UNIT-4 OCN
... In this method a laser beam is swept at a constant velocity transversely across the fiber and a measurement is made of the time interval during which the fiber intercepts the beam and casts a shadow on a photodetector. • In the apparatus shown in Figure the beam from a laser operating at a wavelengt ...
... In this method a laser beam is swept at a constant velocity transversely across the fiber and a measurement is made of the time interval during which the fiber intercepts the beam and casts a shadow on a photodetector. • In the apparatus shown in Figure the beam from a laser operating at a wavelengt ...
Chapter 7. Plane Electromagnetic Waves and Wave Propagation
... For waves incident at , the refracted wave is propagated parallel to the surface. There can be no energy flow across the surface. Hence at that angle of incidence there must be total reflection. For incident angles greater than the critical angle , Snell’s law gives ...
... For waves incident at , the refracted wave is propagated parallel to the surface. There can be no energy flow across the surface. Hence at that angle of incidence there must be total reflection. For incident angles greater than the critical angle , Snell’s law gives ...
PDF
... object along the beam axis. A focused Gaussian beam has light intensity gradients both along the beam axis and perpendicular to it. The resulting optical gradient forces pul the high-index objects towards the focus with the highest intensity, and a stable trapping is achieved when they overcome the ...
... object along the beam axis. A focused Gaussian beam has light intensity gradients both along the beam axis and perpendicular to it. The resulting optical gradient forces pul the high-index objects towards the focus with the highest intensity, and a stable trapping is achieved when they overcome the ...
Transformational Plasmon Optics Yongmin Liu, Thomas Zentgraf, Guy Bartal,
... cloaking from SPPs utilizing the interference of the fields scattered by specially arranged individual scatters.26 Nevertheless, these works demand precise control over the structure geometries and/or material properties, considerably limiting the working bandwidth. In this paper, applying the TO t ...
... cloaking from SPPs utilizing the interference of the fields scattered by specially arranged individual scatters.26 Nevertheless, these works demand precise control over the structure geometries and/or material properties, considerably limiting the working bandwidth. In this paper, applying the TO t ...
Transformational Plasmon Optics Yongmin Liu, Thomas Zentgraf, Guy Bartal,
... cloaking from SPPs utilizing the interference of the fields scattered by specially arranged individual scatters.26 Nevertheless, these works demand precise control over the structure geometries and/or material properties, considerably limiting the working bandwidth. In this paper, applying the TO t ...
... cloaking from SPPs utilizing the interference of the fields scattered by specially arranged individual scatters.26 Nevertheless, these works demand precise control over the structure geometries and/or material properties, considerably limiting the working bandwidth. In this paper, applying the TO t ...
45.Z-scan measurement of the nonlinear refractive index of graphene
... ΔΦ saturates. In this high intensity regime, the exact modeling of the nonlinear response requires us to take into account χ 3 and higher order odd terms, such as χ 5 ; …. However, from the experimental data, an effective nonlinear index can be defined by n2 I ΔΦ∕k0 LI:. One sees that n2 ...
... ΔΦ saturates. In this high intensity regime, the exact modeling of the nonlinear response requires us to take into account χ 3 and higher order odd terms, such as χ 5 ; …. However, from the experimental data, an effective nonlinear index can be defined by n2 I ΔΦ∕k0 LI:. One sees that n2 ...
Reflection optimisation of the SPR-graphene
... characterized by other factors: half width at half maximum (FWHM) and reflection minimum Rmin [5]. The evanescent waves propagating along the interface are extremely sensitive to several design parameters [7] as the metals noble [8]. Ag is one important mineral that supports the propagation of surfa ...
... characterized by other factors: half width at half maximum (FWHM) and reflection minimum Rmin [5]. The evanescent waves propagating along the interface are extremely sensitive to several design parameters [7] as the metals noble [8]. Ag is one important mineral that supports the propagation of surfa ...
Lecture 22 - MIT OpenCourseWare
... incoming light into the material. As you have seen above at intersection of any two materials with different refractive indices there is significant reflection, which is highly undesirable for the above-mentioned applications. It is possible, however to create a coating at the interface of the two m ...
... incoming light into the material. As you have seen above at intersection of any two materials with different refractive indices there is significant reflection, which is highly undesirable for the above-mentioned applications. It is possible, however to create a coating at the interface of the two m ...
Student Text, pp. 444-452
... medium remains the same (e.g., water of the same depth in both cases). Figure 11, however, shows that indexes of refraction do, in general, depend on wavelength. In Figure 11(a), the low-frequency (long-wavelength) waves are refracted, as indicated by a rod placed on the screen below the transparent ...
... medium remains the same (e.g., water of the same depth in both cases). Figure 11, however, shows that indexes of refraction do, in general, depend on wavelength. In Figure 11(a), the low-frequency (long-wavelength) waves are refracted, as indicated by a rod placed on the screen below the transparent ...
PRELIMINARY STUDY ON PHOTONIC CRYSTAL
... The beetle wing color of Eupholus Chevrolati is metallic bluish green. The color of the beetle is spread throughout the body, including the legs, arms, head and specially the body as shown in Figure 2a. The green color punctuated by black color with a distinctive pattern on the body. In this study, ...
... The beetle wing color of Eupholus Chevrolati is metallic bluish green. The color of the beetle is spread throughout the body, including the legs, arms, head and specially the body as shown in Figure 2a. The green color punctuated by black color with a distinctive pattern on the body. In this study, ...
2 Sep 2010 - at www.arxiv.org.
... optics in the analysis of subwavelength focusing. We first provide a comprehensive derivation for the equation of geodesics in curved optical spaces, which is a tool of choice to design metamaterials in transformation optics. We then analyse the resolution of the image of a line source radiating in ...
... optics in the analysis of subwavelength focusing. We first provide a comprehensive derivation for the equation of geodesics in curved optical spaces, which is a tool of choice to design metamaterials in transformation optics. We then analyse the resolution of the image of a line source radiating in ...
PRELIMINARY STUDY ON PHOTONIC CRYSTAL
... where n is refractive index, d is thickness of the material and index 1 and 2 is compiler material. In the picture 5, the value of the wavelength of the reflection spectrum is the forbidden wavelength (λgap) resulted from photonic pass band in photonic crystal. The photonic pass band in the photonic ...
... where n is refractive index, d is thickness of the material and index 1 and 2 is compiler material. In the picture 5, the value of the wavelength of the reflection spectrum is the forbidden wavelength (λgap) resulted from photonic pass band in photonic crystal. The photonic pass band in the photonic ...
Refractive-Index-Matched Indium--Tin
... indium–tin-oxide (ITO) electrodes which are used to induce a bias to the LC. The top and the bottom ITO electrodes should have properties of high optical transmittance and low sheet resistance. However, mismatch in refractive index between ITO, LC, and glass results in Fresnel reflection losses at ea ...
... indium–tin-oxide (ITO) electrodes which are used to induce a bias to the LC. The top and the bottom ITO electrodes should have properties of high optical transmittance and low sheet resistance. However, mismatch in refractive index between ITO, LC, and glass results in Fresnel reflection losses at ea ...
Diffraction at Ultrasonic Waves
... be suitable for working with high frequencies. This means that all oscillating systems with spring and mass separated, which are used for the production of sound in the hearing range, can not be used to produce ultrasound since we cannot increase their eigen frequencies above a certain value. Instea ...
... be suitable for working with high frequencies. This means that all oscillating systems with spring and mass separated, which are used for the production of sound in the hearing range, can not be used to produce ultrasound since we cannot increase their eigen frequencies above a certain value. Instea ...
Chapter 37
... This arrangement can be thought of as a double-slit source with the distance between points S and S’ comparable to length d. An interference pattern is formed. The positions of the dark and bright fringes are reversed relative to the pattern of two real sources. ...
... This arrangement can be thought of as a double-slit source with the distance between points S and S’ comparable to length d. An interference pattern is formed. The positions of the dark and bright fringes are reversed relative to the pattern of two real sources. ...
Phys 202 Midterm 1 E. Arık Fall `02 Phys 202 Midterm 1 E. Arık Fall `
... in figure. When coherent light of wavelength λ is incident from above upon the glass, 7 bright fringes are observed, as shown in figure. The air between the glass plates has index of reflection 1 , the glass plates have n › 1. what can you say about the thickness of the hair? ( I want a result of fo ...
... in figure. When coherent light of wavelength λ is incident from above upon the glass, 7 bright fringes are observed, as shown in figure. The air between the glass plates has index of reflection 1 , the glass plates have n › 1. what can you say about the thickness of the hair? ( I want a result of fo ...
Calculation of dispersion in graded-index multimode
... the information necessary to compute the impulse-response function and the pulse dispersion for a multimode graded-index fiber. It is shown that the scalar Helmholtz equation and the parabolic wave equation have the same set of eigenfunctions in common and that the eigenvalues for the two equations ...
... the information necessary to compute the impulse-response function and the pulse dispersion for a multimode graded-index fiber. It is shown that the scalar Helmholtz equation and the parabolic wave equation have the same set of eigenfunctions in common and that the eigenvalues for the two equations ...
chapter37
... change of 180° with respect to the incident ray Ray 2, which is reflected from the lower surface, undergoes no phase change with respect to the incident wave ...
... change of 180° with respect to the incident ray Ray 2, which is reflected from the lower surface, undergoes no phase change with respect to the incident wave ...
