Superfluorescent rayleigh scattering from suspensions of dielectric particles.
نویسندگان
چکیده
We demonstrate that superfluorescent scattering of light can occur when laser light is incident on a collection of dielectric Rayleigh particles suspended in a viscous medium. Using a linear stability analysis, an expression for the spatiotemporal evolution of the scattered (probe) field is derived. An approximate condition for the progression of the interaction into the nonlinear regime is deduced and it is shown that, in the nonlinear regime, the scattered field intensity shows the characteristic quadratic dependence on particle density expected from a superfluorescent or superradiant process, once the effects of pump depletion are accounted for.
منابع مشابه
Hyper-Rayleigh scattering studies of silver, copper, and platinum nanoparticle suspensions
The optical frequency doubling properties of silver, copper, and platinum nanoparticles in aqueous solution are studied via hyper-Rayleigh scattering (HRS) spectroscopy. Substantial HRS responses are observed for silver and copper particles. The response is attributed to enhancement due to resonance of the nonlinearly scattered light with the particles’ surface plasmon absorption band. Platinum...
متن کاملAngle-resolved second-harmonic light scattering from colloidal particles.
We report angle-resolved second-harmonic generation (SHG) measurements from suspensions of centrosymmetric micron-size polystyrene spheres with surface-adsorbed dye (malachite green). The second-harmonic scattering profiles differ qualitatively from linear light scattering profiles of the same particles. We investigated these radiation patterns using several polarization configurations and part...
متن کاملOn the Validity of Modeling Rayleigh Scatterers by Spheroids
For single homogeneous lossy dielectric Rayleigh particles, the manner in which the particle shape affects the absorption and scattering is examined by computing the polarizability tensor elements using a general purpose program valid for any rotationally symmetric body. The results for a number of generic shapes are compared with those for the corresponding spheroids. When the dielectric const...
متن کاملDetermination of Closed-form Expressions for Rayleigh Scattering of Polarized Light from Adsorbed Particles on or below a Substrate
An integral equation formulation describing the scattered field from a distribution of optically small Rayleigh objects of arbitrary shape adsorbed onto a planar dielectric substrate is presented. When certain approximations are introduced concerning the scatterers’ permittivity contrast and small size compared to the wavelength, simple closed-form expressions are obtained for the ellipticity r...
متن کاملHyper-rayleigh Scattering and Surface-enhanced Raman Scattering Studies of Platinum Nanoparticle Suspensions
Platinum nanoparticles (ptNPs) in the water are synthesized by nanosecond pulsed laser ablation of a pure platinum plate in the distilled water. Using hyper-Rayleigh scattering (HRS) spectroscopy is observed considerable HRS responses. Pt nanoparticles do not have visible-region plasmon absorption, do not represent clear HRS signals, whereas surprisingly, they exhibit strong surface-enhanced Ra...
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 90 12 شماره
صفحات -
تاریخ انتشار 2003