Observation of two-dimensional spatial solitary waves in a quadratic medium.
نویسندگان
چکیده
We report the first experimental demonstration of two-dimensional spatial solitary waves in secondorder nonlinear optical material. When an intense optical beam is focused into a phase-matchable second-order nonlinear material, the fundamental and generated second-harmonic fields are mutually trapped as a result of the strong nonlinear coupling which counteracts both diffraction and beam walkoff.
منابع مشابه
Stability of Three-Wave Parametric Solitons in Diffractive Quadratic Media.
Analysis of wave interaction in nonlinear media is a fundamental problem of nonlinear physics. Resonant interaction is especially interesting since it leads to an energy exchange between waves of different carrier frequencies. In a medium without the center of symmetry, quadratic nonlinearity results in parametric three-wave mixing when two waves create a third wave at a combined frequency v3 ...
متن کاملBreak-up of two-dimensional bright spatial solitons due to transverse modulation instability
– We present the theory and the experimental observation of break-up of twodimensional bright spatial solitons propagating in a three-dimensional bulk photorefractive nonlinear medium due to transverse modulation instability. Solitary wave (self-bound) solutions of nonlinear propagation equations are a fascinating topic of nonlinear dynamics. The analysis of their stability and nonlinear evolut...
متن کاملModel Equations for Gravity-capillary Waves in Deep Water
The Euler equations for water waves in any depth have been shown to have solitary wave solutions when the effect of surface tension is included. This paper proposes three quadratic model equations for these types of waves in infinite depth with a two-dimensional fluid domain. One model is derived directly from the Euler equations. Two further simpler models are proposed, both having the full gr...
متن کاملGeneration of a train of three-dimensional optical solitons in a self-focusing medium.
The problem of modulation instability of a self-focused beam in a homogeneous nonlinear medium with saturation and anomalous group-velocity dispersion is solved numerically. It is shown that the results of this instability is beam breakup into a periodic train of three-dimensional (3D) spatial solitary waves. It is also shown that other types of periodic initial conditions can produce a periodi...
متن کاملTwo-dimensional solitary waves in media with quadratic and cubic nonlinearity
We determine the existence and stability regimes of bright 211-dimensional spatial solitary waves in media with quadratic ~or x ! and focusing cubic nonlinearities. We derive a necessary criterion for linear stability of these solitons, and use it to show that the quadratic nonlinearity enables stable solitons to exist when the cubic nonlinearity is sufficiently weak. We discuss why the Vakhito...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Physical review letters
دوره 74 25 شماره
صفحات -
تاریخ انتشار 1995