| 摘要 |
A spatial light modulator having a plurality of cells and modulating the intensity of incident light as the light is transmitted through each cell of the modulator, the spatial light modulator comprising:
a metal film (10,102) having a periodic array of subwavelength-diameter holes (12) provided therein; and
a supporting layer (14,118), at least a portion of the supporting layer having a refractive index which is selectively variable for each cell, the selectively variable refractive index portion being substantially adjacent to the metal film such that the metal film (10,102) and the supporting layer (14,118) comprise a perforated metal film unit (20), and wherein selective variation of the refractive index of the selectively variable refractive index portion of the supporting layer modulates the intensity of light transmitted through the perforated metal film unit (20) for each cell without substantially changing the direction of the light. |
