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Light induced tuning of quantum cascade lasers
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10.1063/1.3473780
/content/aip/journal/apl/97/5/10.1063/1.3473780
http://aip.metastore.ingenta.com/content/aip/journal/apl/97/5/10.1063/1.3473780
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Absorbance spectra of a 230 nm thick film of spiropyran and merocyanine in PS. The inset depicts the shift in the absorbance minima around as a function of time of irradiation with 365 nm UV light.

Image of FIG. 2.
FIG. 2.

Emission spectra for QCLs at room temperature with (a) , (b) , and (c) ridge widths. The top spectrum shows the emission of the uncoated laser, the middle spectrum stems from the same lasers after spiropyran coating. The bottom spectrum is obtained after irradiation with UV light, converting the cladding to its mero state.

Image of FIG. 3.
FIG. 3.

Shift in the emission of a ridge QCL with spiropyran coating as a function of time of irradiation as follows: (a) shows the spectra recorded at room temperature under irradiation with a 365 nm UV lamp, (b) shows the shift in the center wavelength, and (c) shows the emitted power [area underneath the laser peak in part (a)] with time of irradiation.

Image of FIG. 4.
FIG. 4.

LIV characteristics at room temperature for an (a) 60 and (b) wide ridge laser without cladding (native), with native cladding (spiro), and with cladding after UV irradiation (mero).

Image of FIG. 5.
FIG. 5.

Shift in the emission of a ridge QCL with spiropyran coating as a function of UV irradiation time at 180 K as follows: (a) shows the spectra recorded at room temperature under irradiation with a 365 nm UV lamp, (b) shows the shift in the center wavelength and the emitted power [area underneath the laser peak in part (a)] with the irradiation time, and (c) shows the LIV characteristics in the spiro and mero state.

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/content/aip/journal/apl/97/5/10.1063/1.3473780
2010-08-03
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Light induced tuning of quantum cascade lasers
http://aip.metastore.ingenta.com/content/aip/journal/apl/97/5/10.1063/1.3473780
10.1063/1.3473780
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