Corporate version - CSEM, the Swiss platform for transfer in

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Mikro- und Nanotechnologien für die Photonik
Christian Bosshard
CSEM SA
Innovationen mit Licht
PSI, Dienstag, 24. November 2015
CSEM SA
CSEM at a glance
Our mission
Development and transfer of microtechnologies to the
industrial sector – in Switzerland, as a priority – in
order to reinforce its competitive advantage
• Cooperation agreements with
established companies
• Creation of start-ups
Copyright 2015 CSEM | Innovationen mit Licht, PSI, 24. November 2015 | Christian Bosshard | Page 2
Micro-/nano-optics
Diffractive optics vs. Refractive optics
• Pros



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Chroma separation
Polarization optics
Ultra-flat structure
Embedded structure
Angular variability
• Cons
 White direct imaging/lighting
 Wavelength-specific designs
Select the
best, or
combine
both
• Pros

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White direct imaging/lighting
Wavelength-independent
Easy design tools
Relative angular stability
• Cons
 No polarization optics
 Structure not easily embedded
Lighting & illumination
CSEM FlexoLed
Thin flexible foil
Close-up
Large Area Solid State Intelligent Efficient luminaires
Thin LED modules need light management to achieve spatially uniform lighting
• Today
o Injection of white light into and extraction
from thick, heavy and rigid acrylic plates
o Relatively modest light quality
• Future
o Above a certain efficacy, light quality, form
factor and cost are key aspects
Color sensor
Lumogen® Fluorescent Dyes
Light management
Heat management
Property of the LASSIE-FP7 Consortium
• Light management solution for spatial uniformity
o Light in/out coupling of blue light into a thin (0.5mm) light guide
o Diffractive / refractive hybrid system
Extra-flat and semi-transparent illumination system
General principle
Imaging: millimetric plastic cog wheel
light out-coupled from a glass plate: frontside (left) and back-side (right) illumination
intensities differ by about one order of
magnitude
Ultraflat imaging
Imaging with a diffractive periscope
Ultraflat imaging
Diffractive optics for imaging
Patent filed
Nanostructured grating
Image beam
Diffracted beam
Light guide
Imaging beam
Nanostructured grating
Diffractive nanostructures
used as broadband
high efficiency couplers
Image taken through a diffractive periscope
Ultraflat imaging
Ultraflat imaging
polymer slab with thickness 200µm
~100um easily resolved
Light in/outcoupling
Micro-lenses
• Tune the acceptance angles of vision sensors
• Optical security (US dollars banknotes)
• Beam shaping for displays
Micro-lenses
Spherical micro-lenses …
Squared micro-lenses
on a CMOS chip
… highly packed
Fresnel micro-lenses
on a laser chip
Free-form microlenses
Advanced micro-lenses
Very Small Microlenses
Custom or small production
Wafer-scale Photolithography and Reflow  Low roughness
Direct Ink-jet printing of microlenses
Lenses on a waveguiding micro-pillar
Microlenses combined with diffuser
Projection of artwork
Diffractive optical elements (DOEs)
• Shaping laser beams (e.g. gaussian to flat top or rectangular)
• Generation of arbitrary light patterns (cross hairs, circles, rectangles etc.)
• DOEs are designed for a defined wavelength,
-> projections are usually monochromatic
RGB projection of images in full color
RGB projection of images in full color
VELEC (french artist, supply of artwork, www.velec.ch)
Security and brand protection: optical effects
Counterfeiting is everywhere ….
Sometimes easy to recognize …
Sometimes a bit more difficult ….
Banknotes and passports
90°
Courtesy Hologram. Industries
Plasmonic nanostructures
• Plasmonics = oscillations of e- in metal
• Resonance depends on geometry of metal
structure
0-order reflection
incident
e-
Period smaller λ
Local field enhancement
0-order transmission
Also possible based on plasmonic nanostructures
• The effect: switch from white to color upon tilt.
Dümpelmann et al., manuscript submitted
Patent filed
Prototype of asymmetric plasmonic device
Dümpelmann et al., manuscript accepted
Patent filed
Also interesting for sensors !
Holograms
Security and brand protection: tooling
Holograms in Steel
Hard Steel plate
Company and product logos
Combined features: injection moulded plastics
Profile in Steel
3D Hologram Effects in Steel
Hologram supplied
by 3D AG
Injection Molding Lifetime Test
250
Depth [nm]
200
feature size
700nm
150
100
feature size
400nm
50
0
20’000
50’000
270’000
500’000
580’000
690’000
740’000
Number of Shots
Energy
Light- and heat management - Concept of Messe Basel
Energy
Seasonal heat management films
Film
Reflected
summer
light
Transmitted
winter light
Patent filed
Sensors
Gas/humidity grating sensors
• Color of a chemically sensitive dye
enhanced by a resonant grating
NH3
• Concept:
Dye
 Combine a resonant structure with
a thin film dye
 Enhance the optical changes of a
thin dye film (absorption)
Gas exposure
Exposed
Color change after
gas exposure
Protected
Sensitive
layer
Sensors
NH3 gas sensing gratings
NH3
Dye
NH3
Chemically sensitive dye
Dye
Exposed
Exposed
Protected
Without grating: low contrast
Protected
With grating: high contrast
Sensors
Plasmonic sensor
Water
Drop of colorless liquid
Technologies
Fabrication example
Photonics as key enabler
In Switzerland
Swissphotonics NTN
Direct support of companies with focus on SME’s
Partner matching to
initiate technology
developments
Networking within
Switzerland
(e.g. workshops)
Individual consulting/
support
Swissphotonics
NTN
International contacts:
Photonics21, EPIC,
OSA, IOA,…
Work with Swissmem
Support for funding
access: CTI, EU/
Horizon2020, ESA
Swissphotonics NTN
More than 120 members
… and many more
www.swissphotonics.net
Photonics beyond Switzerland
Photonics in Europe
The European Technology Platform
The European Industry Association
The HTA Photonics Platform
Thank you for your attention!

Corporate version - CSEM, the Swiss platform for transfer in

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