This article describes a study, using numerical simulation, of the optical properties of nano particles as a function of their size. Many methods introduced to simulate and calculate the interaction of light and particle, such as Mie analysis, boundary element and finite element methods. The Discrete Dipole Approximation (DDA), wherein a target geometry is modeled as a ...

We present a proposal for a X-ray optical element suitable for X-ray microscopy and other X-ray-based display systems. Its principle is based on the Fresnel lenses condition and the Bragg condition for X– ray scattering on a slice of monocrystal. These conditions are fulfilled simultaneously due to a properly machined shape of the monocrystal with a stress at its ends.

Theoretical performance and preliminary experimental verification of a twotelescope optical array receiver, currently under development at the Jet Propulsion Laboratory as part of a research and technology development effort, is described in this article. A brief summary of optical communications theory for array reception of pulsed laser signals is developed, and the application of coding to o...

In Agilent’s Photonic Switching Platform, resistive heaters control tiny bubbles enabling all-optical switching. This paper reports on the addition of more efficient laser-activated heaters. Measurements confirm improvements in power dissipation and insertion loss stability. Introduction In Agilent’s approach to photonic cross-connect switching [1], a fused silica planar lightwave circuit (PLC)...

We consider generation of a perfect optical vortex by three elements: (i) amplitude-phase element with its transmission being proportional to the Bessel function, (ii) optimal element with the transmission proportional to the sign of the Bessel function, and (3) helical axicon. Maximal intensity of light on the ring is shown to be achieved by using the optimal element. Thickness of the light ri...

A chip architecture that integrates an optical sensor and a pixel level processing element based on binary stochastic arithmetic is proposed. The optical sensor is formed by an array of fully connected pixels, and each pixel contains a sensing element and a Pulse Frequency Modulator (PFM) converting the incident light to bit streams of identical pulses. The processing element is based on binary...

We introduce a novel polarizing beam splitter that uses the anisotropic spectral reflectivity (ASR) characteristic of a high-spatial-frequency multilayer binary grating. Such ASR effects allow us to design an optical element that is transparent for TM polarization and reflective for TE polarization. For normally incident light our element acts as a polarization-selective mirror. The properties ...

An adaptive optical system for precise control of a laser beam's mode structure has been developed. The system uses a dynamic lens based on controlled optical path deformation in a dichroic optical element that is heated with an auxiliary laser. Our method is essentially aberration free, has high dynamic range, and can be implemented with high average power laser beams where other adaptive opti...

We analyze optical phased arrays with aperiodic pitch and element-to-element spacing greater than one wavelength at channel counts exceeding hundreds of elements. We optimize the spacing between waveguides for highest side-mode suppression providing grating lobe free steering in full visible space while preserving the narrow beamwidth. Optimum waveguide placement strategies are derived and desi...

We describe the design of Fourier type array generators and beam shapers as periodic configurations refractive-diffractive optical elements in microscale to provide specific shaping imaging functionaliies. investigate how addition micro-nanostructures regular microstructure arrays enables new degrees freedom for micro-optical systems, combination with adapted fabrication techniques yields a bet...