宽波段金属光栅设计中闪耀波长对光栅异常的补偿效应

给出适用性强、工艺上易于实现的单闪耀面宽波段金属光栅设计新方法。基于Rayleigh异常和共振异常两种不同的光栅异常机理，分别讨论了它们出现的条件，在光栅电磁场理论的基础上，数值分析了TE波、TM波闪耀波长的分布规律，发现了闪耀波长与光栅异常、光栅光谱范围的关系，提出了用TM波第一闪耀波长补偿Rayleigh异常或共振异常实现制作宽波段金属光栅的设计思想。同时，指出了TM波第一闪耀波长对Rayleigh异常的补偿效应，只是它对共振异常的补偿效应的极限情况。给出了将补偿效应应用于紫外可见分光光度计、近红外分光光度计和红外分光光度计用不同刻线密度宽波段金属光栅的设计实例。补偿效应法无论在理论设计上还是在工艺实现上都要优于传统的宽波段金属光栅设计方法，它可以使得用于各个波段上的宽波段金属光栅衍射效率都在40%以上。

The compensating effect of blazed wavelength to grating anomalies in the design of broadband metallic diffraction gratings

A new design method with good applicability and easy to implement in technology is presented for broadband metallic diffraction gratings with single blaze surfaces.In consideration of the principles of two types of grating anomalies,Rayleigh type and resonance type,the occurrence conditions of the grating anomalies are discussed.On the basis of electromagnetic theory of gratings,the blaze characters of diffraction efficiency both for TE and TM modes are numerically analyzed,and the relationships among the g...