Browsing by Author "Salmanoğli, Ahmad"

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Citation Count: Salmanoğli, Ahmad; Gökçen, Dinçer (2021). "Design of quantum sensor to duplicate European Robins navigational system", Sensors and Actuators A-Physical, Vol. 322.
Design of quantum sensor to duplicate European Robins navigational system
(2021) Salmanoğli, Ahmad; Gökçen, Dinçer
In this article, we design a quantum device to duplicate the European Robins procedure to precisely deter-mine the migratory route. In the mentioned procedure, the important issue is the geomagnetic field effect on the magnetic momentum of the created radical pairs (triplet-singlet states) dancing with a special fre-quency. To duplicate the procedure, a quantum sensor consisting of two coincident tripartite systems is designed. Each tripartite system is independently excited with the entangled photons (signal and idler). The interesting point is that by manipulation of the system in the right condition, the microwave cavities modes separately affected by the entangled photons can be entangled. The entangled microwave photons play the same role as the triplet-singlet states present in the bird's navigational system. The key point in the design of the quantum sensor is that the entanglement between microwave photons can be strongly affected by the external magnetic field. In fact, this is the criterion employed by the quantum sensor to sense the magnetic field intensity and the direction. To analyze the system, the canonical quantization (or microscopic) method is used to determine the sensor's Hamiltonian, and also the system dynamics equations of motions are analytically derived using Heisenberg-Langevin equations.
Citation Count: Salmanoğli, Ahmad (2019). "Entangled two-photon interference", Optik, Vol. 179, pp. 909-913.
Entangled two-photon interference
(2019) Salmanoğli, Ahmad; 280089
This article proposes a theoretical solution to one of the original problems of the double-slit experiment, which expresses that it is impossible to identify the photon's path without disturbing it We contend that using the entangled two-photon (signal and idler photons) and inserting a double-slit into the beam of signal (idler) photon, it is possible to distinguish the path of signal (idler) photon, just by the detection of the idler (signal) photon. Basically, the signal and idler photons are highly correlated to each other due to the momentum conservation. Indeed, the photon-photon correlation originates the nonlocal interference effect, so using this effect, lets us know about which path the photon goes through, with its conjugate photon's position detection rather than its detection.
Citation Count: Salmanoğli, Ahmad; Gökçen, Dinçer; Geçim, H. Selçuk (2020). "Entanglement Sustainability in Quantum Radar", IEEE Journal of Selected Topics in Quantum Electronics, Vol. 26, No. 6.
Entanglement Sustainability in Quantum Radar
(2020) Salmanoğli, Ahmad; Gökçen, Dinçer; Geçim, H. Selçuk; 182579
In this study, some important parts of a quantum radar are designed using the quantum electrodynamics theory and significantly focused on entanglement conservation. Quantum radar is generally defined as a detection sensor that utilizes the microwave photons like a classical radar and simultaneously employs quantum phenomena to improve detection, identification, and resolution capabilities. However, the entanglement is so fragile, unstable, and difficult to preserve for a long time. Also, more importantly, the entangled states have a tendency to leak away due to the noise. The points mentioned enforces that the entangled states should be carefully studied at each step of the quantum radar detection processes such as the creation of the entangled photons in the tripartite system, the amplification of the photons, the propagation into the atmosphere, and the reflection from the target. At each step, the parameters related to the real mediums and target material can affect the entangled states to leak away easily. The results of simulations indicate that the features of the tripartite system and amplifier are so important to lead the detected photons to remain entangled with the optical modes. Nonetheless, it is found that a lot of entangled photons lose the related non-classical correlation.
Citation Count: Salmanoğli, Ahmad (2020). "Identification of Circulating Tumor Cells Using Plasmonic Resonance Effect: Lab-on-a- Chip Analysis and Modelling", Journal of Nanoscience and Nanotechnology, Vol. 20, No. 3, pp. 1341-1350.
Identification of Circulating Tumor Cells Using Plasmonic Resonance Effect: Lab-on-a- Chip Analysis and Modelling
(2020) Salmanoğli, Ahmad; 280089
Circulating tumor cells are widely used as biomarkers of cancer. Although early detection of these cells is vital for diagnosis and prognosis of deadly cancer, it is still a challenging issue due to the complex matrix of blood and their low presence in the bloodstream. In the present study, we propose a micro-channeled lab-on-a-chip system using two distinct methods based upon dielectrophoretic force and electrical properties of cells to increase the cell detection capability and identification efficiency and accuracy. The dielectric properties of cells contribute to the difference between negatively charged residues on the cell surface. Firstly, the dielectrophoretic force is used to separate background cells; then, the proposed high-accuracy identification method is used to better examine and study the unidentified cells. In the next phase, by amplification of the current of the unidentified cells flowing through the nanoparticle plasmonic resonance effects, the microfluidics output efficiency is significantly improved. As a result, highly accurate cell identification is achieved by taking advantage of the nanoparticle plasmonic properties. Overall, nanoparticle scattering in the plasmonic resonance condition, as well as their plasmonic hybridization, can improve output signal-to-noise ratio.
Citation Count: Salmanoğli, Ahmad; Geçim, H. Selçuk (2020). "Optical and Microcavity Modes Entanglement by Means of Plasmonic Opto-Mechanical System", IEEE Journal of Selected Topics in Quantum Electronics, Vol. 26, No. 3.
Optical and Microcavity Modes Entanglement by Means of Plasmonic Opto-Mechanical System
(2020) Salmanoğli, Ahmad; Geçim, H. Selçuk; 182579
In this study, plasmonic opto-mechanical tripartite system is proposed to improve the performance of the traditional tripartite opto-mechanical system. In the new design, significantly, optical cavity and microwave cavity modes are directly coupled to each other. The originality of this work consists in embedding a microsphere in the optical cavity where the plasmon-plasmon interaction between the metal plates generates a plasmon mode inside the optical cavity and changes the electric field distribution. The plasmonic property influences the microsphere electrical properties and interacts with the photonic mode inside the optical cavity by which the microwave cavity properties are also affected through coupling to the optical cavity. Microsphere introduces a capacitor as a function of plasmonic properties that can strongly influence the microwave cavity resonance frequency. That is the feature that we want to utilize to enhance the performance of the system at high temperature. The results show that the optical cavity and microwave cavity modes remain entangled at high temperature. It is contributed to the plasmonic-based capacitor induced by the microsphere which is not affected by the thermally induced photons (noise). It is worth mentioning that the induced noise strongly restricts the traditional tripartite system operated with a wide bandwidth.
Citation Count: Salmanoğli, Ahmad; Gökçen, Dinçer (2020). "Optoelectronic based Quantum Radar: Entanglement Sustainability Improving at High Temperature", Sensors.
Optoelectronic based Quantum Radar: Entanglement Sustainability Improving at High Temperature
(2020) Salmanoğli, Ahmad; Gökçen, Dinçer; 280089
Citation Count: Salmanoğli, Ahmad; Gökçen, Dinçer; Geçim, H. Selçuk (2019). "Plasmonic Effect on Quantum-Dot Photodetector Responsivity", IEEE Sensors Journal, Vol. 19, no. 10, pp. 3660-3667.
Plasmonic Effect on Quantum-Dot Photodetector Responsivity
(2019) Salmanoğli, Ahmad; Gökçen, Dinçer; Geçim, H. Selçuk; 280089; 182579
In this paper, we analyze and simulate the plasmonic effect on the quantum-dot photodetector responsivity. For this purpose, a plasmonic-based quantum-dot photodetector is designed in which a few quantum dots are embedded in the hot-spot regions of the plasmonic nanoparticles, wherein a high-intensity localized field is created. Notably, due to the maximum overlapping of the plasmonic field with the quantum dots at the hot spot, some of the optical characteristics of the quantum dot, particularly the spontaneous emission decay rate, are changed. This paper focuses on the engineering of the decay rate, through which we found that the quantum-dot photodetector responsivity is strongly enhanced with the order of 100 times at the visible range. For analyzing the proposed system, we first work on the plasmonic effect of the nanoparticle on the quantum-dot lifetime using the Heisenberg-Langevin equations. It is shown that by embedding the quantum dots at the hot spot of the nanoparticle, the decay rate of the quantum dot is dramatically influenced. In the following, plasmonic-quantum dot system responsivity is theoretically examined using a time-varying perturbation theory. Using this approach is necessary because the spontaneous emission cannot be analyzed with the classical methods. Consequently, it is proved that using plasmonic effect leads to enhanced photodetector responsivity, suggesting that even very small incoming signals are detectable.