Bethanie J. H. StadlerAIMD Group

Outline

• Motivation (isolators)

• Garnet Layer– Fabrication– Characterization

• Buffer Layers

• Permanent Magnets

• Photonic Crystals

Bethanie J. H. StadlerAIMD Group

SmCo : RF Sputtering

Demagnetized SmCo bar magnet on 8” Cu disk target Use confining ring Fused quartz substrates

Ar

SiO2 substrate

SmCo Target

Confining ring

RF Sputter System

Bethanie J. H. StadlerAIMD Group

0

50

100

150

200

250

300

350

30 32 34 36 38 40 42 44 46 48 50

2-Theta

Inte

ns

ity

[C

ou

nts

]

1 0

1

2 0

0

1 1

0

2 0

1

Sm

Co

5

Sm2Co17

XRD of Permanent Magnet Film

Majority phase is Sm2Co17

Bethanie J. H. StadlerAIMD Group

-1200

-900

-600

-300

0

300

600

900

1200

-1000 -750 -500 -250 0 250 500 750 1000

Applied Field [Oe]

Mag

net

izat

ion

[em

u/c

m3]

VSM of Permanent Magnet Film

Ms: 1177emu/cm3

Mr: 1024emu/cm3

Hc: 465Oe

Sm2Co17

SmCo5

Bethanie J. H. StadlerAIMD Group

Outline

• Motivation (isolators)

• Garnet Layer– Fabrication– Characterization

• Buffer Layers

• Permanent Magnets

• Photonic Crystals

Bethanie J. H. StadlerAIMD Group

Magneto Photonic Crystal

Hexagonal Photonic Crystal Array TE Band Gap

Point Defect Line Defect

Bethanie J. H. StadlerAIMD Group

Photonic Crystal Design

1.31m

Band Gap

Rod: YIG

Background: Air

Hole: Air

Background: YIG

TE/TM Band Structure

Fre

quency

(/

2c

) [

m-1

]

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

M K

TE/TM Band Structure

Fre

quency

(/

2c

) [

m-1

]

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

M K

Bethanie J. H. StadlerAIMD Group

Beam Propagation (FDTD) Simulation of Photonic Crystals

Rod: YIG

Background: Air

Hole: Air

Background: YIG

Bethanie J. H. StadlerAIMD Group

Nanopore Fabrication

Al PtElectrolyte

Stirrer

Temperature Bath

Aluminum

Anodized Aluminum

Oxide

Self Assembled

Nanopores

Self Assembled Nanopores in Aluminum Oxide

Bethanie J. H. StadlerAIMD Group

Nanopore dimension control

a=30nm, r=10nm a=100nm, r= 30nm

Bethanie J. H. StadlerAIMD Group

Bandgap Simulation

TE Band Structure

Fre

quen

cy (/

2c)

[m

-1]

0

1

2

3

4

5

6

7

8

9

M K

Bandgap for current pore dimensions corresponds to UV.

Bethanie J. H. StadlerAIMD Group

Photonic Crystal on YIG

Nanopore

Mask

YIGAir Holes,

YIG Background

YIG Rods,

Air Background

Bethanie J. H. StadlerAIMD Group

Conclusions

• Magneto-optics are important to integrated photonics.

YIG: secondary phases & temperature limiting. MgO buffer layers and SiO2 claddings successful.

SmCo permanent magnets are well developed.

Photonic Crystals structures simulated and

fabrication is begun.