3D Optical Systems group: research summary switchable resonance - - PowerPoint PPT Presentation

George Barbastathis Mechanical Engineering Department

3D Optical Systems group: research summary

switchable resonance tunable resonance profilometry tomography

Integrated optics (≈2D) 3D optics 3D nanomanufacturing

3D via 2D + folding: nanostructured origami

George Barbastathis Mechanical Engineering Department

3D optics for imaging

1m 1m 1cm 1cm 100 100μ μm m 1 1μ μm m 10nm 10nm 100m 100m

Plankton (individual)

Object size Object size Working distance Working distance

Imaging properties: Imaging properties:

1mm 1mm 10cm 10cm 1m 1m 1km 1km

Microscopy

• no or minimal scanning
• white light (passive) illumination
• hyperspectral imaging

… …

GOAL GOAL

1cm 1cm

George Barbastathis Mechanical Engineering Department

Integrated optics with micromechanical switching/tuning

diffraction gratings with continuously tunable period ~2002-2003 cavity with photonic crystal reflectors ring resonator with high-index contrast waveguides electrostatic comb drive / parallel plate actuation piezoelectric thin film actuation switchable resonance tunable resonance ~2003-2004

Collaborators: Sang-Gook Kim (1, 2, 4), Hermann Haus and Harry Tuller (3)

(1) (1) (2) (2) diffraction grating separates colors into a rainbow (4) (4) (3) (3) Fabry-Perot cavity transmits one color (resonant), reflects the rest emphasis on integrated optics

George Barbastathis Mechanical Engineering Department

• 1. Folding

Folding Folded Pattern optical elements Membranes are folded on the wafer Aligned Novel hinge pins ensure < 2 um alignment

3 8 µm

Controlling curvature through stress and etch timing 10 min 20 min

Nanostructured OrigamiTM

3D fabrication and assembly method

Design and simulation software tool using screw calculus for kinematics; future: wrench calculus for dynamics, charge models for unfolding Fabrication processes: SU-8, silicon Patterning: Optical, e-beam litho

39.0nm 109.9nm

Collaborators: Hank Smith, Erik Demaine, MIT