Nonlinear hybrid plasmonic slot waveguide for second-harmonic generation

Abstract

A nonlinear hybrid plasmonic slot waveguide composed of periodically poled lithium niobate (PPLN) and two separated silver films is investigated. The effective refractive index, propagation length, and energy confinement of the hybrid anti-symmetric mode in this waveguide are calculated using the structure parameters at the fundamental wavelength of λ = 1550 nm and its second harmonic (SH) λ = 775 nm. Through the above indices, coupling efficiency (maximum SH conversion efficiency during propagation) and peak position (propagation location of the conversion efficiency) of SH generation are analyzed. Finally, higher conversion efficiency can be achieved at a shorter propagation distance by changing the waveguide into a tapered structure.

Crystal growth, spectroscopic characterization and laser performance of Tm/Mg:LiNbO3crystal

“…The excellent combination of electro-optical, acoustooptical and nonlinear optical properties of lithium niobate (LiNbO 3 , LN), combined with the possibility of rare-earth doping, makes this host an attractive material for application in integrated optics [10][11][12][13][14][15][16]. Laser action at 1.85 µm in Tm:LN was first demonstrated at 77 K 43 years ago in a bulk-doped sample [3].…”

Ultranarrow bandwidth tunable atomic filter via quantum interference-induced polarization rotation in Rb vapor

“…Narrowband optical filter is an essential tool to extract useful signals from a noisy background. Different approaches have been used to achieve a narrowband optical filter, such as multiple cavity optical filters [1,2] , microresonator filters [3] , filters based on stimulated Brillouin scattering in optical fibers [4] , and atomic filters [5] . Atomic filters based on magneto-optic effects [6] have been studied extensively, with the merits of narrow bandwidth, high transmission, and excellent noise rejection ability.…”

Experimental study of unidirectional excitation of SPPs by binary area-coded nanohole arrays

“…In various plasmonic applications nowadays, such as plasmonic circuitry, unidirectional beaming [1−3] , second harmonic generation [4] , and sensing [5,6] , the efficient excitation and steering of surface plasmon polaritons (SPPs) are of great importance. The SPP launchers are such devices that can couple and convert the energy of free-space propagating light into the SPPs confined on a metal surface.…”