CO2 laser radiation detection in compensated germanium

S. Bumeliene; Steponas P. Asmontas; Jonas Gradauskas; A. Jukna; J. Parseliunas; Dalius Seliuta; Algirdas Suziedelis; Gintaras Valusis

doi:10.1117/12.431207

26 June 2001 CO₂ laser radiation detection in compensated germanium

S. Bumeliene, Steponas P. Asmontas, Jonas Gradauskas, A. Jukna, J. Parseliunas, Dalius Seliuta, Algirdas Suziedelis, Gintaras Valusis

Author Affiliations +

Proceedings Volume 4423, Nonresonant Laser-Matter Interaction (NLMI-10); (2001) https://doi.org/10.1117/12.431207
Event: Nonresonant Laser-Matter Interaction (NLMI-10), 2000, St. Petersburg, Russian Federation

Abstract

We report the results of experimental study of IR radiation detection in a bulk of compensated germanium. Au or Ni with deep levels in the forbidden energy ap was used as compensating impurities. In spite of great difference in their activation energies the change of electrical resistance of the samples under CO₂ laser illumination indicated the similar rise of carrier density in the valence band which can not be explained only by means of direct hole activation character of the electrical conductivity of compensated semiconductors. Evaluation of spatial quantity of in-homogenates in compensated semiconductors confirmed the importance of energetic bands bending due to the existence of ionized impurities complexes for IR detection.

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S. Bumeliene, Steponas P. Asmontas, Jonas Gradauskas, A. Jukna, J. Parseliunas, Dalius Seliuta, Algirdas Suziedelis, and Gintaras Valusis "CO₂ laser radiation detection in compensated germanium", Proc. SPIE 4423, Nonresonant Laser-Matter Interaction (NLMI-10), (26 June 2001); https://doi.org/10.1117/12.431207

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