Gaussian beams scatt e red from di ¤ erent materials
نویسندگان
چکیده
Investigating spherical nano-particles by illumination of Gaussian beam was studied. In order to simulate the scattering e¤ect new software simulation based on the Bromwich formulation and the Mie theory was developed. The scattering simulation enables us to examine the scattered eld a¤ected by the particle size and material composition. Studying the scattered elds yielded sensors con guration which has the ability to di¤erentiate between particles made of di¤erent materials.
منابع مشابه
Lossless tapers, Gaussian beams, free-space modes: Standing waves versus through- ̄owing waves
It was noticed in the past that, to avoid physical inconsistencies, some basic features of waves ̄owing through Marcatili's lossless tapers must be dierent from those of standing waves in the same structures. In this paper, we ®rst present numerical results (based on an extended BPM algorithm) which recon®rm this statement. Next, we explain this surprising behavior as straightforward consequenc...
متن کاملToroidal Optical Dipole Traps for Atomic Bose-Einstein Condensates using Laguerre-Gaussian Beams
We theoretically investigate the use of red-detuned Laguerre-Gaussian (LG) laser beams of varying azimuthal mode index for producing toroidal optical dipole traps in two-dimensional atomic Bose-Einstein condensates. Higherorder LG beams provide deeper potential wells and tighter confinement for a fixed toroid radius and laser power. Numerical simulations of the loading of the toroidal trap from...
متن کاملMicrobial Ecology of Retail Ready-to-Eat Escarole and Red Chicory Sold in Palermo City, Italy
Background: Ready-To-Eat (RTE) foods include any edible food that is commonly consumed raw. This study aimed at evaluation of microbial ecology of retail RTE escarole and red chicory sold in Palermo city, Italy. Methods: A total of 32 mono-varietal RTE samples, including escarole (n=16) and red chicory (n=16) samples were obtained from Palermo, Italy. Both RTE vegetables at expiry date were an...
متن کاملA comparison of hybrid HMM architectures using global discriminative training
This paper presents a comparison of di erent model architectures for TIMIT phoneme recognition. The baseline is a conventional diagonal covariance Gaussian mixture HMM. This system is compared to two di erent hybrid MLP/HMMs, both adhering to the same restrictions regarding input context and output states as the Gaussian mixtures. All free parameters in the three systems are jointly optimised u...
متن کاملCooling and Heating of Crystalline Ion Beams
U S hramm z, T S hatz x, M Bussmann, D Habs Sektion Physik, Ludwig-Maximilians-Universit at M un hen, D-85748 Gar hing, Germany E-mail: ulri h.s hramm physik.uni-muen hen.de Abstra t. The rystallization of ion beams has re ently been established in the rf quadrupole storage ring Pallas for laserooled 24Mg+ ion beams at an energy of about 1 eV. Yet, unexpe tedly sharp onstraints had to be met...
متن کامل