Send the link below via email or IMCopy
Present to your audienceStart remote presentation
- Invited audience members will follow you as you navigate and present
- People invited to a presentation do not need a Prezi account
- This link expires 10 minutes after you close the presentation
- A maximum of 30 users can follow your presentation
- Learn more about this feature in our knowledge base article
Do you really want to delete this prezi?
Neither you, nor the coeditors you shared it with will be able to recover it again.
Make your likes visible on Facebook?
Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.
Nanophotonics and Metamaterials
Transcript of Nanophotonics and Metamaterials
Nanophotonics and Metamaterials
Metamaterials are unique materials made by humans that can be engineered to exhibit properties not readily found in nature.
wavelength << Structure size
wavelength~ Structure size
wavelength >> Structure size
permitivity: Lorentz Model
Laura Maria Pulido Mancera
Universidad Nacional de Colombia
Curso. Principios Básicos de Nanotecnología. Universidad de los Andes
permeability: Very small variations at optical frequencies.
behavior of light on the nanometer scale
light confining structures
that can slow down, trap, enhance
Q. Bao, L Loh. Graphene Photonics,Plasmonics and Broadband Optoelectronic Devices. Acs Nano vol 6, No 5 3677-3694. 2012
Surface Plasmon diode,
Organic Plasmon emitting diode
ISSUES TO ADDRESS...
• What happens when light shines on a material?
• Why do materials have characteristic colors?Absorption
• Why are some materials transparent and others not?
Reflection and Transmission coefficients
THE REFRACTIVE INDEX IS GIVEN BY THE PERMITIVITY!
Photonic crystals can be fabricated for one, two, or three dimensions. One-dimensional photonic crystals can be made of layers deposited or stuck together; two-dimensional ones can be made by drilling holes in a suitable substrate, and three-dimensional ones by, for example, stacking spheres in a matrix and dissolving the spheres.
The major challenge in fabrication of these structures, is sufficient precision to prevent scattering losses blurring the crystal properties and with processes that can be robustly mass produced.
periodic photonic crystals is a photonic-crystal fiber, such as a "holey fiber" and photonic crystal slab. These structures consist of a slab of material (such as silicon) which can be patterned using techniques borrowed from the semiconductor industry.
photolithography and etching techniques similar to those used for integrated circuits.
Cloaking ans Superlenses!
Photonic Crystal Lasers (Nanocavities)
Info: Course of Nanophotonics
Purdue University (Shalaev)
Duke University (R. Smith)
Imperial College London (J. Pendry)
Berkeley University (Yablonovitch)
Universidad de Sevilla (R. Marqués)
Universidad Nacional de Colombia (J. Baena)
2D : Electron Beam Lithography
Focused ion-beam milling
2D: PCB technology:
3D: Making multiple layers
EBL: High Fabrication costs and small areas (100 microns2)
FIB: Matching with other structures
OL and NIL: low cost, large area (~cm2)