Anisotropic charge displacement supporting isolated photorefractive optical needles.
نویسندگان
چکیده
Strong asymmetry in the charge distribution supporting a single noninteracting spatial needle soliton in a paraelectric photorefractive is directly observed by means of electroholographic readout. Whereas in trapping conditions a quasi-circular wave is supported, the underlying double-dipolar structure can be made to support two distinct propagation modes.
منابع مشابه
Direct Imaging of Anisotropic Material Properties using Photorefractive Laser Ultrasound
Anisotropic properties of materials can be determined by measuring the propagation of elastic waves in different directions. A laser imaging approach is presented that utilizes the adaptive property of photorefractive materials to produce a real-time measurement of the antisymmetric Lamb or flexural traveling wave mode displacement and phase. Continuous excitation is employed and the data is re...
متن کاملرفتار نورشکستی بلور تیتانات باریم و کاربردهای آن در اندازه گیریهای اپتیکی در زمان واقعی
In this research we measure some of the optical parameters of Barium Titanate crystal (BaTiO3), such as signal beam gain, coupling constant (exponential gain coefficient), change in index refraction and photorefractive sensitivity, which are very significant for optical data storage. In all experiment, two- wave mixing configuration at 632.8 nm (He- Ne laser) were used. Experimental data f...
متن کاملPropagation of a mutually incoherent optical vortex pair in anisotropic nonlinear media
We study propagation of a pair of oppositely charged and mutually incoherent vortices in anisotropic nonlinear optical media. Mutual interactions retard the delocalization of the vortex core observed for isolated vortices.
متن کاملResidual Force Enhancement in Mechanically Isolated Half-sarcomeres
Our goal was to test if half-sarcomeres produce force enhancement after stretch. Single myofibrils from rabbit psoas were placed in a temperature-controlled (10°C) bath, where half-sarcomeres were isolated using two precalibrated glass micro-needles. The force produced during activation of the half-sarcomere was measured by tracking the displacement of the micro-needles. The half-sarcomere leng...
متن کاملSpatial soliton pairs in an unbiased photovoltaic-photorefractive crystal circuit
: Optical separate spatial dark and bright soliton pairs in steady-state case in one dimension, for a series circuit consisting of two-photon photorefractive (PR) crystal are investigated. Each crystal can be supported the spatial soliton, and at least one must be photovoltaic. The two solitons are known collectively as separate spatial soliton pairs with dark–dark, bright–dark and bright–brigh...
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:
- Optics letters
دوره 26 12 شماره
صفحات -
تاریخ انتشار 2001