Transcript poster

MID-INFRARED SEMICONDUCTOR WGM LASERS
A.Yu.Kislyakova, N.S.Averkiev, A.P.Astakhova, E.A.Grebenshikova, N.D.Il’inskaya, S.S.Kizhaev, A.M.Monakhov, V.V.Sherstnev, Yu.P.Yakovlev
Whispering gallery modes- universal linear
excitations of circular and annular resonators
Circular dome of St. Paul’s Cathedral in London
Were first observed in 1910 in the form
of sound wave travelling along the outer wall
Lord Rayleigh
Referring to the acoustic phenomenon the name “whispering gallery modes” was also coined
for electromagnetic eigenmodes of circular resonators.
Development of electrically pumped WGM semiconductor lasers for the mid-infrared waverange
The spectral range of 3-5 µm is very important for applications based on molecular spectroscopy
-window of atmospheric
transparency
- it contains strong absorption lines
of hazardous or explosive gases
I = 2.5 A
30
 = 1.0 S
f = 8 kHz
T = 150 K
We have obtained laser emission in the mid-IR at 3 mkm
from a ring resonator DH diode fabricated by MOCVD.
Also we analyzed the current spreading in 3d ring laser
structures using methods of numerical mathematical modeling.
Coherent emission was observed at temperatures up to 125 K
and was thought to originate from a whispering gallery mode.
Optical Power, a.u.
Slit 0.5x0.5 mm
d = 200 m
T = 130 K
T = 121 K
20
T = 112 K
10
T = 96 K
T = 81 K
V2230R
0
3.00
3.03
3.06
3.09
3.12
3.15
Wavelength, m
The results obtained earlier will be combined to realise room temperature mid-IR WGM lasers