Recently, there is growing interest in integrating alkali vapors with nanoscale photonic structures, such as nano-waveguides, resonators and nanoantennas. Nanoscale confinement of electromagnetic fields may introduce ...
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We introduce a direct, linear sampling approach to imaging in an acoustic waveguide with sound hard walls. The waveguide terminates at one end and has unknown geometry due to compactly supported wall deformations. The...
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We introduce a direct, linear sampling approach to imaging in an acoustic waveguide with sound hard walls. The waveguide terminates at one end and has unknown geometry due to compactly supported wall deformations. The goal of imaging is to determine these deformations and to identify localized scatterers in the waveguide, using a remote array of sensors that emits time harmonic probing waves and records the echoes. We present a theoretical analysis of the imaging approach and illustrate its performance with numerical simulations.
Guiding transports of classical waves has inspired a wealth of nontrivial physics and momentous applications in a wide range of fields. To date, a robust and compact way to guide energy flux travelling along an arbitr...
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The quest for practical waveguides operating in the terahertz range faces two major hurdles: large losses and high rigidity. While recent years have been marked by remarkable progress in lowering the impact of materia...
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In this work, we develop a design methodology to generate spectrally pure photon pairs in asymmetric heterogeneously coupled waveguides by spontaneous parametric down-conversion. Mode coupling in a system of waveguide...
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- In this work we investigate the nonperturbative decay dynamics of a quantum emitter coupled to a composite right/left handed transmission line (CRLH-TL). Our theory captures the contributions from the different spec...
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For the measurement of the dynamics of fusion-born alpha particles Eα ≤ 3.5 MeV in ITER using collective Thomson scattering (CTS), safe transmission of a gyrotron beam at mm-wavelength (1 MW, 60 GHz) passing the ele...
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Propagation of rays in 2D and 3D corrugated waveguides is performed in the general framework of stability indicators. The analysis of stability is based on the Lyapunov and Reversibility error. It is found that the er...
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Coherent quantum optics, where the phase of a photon is not scrambled as it interacts with an emitter, lies at the heart of many quantum optical effects and emerging technologies. Solid-state emitters coupled to nanop...
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Coherent quantum optics, where the phase of a photon is not scrambled as it interacts with an emitter, lies at the heart of many quantum optical effects and emerging technologies. Solid-state emitters coupled to nanophotonic waveguides are a promising platform for quantum devices, as this element can be integrated into complex photonic chips. Yet, preserving the full coherence properties of the coupled emitter-waveguide system is challenging because of the complex and dynamic electromagnetic landscape found in the solid state. Here, we review progress toward coherent light-matter interactions with solid-state quantum emitters coupled to nanophotonic waveguides. We first lay down the theoretical foundation for coherent and nonlinear light-matter interactions of a two-level system in a quasi-one-dimensional system, and then benchmark experimental realizations. We discuss higher order nonlinearities that arise as a result of the addition of photons of different frequencies, more complex energy level schemes of the emitters, and the coupling of multiple emitters via a shared photonic mode. Throughout, we highlight protocols for applications and novel effects that are based on these coherent interactions, the steps taken toward their realization, and the challenges that remain to be overcome.
Er3+-doped silica glass microspheres (mu S) with diameters of similar to 25-40 mu m were fabricated by using an electrical discharge method. The single-mode optical tapered fibers were used to guide the pumped laser i...
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Er3+-doped silica glass microspheres (mu S) with diameters of similar to 25-40 mu m were fabricated by using an electrical discharge method. The single-mode optical tapered fibers were used to guide the pumped laser into the mu S surface and collect the resulting lasing emission. The observation of whispering-gallery-mode (WGM) at telecom regime is quantified. With the presented scheme, the selective single-or multi-emitted modes of the mu S laser can be obtained by adjusting the coupling gap between the collection tapered fiber and the mu S surface. To overcome the collection tapered fiber's vibration at close range of the coupling gap, the guiding and coupling losses, while being compact enough to fit with complementary metal oxide semiconductor (CMOS) device, the integration of a mu S with silicon-on-insulator (SOI) slotted photonic crystal waveguides is proposed and modeled with the help of finite-difference time-domain (FDTD) simulations. The designed structures may find application for the promising photonic devices such as the ultrahigh sensitivity sensors, the lasing sources, and towards advanced quantum communications.
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