Mode invisibility and single-photon detection

investigation of single-user and multi-user detection methods in mc-cdma systems and comparison of their performances

در این پایان نامه به بررسی روش های آشکارسازی در سیستم های mc-cdma می پردازیم. با توجه به ماهیت آشکارسازی در این سیستم ها، تکنیک های آشکارسازی را می توان به دو دسته ی اصلی تقسیم نمود: آشکارسازی سیگنال ارسالی یک کاربر مطلوب بدون در نظر گرفتن اطلاعاتی در مورد سایر کاربران تداخل کننده که از آن ها به عنوان آشکارساز های تک کاربره یاد می شود و همچنین آشکارسازی سیگنال ارسالی همه ی کاربران فعال موجود در...

Approaches to Single Photon Detection

We present recent results on our development of single photon detectors, including: gated and free-running InGaAs/InP avalanche photodiodes; hybrid detection systems based on sum-frequency generation and Si APDs; and SSPDs (superconducting single photon detectors), for telecom wavelengths; as well as SiPM (Silicon photomultiplier) detectors operating in the visible regime.

Near-Infrared Single-Photon Detection

Infrared single-photon detection by two-photon absorption in silicon

We propose a scheme for infrared single-photon detection based on two-photon absorption at room temperature in Si avalanche photodiodes, where the detected photon’s energy is lower than the band gap and the energy difference is complemented by a pump field. A quantum nonperturbative model is developed for nondegenerate two-photon absorption in direct and indirect semiconductors yielding proper ...

Quantum Detection and Invisibility in Coherent Nanostructures

J. Fransson, ∗ H. C. Manoharan, 3, † and A. V. Balatsky 5 Department of Physics and Materials Science, Uppsala University, Box 534, SE-6.551 21 Uppsala, Sweden Department of Physics, Stanford University, Stanford, CA 94305, USA Stanford Institute for Materials and Energy Sciences, Stanford University, Stanford, CA 94305, USA Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 6...