3D Optical Interconnects using Photonic Crystals

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3D Optical Interconnects using Photonic Crystals

• G.S. Petrich, E.P. Ippen, J.D. Joannopoulos, L.A.
  Kolodziejski
• Research Laboratory of Electronics
• Massachusetts Institute of Technology

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3D Optical Interconnect
Objectives I. input coupler II. optical
wires III. interface coupling
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I. INPUT COUPLER



resonance at 831 nm pump
PC region
Composite image of 50 µm square mesa

• design/fabricate/test input coupler at 1550 nm
  in SOI

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II. OPTICAL WIRES THEORY
PC Dispersion Surfaces

• Flat photonic crystal
• dispersion surfaces
• ? collimation for a
• wide range of
• input angles
• Input light tightly focused
• Light couples directly
• from isotropic media

k1
k2
Isotropic Dispersion Surface
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II. OPTICAL WIRES SIMULATIONS
Photonic crystal
Divergent behavior ? ?0.18
Simulations by Dr. Marin Soljacic and Mihai
Ibanescu
Super-Collimation behavior ? ?0.19
II. OPTICAL WIRES DEVICE DESIGN
high index thickness 200 nm low index
thickness 3 mm
-to demonstrate / investigate optical wires at
1550nm in SOI
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III. OPTICAL INTERFACE COUPLING
Analogous to conventional waveguide to photonic
crystal waveguide coupling
SEM
L
db300 nm
500nm
dd250 nm
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III. OPTICAL INTERFACE COUPLING
-design / implement interfacial region to enable
broadband coupling
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PLAN OF ATTACK

• Objectives
• Input Coupler
• design/fab/test input coupler at
  1550nm in SOI
• Optical Wire
• demonstrate/investigate optical wires
  at 1550nm
• III. Interfacial Coupling
• design/fab/test method to couple
  light at interface