Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
A Circular Nanoslit as a Spin-to-Orbital Angular Momentum Converter
Search
Philip Chimento
January 23, 2012
Science
1
150
A Circular Nanoslit as a Spin-to-Orbital Angular Momentum Converter
Scientific talk I gave at Physics@FOM Veldhoven 2012.
Philip Chimento
January 23, 2012
Tweet
Share
More Decks by Philip Chimento
See All by Philip Chimento
Taking Out The Garbage (And How You Can Help)
ptomato
1
180
Endless Hack
ptomato
0
16k
JavaScript in GNOME 2018
ptomato
0
16k
Modern Javascript in GNOME
ptomato
1
24k
New GJS Language Features in GNOME 3.24
ptomato
0
49k
Anomalous surface plasmon dispersion in aluminum
ptomato
1
97
Open and reproducible scientific programming
ptomato
1
250
Other Decks in Science
See All in Science
早わかり W3C Community Group
takanorip
0
250
Ph.D. defense "Convex Manifold Approximation for Tensors"
gkazunii
0
160
Transformer系機械学習モデルを取り巻くライブラリや用語を整理する
bobfromjapan
2
450
名古屋市立大学データサイエンス学部 夏のオープンキャンパス模擬授業20230818
ncu_ds
0
650
Pandas 2 vs Polars vs Dask (PyDataGlobal 2023 December)
ianozsvald
0
360
Machine Learning for Materials (Lecture 6)
aronwalsh
0
410
ベクトル型スーパーコンピュータ「AOBA-S」の性能評価
keichi
0
230
iRIC MI
nkmr_rl
0
2.7k
マルチモーダルモデルと自動運転 車載モデルのコスト・スループット・レイテンシ / LLM in Production Meetup #2 20231023
yuyamaguchi
1
1k
Pokemon Roughs
shoryuuken
0
350
大規模画像テキストデータのフィルタリング手法の紹介
lyakaap
5
1k
脳とAIは似ているか ― NeuroAI の挑戦
ykamit
9
6.6k
Featured
See All Featured
Documentation Writing (for coders)
carmenintech
59
3.8k
The Brand Is Dead. Long Live the Brand.
mthomps
48
21k
Design and Strategy: How to Deal with People Who Don’t "Get" Design
morganepeng
113
18k
Ruby is Unlike a Banana
tanoku
95
10k
How to train your dragon (web standard)
notwaldorf
71
5.1k
How to Create Impact in a Changing Tech Landscape [PerfNow 2023]
tammyeverts
12
1.4k
Put a Button on it: Removing Barriers to Going Fast.
kastner
58
3k
Agile that works and the tools we love
rasmusluckow
323
20k
Teambox: Starting and Learning
jrom
126
8.4k
Fontdeck: Realign not Redesign
paulrobertlloyd
75
4.8k
Building an army of robots
kneath
300
41k
Making Projects Easy
brettharned
106
5.4k
Transcript
A Circular Nanoslit as a Spin-to-Orbital Angular Momentum Converter Philip
Chimento Gert ‘t Hooft Eric Eliel
Suspicious behavior in subwavelength slits
Chimento, Kuzmin, Bosman, et al. (2011). Opt. Expr. 19 (24),
24219. Slit in a metal film
Chimento, Kuzmin, Bosman, et al. (2011). Opt. Expr. 19 (24),
24219. Slit in a metal film Subwavelength in one direction “Infinite” in the other
Chimento, Kuzmin, Bosman, et al. (2011). Opt. Expr. 19 (24),
24219. Almost ideal metal TM TE Slit width in λ
Chimento, Kuzmin, Bosman, et al. (2011). Opt. Expr. 19 (24),
24219. Real metal TM TE Slit width in λ
Chimento, Kuzmin, Bosman, et al. (2011). Opt. Expr. 19 (24),
24219. Real metal If designed carefully, there is a point where the slit is a quarter-wave plate Analyzer rotation Input state Measured output
Photo credit: Dandelion And Burdock, Flickr We roll the slit
up into a circle
Space-variant λ/4 plate
Space-variant λ/4 plate TM TM TE TE
Space-variant λ/4 plate Input: circular polarization σ+ state
Space-variant λ/4 plate Output: ?
Transmitted polarization state Schematic
Transmitted intensity Experiment
Transmitted polarization state Left-handed elliptical Right-handed elliptical Ellipticity <10% Experiment
Photo credit: Cayusa, Flickr Where did the spin angular momentum
disappear to?
Cylindrical symmetry means no angular momentum is transferred to the
plate Photo credit: pixaio, sxc.hu
Fascinating! What does the far field look like?
Far field Angle Angle Intensity (arb. units)
Far field Angle Angle Intensity (arb. units) No hole in
the middle!
Far field Component with the same handedness as the input
(σ+) Component with opposite handedness to the input (σ−)
Phase of central spot Component with the same handedness as
the input (σ+) Component with opposite handedness to the input (σ−)
A proper calculation mode con- verter ѫ +, =
ѫ+ , = ѫ −, =
A proper calculation mode con- verter +TQJO = − I
+PSCJU = I +TQJO = + I +PSCJU = ѫ +, = ѫ+ , = ѫ −, =
A proper calculation mode con- verter +TQJO = − I
+PSCJU = I +TQJO = + I +PSCJU = Total angular momentum remains the same! ѫ +, = ѫ+ , = ѫ −, =
We found, constructed, and understood a novel spin-to-orbit angular momentum
coupling device.
None
None
Orbital angular momentum ⟨Jspin ⟩ = 0 ⟨Jorbit ⟩ =
̵ h