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 Angula...
Search
Philip Chimento
January 23, 2012
Science
1
180
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
260
Endless Hack
ptomato
0
16k
JavaScript in GNOME 2018
ptomato
0
17k
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
100
Open and reproducible scientific programming
ptomato
1
330
Other Decks in Science
See All in Science
02_西村訓弘_プログラムディレクター_人口減少を機にひらく未来社会.pdf
sip3ristex
0
640
機械学習 - ニューラルネットワーク入門
trycycle
PRO
0
860
データベース03: 関係データモデル
trycycle
PRO
1
270
mathematics of indirect reciprocity
yohm
1
190
06_浅井雄一郎_株式会社浅井農園代表取締役社長_紹介資料.pdf
sip3ristex
0
650
データマイニング - ノードの中心性
trycycle
PRO
0
280
データベース06: SQL (3/3) 副問い合わせ
trycycle
PRO
1
640
AIに仕事を奪われる 最初の医師たちへ
ikora128
0
980
CV_3_Keypoints
hachama
0
210
データマイニング - ウェブとグラフ
trycycle
PRO
0
180
03_草原和博_広島大学大学院人間社会科学研究科教授_デジタル_シティズンシップシティで_新たな_学び__をつくる.pdf
sip3ristex
0
630
データマイニング - グラフ構造の諸指標
trycycle
PRO
0
190
Featured
See All Featured
Design and Strategy: How to Deal with People Who Don’t "Get" Design
morganepeng
132
19k
Let's Do A Bunch of Simple Stuff to Make Websites Faster
chriscoyier
507
140k
The Success of Rails: Ensuring Growth for the Next 100 Years
eileencodes
46
7.6k
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
PRO
189
55k
JavaScript: Past, Present, and Future - NDC Porto 2020
reverentgeek
52
5.6k
I Don’t Have Time: Getting Over the Fear to Launch Your Podcast
jcasabona
33
2.5k
Reflections from 52 weeks, 52 projects
jeffersonlam
352
21k
Building a Scalable Design System with Sketch
lauravandoore
462
33k
Docker and Python
trallard
46
3.6k
Designing for Performance
lara
610
69k
Refactoring Trust on Your Teams (GOTO; Chicago 2020)
rmw
35
3.2k
Testing 201, or: Great Expectations
jmmastey
45
7.7k
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