Photonic crystal passive devices for photonic
integrated circuits
Sangin Kim
School of Electrical and Computer Engineering, Ajou University
[email protected]
2006. 04. 03
Korea-US Nano Forum
1
Coupling characteristics of point/line defects
The parity of coupled localized modes in photonic crystals is not conserved.
0.45
even
odd
ωa/2πc
0.42
0.39
d
0.36
0.33
4
3
2
1
d (in unit of a)
C.-S. Kee, et al., Phys. Rev. B 67, 073103 (2003)
C.-S. Kee, et al., IEEE J. Quantum Electronics, (in press)
2
Photonic crystal passive devices
Design of photonic crystal-based passive devices
Transmission
1 .0
A
B
C
D
E
0 .8
0 .6
r= 0 .1 a
r= 0 .0 8 a
r= 0 .0 6 5 a
r= 0 .0 5 a
r= 0
0 .4
0 .2
0 .0
0 .3 2
0 .3 4
0 .3 6
0 .3 8
0 .4 0
N o rm a iz e d fre q u e n c y (C /a )
Highly efficient PC-based multi-channel drop filter
proposed and designed
S. Kim, et al., Optics Express, 12, 5518 (2004)
Ideal 3dB PC splitter/combiner
proposed and designed
S. Kim, et al., Optics Lett. 30, 257 (2005)
Photonic crystal waveguides and devices in microwave
C4
rout = 0.16a, rin = 0.08a
C3
rout = 0.1a, rin = 0.0456a
7.978
7.964
1.0
8.654
8.745
8.772
8.841
9.372
9.257
Arb. Unit
0.8
2D PCW consisting of
alumina rods and two
metal plates
0.6
0.026
0.018
0.034
0.031
0.038
0.035
GHz
9
0.029
0.035
0.4
0.2
0.0
8
r=0.08a
C2
r = 0a
r = 0.2a
C1
a
PC-based four-channel drop filter implemented
in microwave
Y. Roh, et al., Appl. Phys. Lett. (submitted)
3
Photonic crystal passive devices
Higher-order resonant filter
0.15a
0.2a
0.06a
0.066a
0.1518a
0.15a
For a = 500 nm, center frequency is 1550 nm
D. Park, et al., J. Lightwave Technol. 23, 1923 (2005)
Center frequency of 193.55THz,
flat bandwidth of 50GHz,
ripple less than 0.3dB
4
Compact sensor based on photonic crystals
1.0
∆n=0
-5
Transmission
0.8
∆n=2x10
-5
∆n=4x10
-5
0.6
∆n=6x10
-5
∆n=8x10
-4
∆n1.0x10
0.4
0.2
0.0
193.3
193.4
193.5
193.6
193.7
193.8
Frequency(THz)
E. Chow et al, Optics Letters, vol. 29, no. 10, 2004
-Strong dependence of the filter characteristics
is useful in sensor application.
5
Collaborators
▣ Prof. Ikmo Park and Prof. Hanjo Lim, Ajou Univ.
- Photonic crystal based device design
▣ Prof. Heonsu Jeon, Seoul National Univ.
- Realization of photonic crystal devices
6