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Translation of interference pattern by phase shift for diamond photonic crystals

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Abstract

We demonstrate the construction of diamond photonic crystal structures by the translation of a multi-beam interference pattern. Using phase shift of each beam, the double-exposed interference patterns can be aligned in the [111] direction for a face-centered cubic (FCC) and [210] direction for a body-centered cubic (BCC), respectively, producing diamond D from FCC and BCC-diamond like structure from BCC. The present result shows that the complete bandgap has been retained with slight deviation from ideal diamond symmetry.

©2005 Optical Society of America

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Figures (5)

Fig. 1.
Fig. 1. Translation of (a) FCC interference pattern in the [111]direction and (b) BCC interference in the [210] direction.
Fig. 2.
Fig. 2. The relative position of the FCC interference pattern (red) and the shifted pattern (blue) in the [111] direction by (a) 0.20d(1,1,1), (b) 0.25d(1,1,1), and (c) 0.29d(1,1,1). The level surface of each double-exposed FCC interference pattern with a filling fraction of 0.22 is shown in (d -f) for their respective cases.
Fig. 3.
Fig. 3. Intensity profile of 8-term and 4-term interference patterns along [111] direction
Fig. 4.
Fig. 4. The relative position of the BCC interference pattern (red) and the shifted pattern (blue) in the [210] direction by (a) 0.20d (1,1,1), (b) 0.25d (1,1,1), and (c) 0.29d (1,1,1). The level surface of each double-exposed BCC interference pattern with a filling fraction of 0.20 is shown in (d-f) for their respective cases.
Fig. 5.
Fig. 5. Complete PBG of double-exposed (a) FCC and (b) BCC interference patterns as a function of the normalized pattern shift in [111] and [210], respectively.

Equations (17)

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I = n = 1 4 E n 2 + m < n 4 E n E m ε n · ε m * cos [ ( k n k m ) · r + ( ϕ n 0 ϕ m 0 ) ] .
I nm = E n E m ε n · ε m * cos [ ( k n k m ) · r + ( ϕ n 0 ϕ m 0 ) + ( ϕ n ϕ m ) ] .
I nm = E n E m ε n · ε m * cos [ ( k n k m ) · ( r + r ) + ( ϕ n 0 ϕ m 0 ) ] .
( ϕ n ϕ m ) = ( k n k m ) · r .
I nm ~ cos [ 2 π d ( x y + z ) + ( ϕ 1 ϕ 3 ) ] + cos [ 2 π d ( x + y + z ) + ( ϕ 1 ϕ 4 ) ]
+ cos [ 2 π d ( x y + z ) + ( ϕ 2 ϕ 3 ) ] + cos [ 2 π d ( x + y + z ) + ( ϕ 2 ϕ 4 ) ]
I nm ~ cos [ 4 π d ( y + z ) + ( ϕ 1 ϕ 2 ) ] + cos [ 4 π d ( x + y ) + ( ϕ 1 ϕ 3 ) ]
+ cos [ 4 π d ( x + z ) + ( ϕ 1 ϕ 4 ) ] + cos [ 4 π d ( x z ) + ( ϕ 2 ϕ 3 ) ]
+ cos [ 4 π d ( x y ) + ( ϕ 2 ϕ 4 ) ] + cos [ 4 π d ( y + z ) + ( ϕ 3 ϕ 4 ) ]
I nm ~ cos [ 2 π d ( x y + z ) ] + cos [ 2 π d ( x + y + z ) ]
+ cos [ 2 π d ( x y + z ) ] + cos [ 2 π d ( x + y + z ) ]
+ sin [ 2 π d ( x y + z ) ] sin [ 2 π d ( x + y + z ) ]
sin [ 2 π d ( x y + z ) ] + sin [ 2 π d ( x + y + z ) ]
I nm ~ cos [ 4 π d ( x + y ) ] + cos [ 4 π d ( y + z ) ]
+ cos [ 4 π d ( y + z ) ] + cos [ 4 π d ( x y ) ]
+ sin [ 4 π d ( x + y ) ] sin [ 4 π d ( y + z ) ]
sin [ 4 π d ( y + z ) ] sin [ 4 π d ( x y ) ]
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