire Single-Photon Detectors

   https://doi.org/10.1364/QUANTUM.2022.QW3B.2  

   Djamen Tchapda, Loïc H.; Hutchins-Delgado, Troy A.; Nazib, Sami A.; Lee, Hosuk; Lu, Tzu-Ming; Nogan, John; Komissarov, Ivan; Sobolewski, Roman; Mafi, Arash; Osiński, Marek (January 2022, Quantum 2.0 Conference and Exhibition)

   We report on SPICE circuit modeling of traveling-wave superconducting-nanowire single-photon detectors integrated with Si₃N₄/SiO₂optical waveguides. 

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5. Subwavelength antimonide infrared detector coupled with dielectric resonator antenna

   https://doi.org/10.1117/12.2518807  

   Kazemi, Alireza; Shu, Qingyuan; Dahiya, Vinita; Taghipour, Zahra; Paradis, Pablo; Ball, Christopher; Ronningen, Theodore J.; Zollner, Stefan; Young, Steve M.; Budhu, Jordan; et al (May 2019, Subwavelength Antimonide Infrared Detector Coupled with Dielectric Resonator Antenna)

   Antenna coupled detectors break the intrinsic tradeoff between signal and noise by “collecting over a large area” and “detecting over a small area”. Most antenna coupled detectors in the infrared rely on a metal resonator structure. However, there are losses associated with metallic structures. We have demonstrated a novel long-wave infrared (LWIR) detector that combines a dielectric resonator antenna with an antimonide-based absorber. The detector consists of a 3D, subwavelength InAsSb absorber embedded in a resonant, cylindrical dielectric resonator antenna made of amorphous silicon. This architecture enables the antimonide detection element to shrink to deep subwavelength dimensions, thereby reducing its thermal noise. It is important to note that this concept only applies when (a) the detector noise is limited by bulk noise mechanisms with negligible surface leakage currents and (b) the dominant source of current in the device is due to dark current (such as diffusion) that scales with the volume of the detector. The dielectric resonator enhances the collection of photons with its resonant structure that couples incident radiation to the detector. We will present results on the absorption in structures with and without the dielectric resonator antenna. The signal to noise enhancement in the LWIR photodiodes integrated with the dielectric resonator antenna using radiometric characterization will be discussed. 

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