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Something About Something About Optical Blackhole Optical Blackhole Li Li ( Li Li ( 李李 李李 ) ) Dept. Phys., Fudan Univ. Dept. Phys., Fudan Univ. [email protected] [email protected] 091229 ED 10min presentation 091229 ED 10min presentation

Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. [email protected] 091229 ED 10min presentation

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Page 1: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

Something About Something About Optical Blackhole Optical Blackhole

Li Li (Li Li ( 李力李力 ))Dept. Phys., Fudan Univ.Dept. Phys., Fudan [email protected]@gmail.com

091229 ED 10min presentation091229 ED 10min presentation

Page 2: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

Appl. Phys. Lett. 95, 041106(2009)

Page 3: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

Outline

• Introduction• Begin with Maxwell Equation• Mathematica• Comsol

Page 4: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

0

0

E(r,t) E (r)

H(r,t) H (r)i te

��������������������������������������������������������

��������������������������������������������������������

00

0

E (r)

H (r)ik ns rik re e

e eh h

��������������������������������������������������������

��������������������������������������������������������

0

0 0

2 2 2k s s ns

( )S r ns r

real scalar function of position

Page 5: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

0

1

0

1

D

BE

c t

B

DH

c t

��������������

����������������������������

��������������

����������������������������

0

0 0 0

0

0 0 0

0

0

0

0

E

E ik H

H

H ik E

��������������

����������������������������

��������������

����������������������������

0

0

E(r,t) E (r)

H(r,t) H (r)i te

��������������������������������������������������������

��������������������������������������������������������

00

0

E (r)

H (r)ik See

h

������������������������������������������

������������������������������������������

0

0

0

0

1( ln )

1

1( ln )

1

e S e eik

S e h eik

h S h hik

S h e hik

0

0

0

0

e S

S e h

h S

S h e

Short Wave Limit 0k

2 2( )S n

n

Page 6: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

2 2( )S n

n

0

0

0

0

e S

S e h

h S

S h e

SS

n

��������������

S Ss

n S

drn Sds

Page 7: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

d drn n

ds ds

Uniform Medium : n=const.2

20

d r

ds

Straight Line

Page 8: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

0 2 2 2

r

R

dc

n c

( )n n r

Appl. Phys. Lett. 95, 041106(2009).nd const Bigger n!

Page 9: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

Outline

• Introduction• Begin with Maxwell Equation• Mathematica• Comsol

Page 10: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

.n const

0 2 2 2

r

R

dc

n c

Page 11: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

11

nr

0 2 2 2

r

R

dc

n c

Page 12: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

0 2 2 2

r

R

dc

n c

11

2nr

Page 13: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

0 2 2 2

r

R

dc

n c

1rn

Page 14: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

1

1.73 ,3

Rn

r

1/ 2

,10

Rn k

r

Page 15: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

Outline

• Introduction• Begin with Maxwell Equation• Mathematica• Comsol

Page 16: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

1n

r1n

Page 17: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation
Page 18: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

•There are solutions of Maxwell equation in short wavelength to describe geometrical optics.

•With designed refractive index(mainly ε), we can control the path of light such as blackhole.

Page 19: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

Prof. Zhifang LinProf. Zhifang LinWeihua WangWeihua WangLianxi ChengLianxi Cheng

林志方 教授林志方 教授王伟华王伟华程恋茜程恋茜

Page 20: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

Derivation of the eikonal equation

21[( ) ( ) ] 0e S S e S e

=02 2( )S n n

0

0

0

0

e S

S e h

h S

S h e

Page 21: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

Differential Equation of Optical Path

drn Sds

d dr

nds ds

2

2

( )

1( )

1[( ) ]

21

2

dS

ds

drS

ds

S Sn

Sn

nnn

d drn n

ds ds

Page 22: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

22

( )sin

( )

r

drr

d

sin .nr const

2 2 2dr rn r c

d c 0 2 2 2

r

R

dc

n c

Page 23: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

d dr dr ns ns r ns

ds ds ds

0s ns

r n

r dnn

r dr

( )n n r

0r dn

rr dr

.r ns const

sin .nr const

.nd const

Page 24: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

1d sK v

ds

����������������������������

Curvature Vector Unit Normal Line Vector

d drn n

ds ds

dn

nK n sds

����������������������������

( )dn

K nK K n sds

��������������������������������������������������������

1lnK v n

����������������������������

Page 25: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

•Incident wave•Decay range•Symmetry

Page 26: Something About Optical Blackhole Li Li ( 李力 ) Dept. Phys., Fudan Univ. Aiki.Nogard@gmail.com 091229 ED 10min presentation

1

4

Rn

r 2

Rn

r