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-18 ..

2003


1.

. ( ), ( ) . , , . : , , . . , . -.

, , , . , ( ), : χ. , , . = 0, > 0 . .

E, D H, B . , , [1]


(1.1)

(1.2)

(1.3)

(1.4)

,

(1.5)

, σ = σ1 + i σ2, ε0 = ε1 + i ε2, σ1 σ2, ε1, ε2 , ω. μ , ω; μ .

(1.1). ,

(1.2), (1.3) (1.5),

(1.6)

H [1].

( ≥ 0)

(1.7)

Em , , = 0, ξ E, k . , : . (1.7) (1.6),

(1.8)

, Em ≠ 0, k ω, . . .

σ' [1],

(1.9)

(1.9')

(1.10)

χ . . (1.10) (1.7).


(1.7)

χ = 0, . . , (1.7') , / . χ ≠ 0, .

α, [1]

(1.11)

α , , . (1.7') , ( ) ,

, α-1 , .

(1.11),

(1.11)

.

(1.10) (1.8) Em.

(1.12)

, n χ. [1]

(1.1)

(1.136)

(1.13, ) . -, σ'

(1.14)

ε1' ε2' . ,

(1.15)

, ,

(1.16)

(1.16)

(1.13, ) (1.16, ) , .

(1.16) , . , . , , , , . . .

[1].

. . σ1 = ε2 = 0. , (1.16, ),

χ = 0

(1.17)

, ε1'.

. . ω , . . ε1' > 0.

(1.18)

- (1.17),

: 1, 2, 3, 4