Quantum Frequency Down-conversion of Single Photons in Nonlinear Optical Waveguides PDF Download

Author: Sebastian Zaske
Publisher:
ISBN:
Category :
Languages : en
Pages : 173

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Author: Andreas Christ
Publisher: Elsevier Inc. Chapters
ISBN: 0128058102
Category : Science
Languages : en
Pages : 81

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In this chapter we review the process of parametric down-conversion (PDC) and discuss the different methods to use PDC as a heralded single-photon source. PDC is a non-linear optical process, where an incoming pump photon decays, under energy and momentum conservation, into a photon-pair. The creation of photons in pairs allows for the implementation of a single-photon source by detecting one photon (trigger) to herald the presence of its partner (signal). The engineering possibilities of PDC enable the generation of single-photons with high rates in a wide range of frequencies. This chapter is structured as follows: Section 11.2 describes the principles of PDC in non-linear media. We derive the quantum state of the generated photon-pairs, investigate the spectral purity and photon-number purity of the heralded signal photon and discuss the achievable single-photon generation rates. In section 11.3 we turn towards experimental realizations and introduce bulk crystal PDC. Section 11.4 elaborates on the use of periodic poling to engineer the PDC process. Finally, section 11.5 gives an overview over PDC in waveguides. A comparison of experimental data from various heralded singe-photon sources based on PDC is presented in section 11.6 with an overview of nonlinear materials suited for PDC given in section 11.7.

Author: Jason Scott Pelc
Publisher:
ISBN:
Category :
Languages : en
Pages :

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The ability to manipulate the carrier frequency of quantum states of light, through a process called quantum frequency conversion (QFC), has numerous applications for both technology and basic science. For example, one can upconvert a single-photon-level signal in the 1.5-micron telecommunications band (where single-photon detection has been challenging) to a visible wavelength to take advantage of well-developed single-photon detectors based on silicon avalanche photodiodes. On the more fundamental side, the manipulation of a single photon's frequency may enable the construction of networks of dissimilar quantum systems, whereby one can imagine generating many-body entangled quantum states over vast distances. Quantum frequency conversion will only be useful if it can be done both efficiently and with little added noise. We demonstrated a conversion efficiency exceeding 99.99% using reverse-proton-exchange waveguides in periodically poled lithium niobate with approximately 150 mW of pump power. Noise has been a more serious issue: the generation of noise photons, due to inelastic scattering of light from the strong pump laser used to drive the frequency conversion, has limited the utility of QFC devices in many applications. We present an analysis of the two primary noise processes in QFC devices (spontaneous Raman scattering and spontaneous parametric fluorescence), and offer solutions on how they may be either mitigated or avoided completely. We then discuss applications of QFC devices for up- and downconversion of single-photon signals. We used a long-wavelength pump to enable high-efficiency and low-noise single-photon detection for 1550-nm telecom band signals, and demonstrated a cascaded frequency conversion approach that enabled low timing jitter as well. We also demonstrated a downconversion quantum interface, in which the emission from a single semiconductor quantum dot at a wavelength of 910 nm was downconverted to 1560 nm while maintaining the single-photon character of the light. The results presented in this dissertation indicate a promising future for QFC devices as the field of quantum communications matures.

Author: Keyu Xia
Publisher: BoD – Books on Demand
ISBN: 183880353X
Category : Technology & Engineering
Languages : en
Pages : 112

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This short book aims to present basic information about single photons in a quick read but with not many details. For this purpose, it only introduces the basic concept of single photons, the most important method of generating single photons in experiments, and a specific emerging field.

Author: Stephan Krapick
Publisher:
ISBN:
Category :
Languages : en
Pages : 229

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Integrated quantum optics is a young field of research, and its impact on real-world quantum applications is growing rapidly. Efficient, compact, scalable and long-term-stable sources for quantum-optical states play an important role within that framework. The functionality of the sources is intended to guarantee the quality and quantity of the generated states, while high integration densities are desired. Mature technologies and the development of novel measurement methods and apparatus build the basis.In this dissertation we describe the fabrication and thorough characterization of a nonlinear optical photon source. Its compact design, based on titanium-diffused, periodically poled waveguide structures in lithium niobate allows for the energy-efficient and long-term-stable operation. Several passive and active optical components on a single chip provide us with the generation of photon pairs with high brightness, and we are able to herald single photons with high efficiencies. We show that the functionalities of our photon-pair source suffices the prerequisites of applicable passive-decoy-state quantum cryptography, by which the photon-number-splitting attack of an eavesdropper can be detected and averted.The main focus lies on cascaded nonlinear frequency conversion processes in periodically poled waveguide structures on the very same device. We show that cascaded sum-frequency generation from the telecom wavelength range to the visible is possible, and that we realized a tunable green laser source in this way. Using cascaded parametric down-conversion we generate almost noise-less three-photon quantum states on a single chip for the first time. ; eng

Author: Zhi-Yuan Zhou
Publisher:
ISBN:
Category : Electronic books
Languages : en
Pages : 0

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Nonclassical photon sources are key components in quantum information science and technology. Here, the basic principles and progresses for single photon generation and their further manipulation based on second- or third-order nonlinear processes in various degrees of freedom are briefly reviewed and discussed. Based on spontaneous parametric down-conversion and spontaneous four-wave mixing, various nonlinear materials such as quasi-phase-matching crystals, dispersion-shifted fibers, and silicon-on-insulator waveguides are used for single photon generation. The kinds of entanglement generated include polarization, time-energy, time-bin, and orbital angular momentum. The key ingredient for photon pair generation in nonlinear processes is described and discussed. Besides, we also introduce quantum frequency conversion for converting a single photon from one wavelength to another wavelength, while keeping its quantum properties unchanged. Finally, we give a comprehensive conclusion and discussion about future perspectives for single photon generation and manipulation in nonlinear processes. This chapter will provide an overview about the status, current challenge, and future perspectives about single photon generation and processing in nonlinear processes.

Author: Stephen Barnett
Publisher: Oxford University Press
ISBN: 9780198563617
Category : Mathematics
Languages : en
Pages : 302

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Book Description
This work presents the mathematical methods widely used by workers in the field of quantum optics. It deals with the physical assumptions which lead to the models and approximations employed, but the main purpose of the text is to give a firm grounding in those techniques needed to derive analytical solutions to problems.

Author: Rodney Loudon
Publisher: OUP Oxford
ISBN: 0191589780
Category :
Languages : en
Pages : 454

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Book Description
This third edition, like its two predecessors, provides a detailed account of the basic theory needed to understand the properties of light and its interactions with atoms, in particular the many nonclassical effects that have now been observed in quantum-optical experiments. The earlier chapters describe the quantum mechanics of various optical processes, leading from the classical representation of the electromagnetic field to the quantum theory of light. The later chapters develop the theoretical descriptions of some of the key experiments in quantum optics. Over half of the material in this third edition is new. It includes topics that have come into prominence over the last two decades, such as the beamsplitter theory, squeezed light, two-photon interference, balanced homodyne detection, travelling-wave attenuation and amplification, quantum jumps, and the ranges of nonliner optical processes important in the generation of nonclassical light. The book is written as a textbook, with the treatment as a whole appropriate for graduate or postgraduate students, while earlier chapters are also suitable for final- year undergraduates. Over 100 problems help to intensify the understanding of the material presented.

Author: Yuanhua Li
Publisher:
ISBN:
Category : Electronic books
Languages : en
Pages : 0

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Single-photon frequency conversion for quantum interface plays an important role in quantum communications and networks, which is crucial for the realization of quantum memory, faithful entanglement swapping and quantum teleportation. In this chapter, we will present our recent experiments about single-photon frequency conversion based on quadratic nonlinear processes. Firstly, we demonstrated spectrum compression of broadband single photons at the telecom wavelength to the near-visible window, marking a critical step towards coherent photonic interface. Secondly, we demonstrated the nonlinear interaction between two chirped broadband single-photon-level coherent states, which may be utilized to achieve heralding entanglement at a distance. Finally, we theoretically introduced and experimentally demonstrated single-photon frequency conversion in the telecom band, enabling switching of single photons between dense wavelength-division multiplexing channels. Moreover, quantum entanglement between the photon pair is maintained after the frequency conversion. Our researches have realized three significant quantum interfaces via single-photon frequency conversion, which hold great promise for the development of quantum communications and networks.

Author: Usman Younis
Publisher:
ISBN:
Category : Chemical detectors
Languages : en
Pages : 156

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