Results 91 to 100 of about 251,032 (331)
Polarized micro-Raman studies of femtosecond laser written stress-induced optical waveguides in diamond [PDF]
, 2018 Understanding the physical mechanisms of the refractive index modulation induced by femtosecond laser writing is crucial for tailoring the properties of the resulting optical waveguides.
A. Chiappini +11 more
core +6 more sources
Disulfide Glass: An Optical Polymer for Commodity Plastics, Precision Optics, and Photonics
Advanced Functional Materials, EarlyView.From oil and glass refining to high performance commodity polymers with enhanced thermomechanical and optical properties—the synthesis of a new high refractive index, highly transparent optical thermoset polymer is reported, termed, disulfide glass that affords a robust optical glass amenable to fabrication of precision optics and thin film photonic ...
Jake Molineux +15 more
wiley +1 more source
IEEE Access, 2020 An enriched finite element method is presented to numerically solve the eigenvalue problem on electromagnetic waveguides governed by the Helmholtz equation.
G. Padmasudha Kannan, K. V. Nagaraja
doaj +1 more source
Freeform Phononic Waveguides [PDF]
Crystals, 2017 We employ a recently introduced class of artificial structurally-disordered phononic structures that exhibit large and robust elastic frequency band gaps for efficient phonon guiding. Phononic crystals are periodic structures that prohibit the propagation of elastic waves through destructive interference and exhibit large band gaps and ballistic ...
Georgios Gkantzounis, Marian Florescu
openaire +6 more sources
Carbon Nanotube 3D Integrated Circuits: From Design to Applications
Advanced Functional Materials, EarlyView.As Moore's law approaches its physical limits, carbon nanotube (CNT) 3D integrated circuits (ICs) emerge as a promising alternative due to the miniaturization, high mobility, and low power consumption. CNT 3D ICs in optoelectronics, memory, and monolithic ICs are reviewed while addressing challenges in fabrication, design, and integration.
Han‐Yang Liu +3 more
wiley +1 more source
Optimization of the Spatial Configuration of Local Defects in Phononic Crystals for High Q Cavity
Frontiers in Mechanical Engineering, 2020 Defects can be introduced within a 2-D periodic lattice to realize phononic cavities or phononic crystal (PnC) waveguides at the ultrasonic frequency range. The arrangement of these defects within a PnC lattice results in the modification of the Q factor
Delfino Reyes +7 more
doaj +1 more source
Quantum Emitters in Hexagonal Boron Nitride: Principles, Engineering and Applications
Advanced Functional Materials, EarlyView.Quantum emitters in hexagonal boron nitride have emerged as a promising candidate for quantum information science. This review examines the fundamentals of these quantum emitters, including their level structures, defect engineering, and their possible chemical structures.
Thi Ngoc Anh Mai +8 more
wiley +1 more source
Nonlinear theory of soliton-induced waveguides
, 1998 We develop a nonlinear theory of soliton-induced waveguides that describes a finite-amplitude probe beam guided by a spatial dark soliton in a saturable nonlinear medium.
Askar’yan +16 more
core +2 more sources
Advanced Functional Materials, EarlyView.This study presents a novel donor‐bridge‐acceptor‐bridge‐donor (D‐B‐A‐B‐D) molecular system, which shows near‐unity intramolecular excitation energy transfer (IET) from two identical energy donors to a coplanar acceptor. It enables a four‐level energy system for efficient lasing at the acceptor emission band in a microspherical cavity with a low lasing
Vishal Kumar +6 more
wiley +1 more source
Dissimilar directional couplers showing -symmetric-like behavior
New Journal of Physics, 2017 Despite the benefits which the directional couplers based on parity-time symmetric systems may offer to the field of integrated optics, the realization of such couplers relies on rather strict design constraints on the waveguide parameters.
Wiktor Walasik +2 more
doaj +1 more source