Theory of the transmission properties of an optical far-field superlens
... transmitted and incident transverse wavenumbers, respectively; ⌳ = 2 / d is the grating wavenumber, where d is the periodicity; and p is the diffraction order. We are interested only in waves transmitted in the far field, i.e., far enough from the FSL and the object plan that the contribution of ev ...
... transmitted and incident transverse wavenumbers, respectively; ⌳ = 2 / d is the grating wavenumber, where d is the periodicity; and p is the diffraction order. We are interested only in waves transmitted in the far field, i.e., far enough from the FSL and the object plan that the contribution of ev ...
the electromagnetic pulse and its effects
... yield at a sufficient altitude, the area covered by the high-frequency EMP extends in all directions on the ground as far as the line-of-sight, i.e., to the horizon, from the burst point (see Fig. 11.13). The lower frequencies will constitute a significant pulse extending even beyond the horizon. Fo ...
... yield at a sufficient altitude, the area covered by the high-frequency EMP extends in all directions on the ground as far as the line-of-sight, i.e., to the horizon, from the burst point (see Fig. 11.13). The lower frequencies will constitute a significant pulse extending even beyond the horizon. Fo ...
Subnanometer-accuracy optical distance ruler based on fluorescence quenching by transparent conductors R
... over a few to a few tens of molecules per measurement while avoiding self-quenching. We note that quantum dots are less suited to probe the predicted lifetime decrease because of their intrinsic size and because additional phenomena like charge transfer and photobrightening may occur simultaneously ...
... over a few to a few tens of molecules per measurement while avoiding self-quenching. We note that quantum dots are less suited to probe the predicted lifetime decrease because of their intrinsic size and because additional phenomena like charge transfer and photobrightening may occur simultaneously ...
An Improved Microwave Weed Killer
... like any microwave oven. The operation of the magnetron is pulsed with a large duty cycle of approximately 40 percent at the 50 Hz frequency. Because of the large overall power, approaching 15 kVA, due to the reactive loading of the magnetic-shunt transformers, a three-phase 400 V AC, 50 Hz supply w ...
... like any microwave oven. The operation of the magnetron is pulsed with a large duty cycle of approximately 40 percent at the 50 Hz frequency. Because of the large overall power, approaching 15 kVA, due to the reactive loading of the magnetic-shunt transformers, a three-phase 400 V AC, 50 Hz supply w ...
Fields and Waves I Lecture - Rensselaer Polytechnic Institute
... subjected to a strong magnetic field, it becomes optically active. The effect occurs when the rotation of a linearly polarized wave passes through a thickness of a transparent medium. The beam should be plane polarized, that is, it can pass through an analyzer without attenuation only when its axis ...
... subjected to a strong magnetic field, it becomes optically active. The effect occurs when the rotation of a linearly polarized wave passes through a thickness of a transparent medium. The beam should be plane polarized, that is, it can pass through an analyzer without attenuation only when its axis ...
Light scattering by multiple red blood cells
... Fig. 3(a) for two orthogonal polarizations, one with ˆ ⫽ x̂, i.e., with the electric field in the x̂ direction, and the other with ˆ ⫽ ŷ [see Eq. (1)]. The scattering probability patterns are shown in Fig. 5. Since the scattering probability [see Eq. (2)] is an averaged value over the azimuthal a ...
... Fig. 3(a) for two orthogonal polarizations, one with ˆ ⫽ x̂, i.e., with the electric field in the x̂ direction, and the other with ˆ ⫽ ŷ [see Eq. (1)]. The scattering probability patterns are shown in Fig. 5. Since the scattering probability [see Eq. (2)] is an averaged value over the azimuthal a ...
Shaping the focal intensity distribution using spatial coherence
... Although light encountered under many practical circumstances is partially coherent, the intensity near focus of such wave fields has been studied in relatively few cases [1–5]. The correlation properties of focused partially coherent fields have been examined in [6,7], where it was shown that the c ...
... Although light encountered under many practical circumstances is partially coherent, the intensity near focus of such wave fields has been studied in relatively few cases [1–5]. The correlation properties of focused partially coherent fields have been examined in [6,7], where it was shown that the c ...
Initial demonstration of a local, evanescent, array coupled biosensor concept
... topography image over a 10 µm × 100 µm scanned area based on surface height information. The waveguide width appears slightly larger than 2 µm because of the finite NSOM tip size. Light is coupled into the waveguide approximately 4mm to the left of the area shown. The three regions of the waveguide ...
... topography image over a 10 µm × 100 µm scanned area based on surface height information. The waveguide width appears slightly larger than 2 µm because of the finite NSOM tip size. Light is coupled into the waveguide approximately 4mm to the left of the area shown. The three regions of the waveguide ...
ALMA Newsletter N°5
... the size of the diffraction pattern of the two sources. In the opposite case, the two diffraction patterns will smear out in single blob. The minimum separation angle that two sources must have in order to be separated by a telescope only depends on one quantity: the ratio between the wavelength of ...
... the size of the diffraction pattern of the two sources. In the opposite case, the two diffraction patterns will smear out in single blob. The minimum separation angle that two sources must have in order to be separated by a telescope only depends on one quantity: the ratio between the wavelength of ...
Split-field finite-difference time-domain method for second-harmonic generation in two-dimensionally periodic structures
... Recently, the applications of nonlinear optics in communications, optical computing, and photonic crystal structures have been extensively investigated in the literature [1–7]. Nonlinear-optical materials reach different phenomena such as all-optical control of electromagnetic waves or all-optical s ...
... Recently, the applications of nonlinear optics in communications, optical computing, and photonic crystal structures have been extensively investigated in the literature [1–7]. Nonlinear-optical materials reach different phenomena such as all-optical control of electromagnetic waves or all-optical s ...
wf111 – 802.11 b/g/n module
... Control of when the module is allowed to enter deep sleep is done via Vendor Unique Register in CCCR in function 0. Wake-up is also initiated through this register. The module will initiate an SDIO interrupt when the wake-up is complete. ...
... Control of when the module is allowed to enter deep sleep is done via Vendor Unique Register in CCCR in function 0. Wake-up is also initiated through this register. The module will initiate an SDIO interrupt when the wake-up is complete. ...
HRPT Data Capture Engine Installation Guide
... pedestals and optional electronics for Seastar and Feng Yun reception. Customer supplied equipment includes an appropriate 3.5” OD schedule 40 steel pole to mount the antenna system and an appropriately configured IBM compatible personal computer to control the system and capture and store data. Cur ...
... pedestals and optional electronics for Seastar and Feng Yun reception. Customer supplied equipment includes an appropriate 3.5” OD schedule 40 steel pole to mount the antenna system and an appropriately configured IBM compatible personal computer to control the system and capture and store data. Cur ...
Effective Area of Optical Fibres
... little resemblance to the refractive index profile and therefore the area of the doped core region itself does not truly represent the area of the mode field. The effective area, Aeff, of the mode must be calculated from the field distribution but since this falls gradually to zero away from the fib ...
... little resemblance to the refractive index profile and therefore the area of the doped core region itself does not truly represent the area of the mode field. The effective area, Aeff, of the mode must be calculated from the field distribution but since this falls gradually to zero away from the fib ...
Upholding the diffraction limit in the focusing of light and sound
... photometric) the presence of two objects of much smaller angular separation than indicated by Rayleigh’s criterion may often be revealed.” Indeed, if any number of photons is available for the measurement, there is no fundamental limit to how well one can resolve two point sources, since it is possi ...
... photometric) the presence of two objects of much smaller angular separation than indicated by Rayleigh’s criterion may often be revealed.” Indeed, if any number of photons is available for the measurement, there is no fundamental limit to how well one can resolve two point sources, since it is possi ...
Baluns: Choosing the Correct Balun
... and opposite currents on the shield and center conductors. Equal and opposite currents can only flow inside the shield. Coaxial line shields also must have zero volts radio-frequency electrical potential to "ground" or space around the line at the operating frequency. Deviations from this ideal case ...
... and opposite currents on the shield and center conductors. Equal and opposite currents can only flow inside the shield. Coaxial line shields also must have zero volts radio-frequency electrical potential to "ground" or space around the line at the operating frequency. Deviations from this ideal case ...
Holograms for shaping radio
... A scheme of the two-dimensional FDTD simulation is shown in figure 4. The simulation domain is divided into cells: within each cell, local and time-dependent electric and magnetic fields are computed with Maxwell’s equations using the central-difference approximation. In the two-dimensional FDTD sim ...
... A scheme of the two-dimensional FDTD simulation is shown in figure 4. The simulation domain is divided into cells: within each cell, local and time-dependent electric and magnetic fields are computed with Maxwell’s equations using the central-difference approximation. In the two-dimensional FDTD sim ...
Subwavelength transportation of light with atomic resonances
... more and more difficult to render ky2 negative to localize the electromagnetic wave. Mathematically we find that the imaginary part of the resonance frequency increases when the lattice spacing becomes very small. In this case, it becomes impossible to reduce the radiative loss as described in Appen ...
... more and more difficult to render ky2 negative to localize the electromagnetic wave. Mathematically we find that the imaginary part of the resonance frequency increases when the lattice spacing becomes very small. In this case, it becomes impossible to reduce the radiative loss as described in Appen ...
An optical leaky wave antenna with Si perturbations inside a
... spatial harmonic [4] with wavenumber k x , −1 = β −1 + i α , with β −1 = β 0 − 2π / d where β 0 is the fundamental wavenumber in the perturbed waveguide. When using small perturbations the value of β 0 is close to that of the mode wavenumber β in the unperturbed (i.e., without Si perturbations) wave ...
... spatial harmonic [4] with wavenumber k x , −1 = β −1 + i α , with β −1 = β 0 − 2π / d where β 0 is the fundamental wavenumber in the perturbed waveguide. When using small perturbations the value of β 0 is close to that of the mode wavenumber β in the unperturbed (i.e., without Si perturbations) wave ...
A UHF RFID Printed Circuit Board Solution
... more information (they take more space), but require expensive scanning equipment and accurate optical alignment between the label and scanner. This can decrease the automatic tracking functionality along with increasing the setup time needed when switching from one assemble to another. Since barcod ...
... more information (they take more space), but require expensive scanning equipment and accurate optical alignment between the label and scanner. This can decrease the automatic tracking functionality along with increasing the setup time needed when switching from one assemble to another. Since barcod ...
Get PDF - OSA Publishing
... fixed. The physics mechanism is rather clear and can be qualitatively explained as follows. By applying the EPF to driving the transitions j1i↔j2i and j4i↔j2i, the absorption of the probe field applied to the transition j2i↔j3i and the Kerr nonlinearity of the atomic system can be modified, which le ...
... fixed. The physics mechanism is rather clear and can be qualitatively explained as follows. By applying the EPF to driving the transitions j1i↔j2i and j4i↔j2i, the absorption of the probe field applied to the transition j2i↔j3i and the Kerr nonlinearity of the atomic system can be modified, which le ...
RFID Coil Design
... • To receive data signals from the tag An RF signal can be radiated effectively if the linear dimension of the antenna is comparable with the wavelength of the operating frequency. In an RFID application utilizing the VLF (100 kHz – 500 kHz) band, the wavelength of the operating frequency is a few k ...
... • To receive data signals from the tag An RF signal can be radiated effectively if the linear dimension of the antenna is comparable with the wavelength of the operating frequency. In an RFID application utilizing the VLF (100 kHz – 500 kHz) band, the wavelength of the operating frequency is a few k ...
Near and far field
The near field (or near-field) and far field (or far-field) are regions of the electromagnetic field around an object, such as a transmitting antenna, or the result of radiation scattering off an object. Non-radiative 'near-field' behaviors of electromagnetic fields dominate close to the antenna or scattering object, while electromagnetic radiation 'far-field' behaviors dominate at greater distances. Far-field E and B field strength decreases inversely with distance from the source, resulting in an inverse-square law for the radiated power intensity of electromagnetic radiation. By contrast, near-field E and B strength decrease more rapidly with distance (with inverse-distance squared or cubed), resulting in relative lack of near-field effects within a few wavelengths of the radiator.