Observation of transparency of Erbium-doped silicon nitride in photonic crystal nanobeam cavities.
One dimensional nanobeam photonic crystal cavities are fabricated in an Er-doped amorphous silicon nitride layer. Photoluminescence from the cavities around 1.54 microm is studied at cryogenic and room temperatures at different optical pump powers. The resonators demonstrate Purcell enhanced absorption and emission rates, also confirmed by time resolved measurements. Resonances exhibit linewidth narrowing with pump power, signifying absorption bleaching and the onset of stimulated emission in the material at both 5.5 K and room temperature. We estimate from the cavity linewidths that Er has been pumped to transparency at the cavity resonance wavelength.
Gong
Yiyang
Y
Department of Electrical Engineering, Stanford University, Stanford, CA 94305, USA.
Makarova
Maria
M
Yerci
Selcuk
S
Li
Rui
R
Stevens
Martin J
MJ
Baek
Burm
B
Nam
Sae Woo
SW
Dal Negro
Luca
L
Vuckovic
Jelena
J
D004581:Electronics / Q000295:instrumentation; D004867:Equipment Design; D004871:Erbium / Q000737:chemistry*; D008163:Luminescent Measurements / Q000295:instrumentation*; D008855:Microscopy, Electron, Scanning; D008962:Models, Theoretical; D036103:Nanotechnology / Q000295:instrumentation*; D055095:Optics and Photonics / Q000295:instrumentation*; D017655:Silicon Compounds / Q000737:chemistry*; D013696:Temperature
D017655:Silicon Compounds; D004871:Erbium; C032734:silicon nitride