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Showing result 1 - 5 of 9 essays matching the above criteria.

  1. 1. Quantum Espionage

    University essay from KTH/Tillämpad fysik

    Author : Carlo Ninic Svensson; [2023]
    Keywords : Quantum Nano Photonics; SNSPD; OTDR; Nano Kvantfotonik; SNSPD; OTDR;

    Abstract : This thesis investigates the security of optical fiber communication and demonstrates the feasibility of eavesdropping using different tapping methods and superconducting nanowire single-photon detectors (SNSPDs). Methods for surveillance against fiber intrusion are also investigated. READ MORE

  3. 2. Experimental Study of Magnetic Field Effects on Hairpin SNSPD Turn Designs for Single Photon Detection : Investigating the Relationship between Magnetic Field Strength and SNSPD Performance

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : James Arthur Sutton; [2023]
    Keywords : SNSPD; Hairpin device; Magnetic field effect; Current crowding; SNSPD; Hårnålsanordning; Magnetfältseffekt; Nuvarande trängsel;

    Abstract : Superconducting Nanowire Single Photon Detectors (SNSPDs) are a promising technology for detecting single photon emissions with high efficiency and low noise. This detector class has numerous applications in quantum optics, communication, and sensing. READ MORE

  4. 3. Cold amplification and fiber coupling of a super-conducting nanowire single-photon detector

    University essay from KTH/Tillämpad fysik

    Author : Stéphane Cohen; [2022]
    Keywords : Applied Physics; Tilllämpad fysik;

    Abstract : Single-photon detectors are an essential tool for quantum photonics: one can harness the quantum properties of single photons for quantum communication as well as use the detectors in low illumination applications.Superconducting nanowire single-photon detectors offer high detection efficiency over a widerange of wavelengths, low dark counts, and a good timing resolution compared to single-photonavalanche diodes. READ MORE

  5. 4. Sharing Quantum Resources Across a Metropolitan Network

    University essay from KTH/Tillämpad fysik

    Author : Martin Carlnäs; [2022]
    Keywords : QKD; Entanglement; SNSPD; Quantum Dot; Exciton; Biexciton; QKD; Kvantsammanflätning; SNSPD; Kvant Prick; Exciton; Biexciton;

    Abstract : Kvantsammanflätning har varit ett populärt ämne bland fysiker i snart 100 år då det tydligt belyser hur annorlunda kvantmekanikens värld är jämfört med den klassiska verklighet vi lever i. Med tiden har kvantsammanflätning blivit mer och mer välförstått och teknologier ämnade att utnyttja det har de senaste årtionden kommit allt närmare till industriell använding. READ MORE

  6. 5. Single Photon LSCM in the NIR Range

    University essay from KTH/Tillämpad fysik

    Author : Klara Wallenbro; [2022]
    Keywords : LSCM; NIR; SNSPD; LSCM; NIR; SNSPD;

    Abstract : In this thesis a near-infrared laser scanning confocal microscope (NIR-LSCM) is built to operate with optimal performance at 1550nm in combination with simultaneous LED light imaging at 970nm. For detection, a camera equipped with a complementary metal oxide semiconductor (CMOS) sensor and a superconducting nanowire single photon detector (SNSPD) are used for the LED part and the LSCM part, respectively. READ MORE