Depletion of control field during the propagation

of ultraslow optical solitons

Speaker ： Hui-jun Li

Collaborator : Prof Guoxiang

Huang Field of Study: Nonlinear Physics and Nonlinear Optics

Outline 1. Introduction

2. Model

3. Numerical result on the evolution of probe and control fields

4. Summary

1. Introduction

Why do the EIT being important ？

1. Introduction

EIT

1

3

2

Changing the dispersion relationship,

the absorption and group velocity

Enhanced the Kerr nonlinearity

p c

2 ． Model

1

2

3

2

3

p c1 1 p 3

2 2 c 3

3 3 p 1 c 2

*p 13 3 1

*c 23 3 2

2p

p

2c

c

i d A A 0t

i d A A 0t

i d A A A 0t

1i A A 0

z c t

1i A A 0

c

z

c

c t

2

2

kw

kw

WW

W

W

W

W W

W

Model

j j j

-11

d

0 s

gD

D

2

a p(c) p(c) 13(23)

13(23)0

N ω e pκ =

2 ce

g

h

z

Adiabatons and soliton

12

3

p c

0 10 200

15

30

45

p

0

c

0

t/0

z= 0 cm z= 7.5 cm z= 15 cm z=22.5 cm z= 30 cm

12

3

2

3

pc

-3 0 3 6 90.0

1.5

3.0

t/0

z= 0 cm z=0.3 cm z=0.6 cm z=0.9 cm z=1.2 cm

3. Numerical result on the evolution of

probe and control fields

4. Summary

summary

1. Discuss the physical phenomenon between

adiabatons and soliton.

2. Supply the project to realize soliton in EIT

media.

Thank you！