光学OPTICS教学课件：第五章光的偏振1

1、光 学,OPTICS,第五章 光的偏振,Propagation of light in linear anisotropic dielectrics (crystals,第五章 光的偏振,第一节 偏振光的属性 第二节 双色性和双折射 第三节 偏振与散射和反射 第四节 延迟器和起偏器 第五节 旋光性 第六节 光调制 第七节 偏振态的数学描述,第五章 光的偏振,第一节 偏振光的属性,Nature of polarized light Linear polarization Circular polarization Elliptical polarization Random polarizati

2、on Partial polarization,Linear Polarization,Linear-polarized or plane-polarized light: The orientation of the E-field is constant,If = 0 or , then E is linear polarized,第一节 偏振光的属性,Circular Polarization,If E0 x= E0y, = /2, then E is left-circularly polarized. If E0 x= E0y, = -/2, then E is right-circ

3、ularly polarized,第一节 偏振光的属性,Elliptical Polarization,第一节 偏振光的属性,State of Polarization,P-state: Plane- or linear-polarized R-state: Right-circular-polarized L-state: Left-circular-polarized E-state: Elliptical-polarized P = R L E = aR bL,第一节 偏振光的属性,How to prove it,Angular Momentum of Photons,第一节 偏振光的属

4、性,The Jones Vectors,Horizontal P-state,Vertical P-state,P-state at +45o,P-state at -45o,R-state,L-state,第一节 偏振光的属性,Polarizers Basic mechanism: Dichroism Birefringence Scattering Reflection Asymmetry,第二节 双色性和双折射,Maluss Law,第二节 双色性和双折射,Dichroism Wire-Grid Polarizer,The transmission axis of the grid is

5、 perpendicular to the wires,Dichroism refers to the selective absorption of one of the two orthogonal P-state components of an incident beam,第二节 双色性和双折射,Dichroism Dichroic Crystals,Orientation-dependent conductivity photon energy joule heat,第二节 双色性和双折射,The tansmitted light suffers polarization- (and

6、 wavelength-)dependent absorption dichroism,Dichroism Polaroid,Each separate miniscule dichroic entity is known as a dichromophore. The dichromophores are of molecular dimensions. Polaroid is a very effective polarizer across the entire visible spectrum, but is somewhat less so at the blue end,第二节 双色性和双折射,Optical Anisotropy Dichroism & Birefringence,第二节 双色性和双折射,birefringence,dichroism,Birefr