Abstract: Disclosed herein describes an SERS sensing substrate comprising upright metal nanostructures made by using oblique angle deposition (OAD) collocating with self-rotation substrate, wherein said upright nanostructures include individual upright nanopillars and metal/dielectric multilayered upright nanopillar stacks. The SERS sensing substrate exhibits higher and enhanced adsorption spectra for unpolarized incident rays in the visible and infrared wavelength regimes.

Abstract: The invention provides a reflective phase retarder and a semiconductor light-emitting device including such reflective phase retarder. The reflective phase retarder of the invention converts an incident light beam with a first type polarization into the light with a second type polarization, and reflects the converted light beam with the second type polarization out.

Abstract: The invention provides a reflective phase retarder and a semiconductor light-emitting device including such reflective phase retarder. The reflective phase retarder of the invention converts an incident light beam with a first type polarization into the light with a second type polarization, and reflects the converted light beam with the second type polarization out.

Abstract: An optical system capable of enhancing a specific polarization state of light beam comprises a polarization beam splitter and a polarization state converter. The polarization beam splitter separates an input light beam into a first light beam of first polarization state and a second light beam of second polarization state. The first polarization state is different from the second polarization state. The second light beam is input into the polarization state converter and converted to a third light beam having significantly much more components of first polarization state. The polarization state converter has a configuration providing total reflection or high reflection function. The configuration includes at least one anisotropic optical thin film that is disposed between an incident medium of high refractive index and a medium of low refractive index.

Abstract: Disclosed herein describes an SERS sensing substrate comprising upright metal nanostructures made by using oblique angle deposition (OAD) collocating with self-rotation substrate, wherein said upright nanostructures include individual upright nanopillars and metal/dielectric multilayered upright nanopillar stacks. The SERS sensing substrate exhibits higher and enhanced adsorption spectra for unpolarized incident rays in the visible and infrared wavelength regimes.

Abstract: A phase retarder including a transparent substrate; and at least a symmetrical or pseudo symmetrical film stack stacked on the transparent substrate, the symmetrical or pseudo symmetrical film stack having odd numbers of thin film, the odd numbers of thin film having an intermediate thin film located at the center of the symmetrical or pseudo symmetrical film stack and at least one thin film located respectively on two sides of the intermediate thin film, and, with respect to the central thin film, properties of the thin films located respectively on two sides of the intermediate thin film are symmetrical or pseudo-symmetrical, there is at least one anisotropic thin film in the symmetrical or pseudo symmetrical film stack.

Abstract: An optical system capable of enhancing a specific polarization state of light beam comprises a polarization beam splitter and a polarization state converter. The polarization beam splitter separates an input light beam into a first light beam of first polarization state and a second light beam of second polarization state. The first polarization state is different from the second polarization state. The second light beam is input into the polarization state converter and converted to a third light beam having significantly much more components of first polarization state. The polarization state converter has a configuration providing total reflection or high reflection function. The configuration includes at least one anisotropic optical thin film that is disposed between an incident medium of high refractive index and a medium of low refractive index.

Abstract: The present invention presents a method to enhance polarization conversion reflection from an anisotropic thin film. The total reflection effect or the high reflection at the interface of an anisotropic thin film leads to enhanced polarization conversion. Polarization conversion is an interesting phenomenon by which a fraction of p(s)-polarized light incident on an anisotropic thin film may be reflected as s(p)-polarized light.

Abstract: The present invention presents a method to enhance polarization conversion reflection from an anisotropic thin film. The total reflection effect or the high reflection at the interface of an anisotropic thin film leads to enhanced polarization conversion. Polarization conversion is an interesting phenomenon by which a fraction of p(s)-polarized light incident on an anisotropic thin film may be reflected as s(p)-polarized light. A method that can make the anisotropic thin film generating high reflection or total reflection: (1)The reflection coefficients of the rays internally reflected inside the anisotropic film could be raised by arranging the high-refractive incident medium and the low-refractive substrate. (2) The characteristics that an anisotropic thin film with at lest two different principal indices of refraction, and the characteristics that the principal axes coordinates are not coincident with the film surface coordinates are useful for polarization conversion.