Aberration-Free Ultrathin Flat Lenses and Axicons at Telecom
... 0.5°. The devices are fabricated by patterning one face of a double-side-polished undoped silicon wafer with gold nanoantennas using electron beam lithography (EBL). The antenna arrays were surrounded by an opaque mask (15 nm titanium and 200 nm silver), which completely reflects the fraction of the ...
... 0.5°. The devices are fabricated by patterning one face of a double-side-polished undoped silicon wafer with gold nanoantennas using electron beam lithography (EBL). The antenna arrays were surrounded by an opaque mask (15 nm titanium and 200 nm silver), which completely reflects the fraction of the ...
Electromagnetically induced transparency
... Two general detection protocols of optical biosensors 1. Fluorescence-based detection Intensity of the fluorescence: the number of target molecules Extremely sensitive, down to a single molecule detection (1) Suffers from laborious labeling processes, that may also interfere with the function of a ...
... Two general detection protocols of optical biosensors 1. Fluorescence-based detection Intensity of the fluorescence: the number of target molecules Extremely sensitive, down to a single molecule detection (1) Suffers from laborious labeling processes, that may also interfere with the function of a ...
Nonlinear optical responses and gap
... (Dated: February 8, 2008) A new approach to the nonlinear reponse of a multiplayer structure consisting of alternating dielectric materials with intensity-dependent dielectric constants is considered in both analytical and numerical viewpoints. The nonlinear feedback of the structure gives rise to a ...
... (Dated: February 8, 2008) A new approach to the nonlinear reponse of a multiplayer structure consisting of alternating dielectric materials with intensity-dependent dielectric constants is considered in both analytical and numerical viewpoints. The nonlinear feedback of the structure gives rise to a ...
Direct Patterning of Three-Dimensional Periodic
... however, it has been shown that periodic nanostructures, like hole or aperture arrays, on metal films provide momentum compensation, which allows light-SP conversion and manipulation of light at subwavelength scales.15 In fact, this phenomenon has been used to overcome the diffraction limit of tradi ...
... however, it has been shown that periodic nanostructures, like hole or aperture arrays, on metal films provide momentum compensation, which allows light-SP conversion and manipulation of light at subwavelength scales.15 In fact, this phenomenon has been used to overcome the diffraction limit of tradi ...
Inverse scattering for frequency-scanned full-field
... within a coherence length of the focal plane produce scattered fields that will interfere with the reference. By recording the interference, an image of a slice of the sample around the focal plane is obtained, and the out-of-focus contributions are removed by coherence gating. The usual technique i ...
... within a coherence length of the focal plane produce scattered fields that will interfere with the reference. By recording the interference, an image of a slice of the sample around the focal plane is obtained, and the out-of-focus contributions are removed by coherence gating. The usual technique i ...
Lec02 - nptel
... directions and light waves would travel spherically outwards from the source of light. If we now draw lines perpendicular to these phase-fronts at any point, these lines would give the direction of flow of light energy at that point and the line drawn would then be called a light ray. Due to their s ...
... directions and light waves would travel spherically outwards from the source of light. If we now draw lines perpendicular to these phase-fronts at any point, these lines would give the direction of flow of light energy at that point and the line drawn would then be called a light ray. Due to their s ...
Second-harmonic generation
... Under normal conditions the response of a medium to light is linear and as a consequence most optical phenomena can be described with a linear refractive index. It was only with the invention of lasers in the early 1960’s that the available optical power level increased to a level where the response ...
... Under normal conditions the response of a medium to light is linear and as a consequence most optical phenomena can be described with a linear refractive index. It was only with the invention of lasers in the early 1960’s that the available optical power level increased to a level where the response ...
Optical measurement of the axial eye length by laser Doppler
... These fringes can be seen with the infrared (IR) scope. In principle, the eye length can be measured by a shift of one of the interferometer plates in steps of CL/2. At the position where the fringes are seen, d is measured and OL = d ± CL/2. Actually, the first measurements of the eye length, with ...
... These fringes can be seen with the infrared (IR) scope. In principle, the eye length can be measured by a shift of one of the interferometer plates in steps of CL/2. At the position where the fringes are seen, d is measured and OL = d ± CL/2. Actually, the first measurements of the eye length, with ...
The generation of nondiffracting beams using
... propagation direction, say, z. Both functions are in general complex. For nondiffracting beams the transverse field is independent of z. The longitudinal field depends only on z, and it does so such that only the phase of the wavefield varies © 2007 American Association of Physics Teachers ...
... propagation direction, say, z. Both functions are in general complex. For nondiffracting beams the transverse field is independent of z. The longitudinal field depends only on z, and it does so such that only the phase of the wavefield varies © 2007 American Association of Physics Teachers ...
Molecules To Materials
... orthogonal to each other. This leads to a noncentric lattice and hence SHG capability. Urea is perhaps the simplest molecular material capable of efficient SHG; it is used as a reference for comparing the SHG of other organic compounds, expressed in units of U. The case of nitroanilines provides a g ...
... orthogonal to each other. This leads to a noncentric lattice and hence SHG capability. Urea is perhaps the simplest molecular material capable of efficient SHG; it is used as a reference for comparing the SHG of other organic compounds, expressed in units of U. The case of nitroanilines provides a g ...
1.9 W yellow, CW, high-brightness light from a high efficiency
... The setup for obtaining efficient frequency doubling of the NIR light is sketched in figure 1. The laser diode is described in18. It is mounted p-side up and has two contacts for controlling injection current: One for the ridge waveguide section and one for the tapered amplifier section. A distribut ...
... The setup for obtaining efficient frequency doubling of the NIR light is sketched in figure 1. The laser diode is described in18. It is mounted p-side up and has two contacts for controlling injection current: One for the ridge waveguide section and one for the tapered amplifier section. A distribut ...
Dispersion Compensation using a Prism-pair
... The generation of ultrashort pulses [1, 2] revolutionized the field of molecular spectroscopy [3]. Not only that ultrashort pulses enable to observe molecular motion in time [4, 5, 6], but they allow also to manipulate their dynamics [7, 8, 9] by controlling the spectral properties of the pulses. Fo ...
... The generation of ultrashort pulses [1, 2] revolutionized the field of molecular spectroscopy [3]. Not only that ultrashort pulses enable to observe molecular motion in time [4, 5, 6], but they allow also to manipulate their dynamics [7, 8, 9] by controlling the spectral properties of the pulses. Fo ...
Dunlap Institute Summer School: Fourier Transform Spectroscopy Lab
... with a ruler that the mirror is approximately the same distance from the beamsplitter face as the fixed mirror. Mount a 1-inch spacer in the direction of the second laser path, parallel to the long side of the optical plate. Next add the translation stage using 0.5-inch screws - this will only work ...
... with a ruler that the mirror is approximately the same distance from the beamsplitter face as the fixed mirror. Mount a 1-inch spacer in the direction of the second laser path, parallel to the long side of the optical plate. Next add the translation stage using 0.5-inch screws - this will only work ...
5000176793-5000311155-1-SP - Gazi University Journal of
... behaviors [3] when doped with some transition-metal ions. Meziani and Belkhir used density functional theory (DFT) to calculate structural, electronic and elastic properties of CsCaF3 compounds.[4] Veeraiah et al. studied electronic structure and optical properties of CsCaF3 compounds using full pot ...
... behaviors [3] when doped with some transition-metal ions. Meziani and Belkhir used density functional theory (DFT) to calculate structural, electronic and elastic properties of CsCaF3 compounds.[4] Veeraiah et al. studied electronic structure and optical properties of CsCaF3 compounds using full pot ...
Automated Mode-Matching of Gaussian Beams
... higher energy is attributed to the solution and thus added to the overall energy of the solution. Next we compare the final waist resulting from the third lens to the desired waist supplied by the user at the beginning of the program. A difference is taken between the two and is added respectively t ...
... higher energy is attributed to the solution and thus added to the overall energy of the solution. Next we compare the final waist resulting from the third lens to the desired waist supplied by the user at the beginning of the program. A difference is taken between the two and is added respectively t ...
PDF
... All samples were evaluated 30 min after the preparation under the microscope BX-50 Olympus capable of two methods of observation, a regular polarized microscopy to evaluate light transmittance It ðRÞ and the fluorescence microscopy to identify the labelled beads, Figure 3A, C, E. The polarising micr ...
... All samples were evaluated 30 min after the preparation under the microscope BX-50 Olympus capable of two methods of observation, a regular polarized microscopy to evaluate light transmittance It ðRÞ and the fluorescence microscopy to identify the labelled beads, Figure 3A, C, E. The polarising micr ...
Tunable External-Cavity High
... General Overview • For experiments in which spin polarized 3He is needed, lasers tuned to circularly polarized 795 nm light are used to optically pump Rb atoms into states that exchange spin with 3He nuclei through collisions. ...
... General Overview • For experiments in which spin polarized 3He is needed, lasers tuned to circularly polarized 795 nm light are used to optically pump Rb atoms into states that exchange spin with 3He nuclei through collisions. ...
A method for characterizing longitudinal chromatic aberration of
... source and detector pinholes are correctly positioned such that their images, in object space, lie exactly on top of each other with no relative spatial displacement. If this is achieved a very sharp effective point spread function with ...
... source and detector pinholes are correctly positioned such that their images, in object space, lie exactly on top of each other with no relative spatial displacement. If this is achieved a very sharp effective point spread function with ...
Experimental implementation of the gyrator transform - E
... the common 4-f system—a cascade of two Fourier transforming systems—is obtained. Therefore the proposed gyrator system can be considered as a generalization of the well-known optical processing 4-f system to the case of the generalized lenses. In Fig. 3 the detailed scheme of the GT optical setup is ...
... the common 4-f system—a cascade of two Fourier transforming systems—is obtained. Therefore the proposed gyrator system can be considered as a generalization of the well-known optical processing 4-f system to the case of the generalized lenses. In Fig. 3 the detailed scheme of the GT optical setup is ...
Optical tweezers
Optical tweezers (originally called ""single-beam gradient force trap"") are scientific instruments that use a highly focused laser beam to provide an attractive or repulsive force (typically on the order of piconewtons), depending on the refractive index mismatch to physically hold and move microscopic dielectric objects similar to tweezers. Optical tweezers have been particularly successful in studying a variety of biological systems in recent years.