richard ucsbnano 2008 03mar 29d

8/9/2019 Richard UCSBNano 2008 03mar 29d

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Nanotechnology and optical computernetworks using waveguides and lasers

Richard Moore, RET Fellow

Demis John, MSEE/Doctoral candidate MentorDr. Blumenthal, Principal Investigator

Summer 2007 RET Program UCSB


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Moores 1st Law

Moores law says that the amount of space

needed to install a transistor on a chip will

shrink by half every 18 months. This is the good news

N.b., Gordon Moore, founder of Intel Corporation


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My task in the RET Program

Try to create a macro-level analogy for

the nano-level technology I saw at UCSB

Design three labs based on1. Light going through media of different optical

density to cause the formation of nano-sized

lasers

2. Show that light has different wavelengths

3. Create a waveguide that light can travel

through and stay within


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1st Lab

Observation: Light going through media of

different optical density to cause the

formation of nano-sized lasers Lab: Slinky vs. Snaky Lab

Purpose: To show how waves behave

when different media are encountered

Analogy: Building light up inside a laser by

getting it to bounce back and forth


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Slinky and Snaky

Ready


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Slinky and Snaky

Set


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Slinky and Snaky

Go


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Single Slinky

Generation of a transverse wave


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Single Snaky

Reflection of a transverse wave


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2nd Lab

Observation: Show that light has different

wavelengths

Lab: Wavelength lab, or color lab Purpose: To show, via Youngs

interference demonstration, that light of

different colors has different wavelengths

Analogy: Using infrared light in Indium

Phosphide waveguides


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Get liquid graphite to coat slides

(They only ship this paint to schools)


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Get Slides and Blades

Teacher slices coated slides


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Coated slide is sliced

Two blades, side by-side, cut twin lines

Three blades, with center one raised, cut

wider line


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Colored film material

Using two colors of film side by side can

rapidly show that the wavelengths of two

different colors of light are different sizes


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Youngs demonstration is ready

Each color of film transmits a different

wavelength of the visible light


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3rd Lab

Observation: A waveguide that light can travelthrough and stay within for use on the internet

Lab: Waveguide lab, or Jell-O lab

Purpose: To create a macro model of light thatcan stay within a flexible and inexpensivewaveguide, or optical cable, by staying moreoblique than the critical angle in the optically

denser material Analogy: Infrared light in the Indium Phosphide

waveguide


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Preparing cake pan for Jell-O

Line pan with saran wrap so Jell-O wont

stick


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Preparing the Jell-O

Boiling the water


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Preparing the Jell-O

Cooking in class


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Preparing Photo cell on 3 x 5 card

Mount through holes near edge of card


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Photo cell and VOM

With just ambient light


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Photo cell and VOM

With ambient light blocked


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Photo cell and VOM

With red laser light


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Jell-O as waveguide

Slicing to form sections with smooth sides


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Jell-O as waveguide

Slicing to form sections with smooth sides


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Jell-O as waveguide

Refraction in Jell-O


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Jell-O as waveguide

Refraction & Reflection at slice


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Jell-O as waveguide

Transmitting through a straight section


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Jell-O as waveguide

Bending through a curve off a smooth side


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Jell-O as waveguide

Loosing the internal beam on a roughened

surface


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Goal of refraction activity

Solve for the Jell-Os index of refraction


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Refraction Activity

Taking measurements


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Measuring optical density

One section of Jell-O


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Measuring optical density

Two sections of Jell-O


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Indium Phosphide

A real waveguide made in the clean room


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richard ucsbnano 2008 03mar 29d

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