AI Article Synopsis
- The study explores the photorefractive effect in undoped aluminum nitride, focusing on how different pump intensities at a wavelength of 405 nm affect the coupling constant and formation rate.
- The measured photorefractive gain coefficient was 0.47 cm(-1) at a pump intensity of 6.9 W/cm(2), with the saturated value likely being higher.
- A time constant of 59 ms was recorded at 1.0 W/cm(2), and both a refractive index grating and an absorption grating were formed, the latter linked to ionized trap density modulation.
Article Abstract
We report our observation of the photorefractive effect in undoped aluminum nitride. We measured the coupling constant and the formation rate as a function of pump intensity at a wavelength of 405 nm in a two-wave mixing experiment. The photorefractive gain coefficient was 0.47 cm(-1) at I = 6.9 W/cm(2), and the actual saturated value was probably larger than this. The time constant was 59 ms at I = 1.0 W/cm(2). In addition to a refractive index grating, an absorption grating was also formed, which is attributed mainly to an ionized trap density modulation process.
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| http://dx.doi.org/10.1364/OL.35.002136 | DOI Listing |
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