Table 3.

Nano wire grid polarizers.

Year, Ref.	Metal of Wire Grid	Grid Period (Pitch) (nm)	Extinction Ratio (ER)	SNR (dB)	Transmission Efficiencies (%)
1998 [91]	Al	310–450	30
2004 [90]	Al	200			38
2007 [82]	Al	200	>370		>61.5
2007 [92]	Al	118			85–90
2008 [86]	Al	80		47–70	38–94
2008 [93]		446			40
2010 [85]	Al	140
2010 [94]		335
2011 [95]	Al	200		>30	>75
2011 [96]	Al	350
2011 [88]	Al	240	>171.8		91.6
2011 [89]	Al	150
2012 [97]		300