What are Metamaterials?

Silicon Square Wafers Used For Metamaterials Measurements

A PhD candidate working at a Metamaterial Research Centre requested a quote for the following.

 I am working in the field of metamaterials. We are looking to purchase Silicon wafers from you and would like to request a quote for 100 Silicon wafers having the specifications mentioned below.

I am doing a quick check for some metamaterials measurements. My request may sound strange, but I really appreciate your help. Could you please let me know if you can send me such small piece of silicon with the above thickness?

We suggest:

Item   Qty.   Description
AW47. 12   Silicon squares, per SEMI, P/E 10.0±0.5mm x 10.0±0.5mm × 5,000±100µm,  p-type Si:B[100]±0.5°, Ro=(1-20)Ohmcm, One-side-polished, back-side Alkaline etched.

Reference #121042 for specs and pricing.

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Silicon-on-Insulator Wafers for Metamaterials Research

A PhD working in a metamaterials devices and
applications group, requested a quote for the following.

I'm looking for SOI wafers with a device layer thickness of 320 nm and oxide layer thickness of 1 micron.  Would it be possible to special order that device layer thickness? We use them for photonics metamaterials research.

Reference #141129 for specs and pricing.

Silicon-on-Sapphire Wafers for  Metamaterials and
Terahertz Research

I would like to have an offer or 3 SOS Wafers 4" (or 6 2" Wafers) with a specific resistivity < 2e-2 Ohmcm (or the lowest specific resistivity you can offer).

Reference #218458 for specs and pricing.

Gold (Au) Metamaterials and Terahertz Spectrometer

 

I am interested in placing an order for a number of fused silica wafers. We are intending to undertake some fabrication as part of a research project and would like to purchase a number of 4 inch wafers with the following specs. Can you please detail availability and price. Number 8 Size 4 Inch Fused Silica Grade 1JGS1 Polished on both sides Thickness 700 We will be using gold metamaterials and a terahertz spectrometer. 

Reference #261819 for specs and pricing.

Nitride on Fused Silica Wafers for Meta Material Applications

A research fellow requested help with the following question..

Question:

I’m ideally looking for Silicon Nitride on fused silica for metamaterials applications, do you know if this is readily available or a bespoke process?

Just curious about the items found on your store.   Are these “silicon nitride” (SiNx) deposited onto Silicon wafers? Wondering also what the silicon substrate information is too. I’m ideally looking for Silicon Nitride on fused silica for metamaterials applications, do you know if this is readily available or a bespoke process?

I placed a quote for some fused silica wafers earlier, so similar specs to those. Double side polished, 100mm diameter and 500μm thickness or less would be ideal, with the silicon nitride around 650 - 700nm thickness, although this can be less down to around 600nm I think would be fine. Depending on cost I would hope to be able to afford 25 of these, but maybe 10 is a more accurate number – they would primarily be a “backup” option as I have capability for silicon nitride deposition at my University.

We use the fused silica wafers to produce metasurfaces/metamaterials on, with the fused silica wafers as the substrate material on which I will pattern the silicon nitride layer into nanostructures – see below for previous versions I’ve made. This was for a metasurface lens working at 1064nm wavelength (using amorphous silicon layer on fused silica). 

Ideally I require as low roughness fused silica as possible for optical grade transmission experiments, but maybe the fabrication process causes some roughness anyway so “medium” quality may also work, I’ve never compared!

Reference #258731 for specs and pricing.

What are Metamaterials?

Metamaterials are engineered materials designed to have properties not typically found in nature. These materials derive their unique characteristics from their structure rather than their composition. By manipulating the arrangement and geometry of their constituent elements, metamaterials can exhibit unusual properties such as negative refraction, invisibility, or extraordinary absorption.

Key Features of Metamaterials:

1. Artificially Engineered Structure: Metamaterials are created by arranging microscopic or nanoscopic elements in specific patterns. This design allows them to interact with electromagnetic waves in novel ways.

2. Unusual Properties:

   • Negative Refractive Index: Metamaterials can bend light in the opposite direction to that observed in natural materials, potentially leading to applications like perfect lenses.
   • Invisibility Cloaks: By bending light around an object, metamaterials can make it appear invisible or less visible to certain wavelengths.
   • Enhanced Absorption: They can be engineered to absorb specific frequencies of light or sound more efficiently than conventional materials.

3. Applications:

   • Imaging and Lens Design: Metamaterials enable the creation of superlenses that can see details smaller than the wavelength of light.
   • Communications: They are used in advanced antennas and waveguides to improve signal transmission and reception.
   • Sound and Vibration Control: Metamaterials can manage sound waves and vibrations in innovative ways, leading to noise-canceling devices and better acoustic design.
   • Thermal Management: They can be used to control heat flow in ways that traditional materials cannot.

4. Types:

   • Electromagnetic Metamaterials: Designed to manipulate electromagnetic waves, including visible light, microwaves, and radio waves.
   • Acoustic Metamaterials: Engineered to control sound waves and vibrations.
   • Elastic Metamaterials: Focused on controlling mechanical waves and vibrations.

Metamaterials represent a frontier in material science, enabling advancements in technology that were previously thought impossible. Their unique properties are a result of precise and deliberate structural design, opening up new possibilities across various fields.