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centers in intracenter Si:P lasers
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10.1063/1.1922091
/content/aip/journal/jap/97/11/10.1063/1.1922091
http://aip.metastore.ingenta.com/content/aip/journal/jap/97/11/10.1063/1.1922091

Figures

Image of FIG. 1.
FIG. 1.

Energy diagram of optical (vertical arrows) and nonradiative (diagonal arrows) transitions in the Si:P laser. Note the terahertz absorption due to transitions from centers into the conduction band.

Image of FIG. 2.
FIG. 2.

Concentration of centers (dash) and state population (solid) in Si:P (donor concentration ) as a function of the pump photon flux density (pump intensity) for different compensation (shown in %), (a) in logarithmic scale and (b) in linear scale for the pump intensities between 0 and .

Image of FIG. 3.
FIG. 3.

Amplification at for different compensation (shown in %) as a function of pump photon flux density , (a) in logarithmic scale and (b) in linear scale for the pump intensities between 0 and .

Image of FIG. 4.
FIG. 4.

Experimental setup. 1, light pipes; 2, shutter to block radiation from the background; 3, silicon sample; 4, sapphire filter; 5, Ge:Ga or detector; , pump radiation from the laser; , spontaneous emission from the Si sample; , path of background radiation when shutter is open; and path of background radiation when shutter is closed.

Image of FIG. 5.
FIG. 5.

Temporal behavior of the total signal which includes both spontaneous emission (positive signal) and absorption of background radiation (negative signal) at pump intensity for (a) sample ND5 , (b) sample ND6 , and (c) sample ND7 (, background radiation blocked by a metal shutter).

Image of FIG. 6.
FIG. 6.

Spontaneous emission vs pump intensity for the ND5 (solid line) and ND7 (dashed line) samples. The thin dashed line is a linear guide for the eye.

Image of FIG. 7.
FIG. 7.

(a) Dependence of the center-induced absorption of background radiation on the pump intensity measured for samples with different compensation (shown in %). (b) Calculated population of centers as a function of pump intensity for samples with different compensation.

Image of FIG. 8.
FIG. 8.

Total signal (diamonds), spontaneous emission signal (circles), and absorption (squares) as a function of the pump intensity for the sample ND5 .

Image of FIG. 9.
FIG. 9.

Terahertz laser emission for Si:P samples with different compensation (shown in %).

Tables

Generic image for table
Table I.

Parameters of the investigated silicon samples.

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/content/aip/journal/jap/97/11/10.1063/1.1922091
2005-05-27
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: D− centers in intracenter Si:P lasers
http://aip.metastore.ingenta.com/content/aip/journal/jap/97/11/10.1063/1.1922091
10.1063/1.1922091
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