The authors experimentally demonstrate strong light confinement and enhancement of emission at 1.54μm in planar silicon-on-insulator waveguides containing a thin layer (slot) of SiO2 with Er3+ doped Si nanoclusters. Angle-resolved attenuated total reflectance is used to excite the slab guided modes, giving a direct evidence of the strong confinement of the electric field in the low-index active material for the fundamental transverse-magnetic mode. By measuring the guided photoluminescence from the cleaved-edge of the sample, the authors observe a more than fivefold enhancement of emission for the transverse-magnetic mode over the transverse-electric one. These results show that Si-based slot waveguides could be important as starting templates for the realization of Si-compatible active optical devices.

1.
Y. A.
Vlasov
and
S. J.
McNab
,
Opt. Express
12
,
1622
(
2004
).
2.
K. K.
Lee
,
D. R.
Lim
,
L. C.
Kimerling
,
J.
Shin
, and
F.
Cerrina
,
Opt. Lett.
26
,
1888
(
2001
).
3.
V. R.
Almeida
,
Q.
Xu
,
C. A.
Barrios
, and
M.
Lipson
,
Opt. Lett.
29
,
1209
(
2004
).
4.
Q.
Xu
,
V. R.
Almeida
,
R. R.
Panepucci
, and
M.
Lipson
,
Opt. Lett.
29
,
1626
(
2004
).
5.
C. A.
Barrios
and
Michal
Lipson
,
Opt. Express
13
,
10092
(
2005
).
6.
F.
Priolo
,
G.
Franzò
,
D.
Pacifici
,
V.
Vinciguerra
,
F.
Iacona
, and
A.
Irrera
,
J. Appl. Phys.
89
,
264
(
2001
).
7.
H. S.
Han
,
S. Y.
Seo
, and
J. H.
Shin
,
Appl. Phys. Lett.
79
,
4568
(
2001
).
8.
F.
Iacona
,
D.
Pacifici
,
A.
Irrera
,
M.
Miritello
,
G.
Franzò
,
F.
Priolo
,
D.
Sanfilippo
,
G.
Di Stefano
, and
P. G.
Fallica
,
Appl. Phys. Lett.
81
,
3242
(
2002
).
10.
M.
Galli
,
M.
Belotti
,
D.
Bajoni
,
M.
Patrini
,
G.
Guizzetti
,
D.
Gerace
,
M.
Agio
,
L. C.
Andreani
, and
Y.
Chen
,
Phys. Rev. B
70
,
081307
(
2004
).
11.
P.
Yeh
and
A.
Yariv
,
Optical Waves in Crystals
(
Wiley
,
New York
,
1984
).
12.

Dispersion of the refractive indices is taken into account in order to get an agreement in the whole spectral range.

13.
J.
Valenta
,
I.
Pelant
, and
J.
Linnros
,
Appl. Phys. Lett.
81
,
1396
(
2002
).
14.
L.
Dal Negro
,
P.
Bettotti
,
M.
Cazzanelli
,
D.
Pacifici
, and
L.
Pavesi
,
Opt. Commun.
229
,
337
(
2004
).
You do not currently have access to this content.