Development and testing of an experimental technique for using portable optical sources to study the photoconductivity processes of HPHT diamond

Gavrish M.V., Pogoda, A.P., Prokhorova U.V., Rozanov P.K., Boreisho, A.S., Solomnikova A.V., Emelyanov I.D., Telitsyn N.S., Zubkov V.I.

For Russian citation (Opticheskii Zhurnal):

Гавриш М.В., Погода А.П., Прохорова У.В., Розанов П.К., Сементин В.В., Борейшо А.С., Соломникова А.В., Емельянов И.Д., Телицын Н.С., Зубков В.И. Разработка и апробация экспериментальной методики использования портативных оптических источников для исследования процессов фотопроводимости HPHT-алмаза // Оптический журнал. 2026. Т. 93. № 4. С. 46–56. http://doi.org/10.17586/1023-5086-2026-93-04-46-56

Gavrish M.V., Pogoda A.P., Prokhorova U.K., Rozanov P.K., Boreysho A.S., Solomnikova A.V., Emelyanov I.D., Telitsyn N.S., Zubkov V.I. Development and testing of an experimental technique for using portable optical sources to study the photoconductivity processes of HPHT diamond [in Russian] // Opticheskii Zhurnal. 2026. V. 93. № 4. P. 46–56. http://doi.org/10.17586/1023-5086-2026-93-04-46-56

For citation (Journal of Optical Technology):

Abstract:

Subject of research. Optical properties of HPHT diamonds and their photoconductive response under excitation by portable narrow-band and broadband radiation sources. Purpose of work. Development and experimental verification of a methodology for studying the photoconductivity of HPHT diamonds using portable ultraviolet and visible range sources. Methods. Spectral measurements and a photoconductivity registration technique were employed, implemented using portable laser and LED sources. Main results. It has been established that semiconductor and solid-state laser radiation sources with a mass not exceeding 2 kg provide sufficient power density (1–100 mW/cm2) to excite photoconductivity. In addition to continuous-wave, pulsed generation modes were considered, allowing an increase in peak power density without additional thermal impact on the sample. The feasibility of using these sources for diagnosing impurity composition and studying defect levels in HPHT diamonds is demonstrated. Scientific novelty. The developed methodology forms a new approach to studying defect centers and charge carrier dynamics in wide-bandgap semiconductors outside specialized laboratory conditions, through the use of portable sources in the blue-violet spectral region. Practical significance. The developed methodology enables research on impurity composition and photoconductivity using mobile, energy-efficient, and cost-effective radiation sources, expanding the potential for laboratory and applied work in the fields of photonics and solid-state physics.

Keywords:

portable optical sources, ultraviolet radiation sources, laser, photoconductivity, monocrystalline diamond

Acknowledgements:

this work was financially supported by the Ministry of Education and Science of the Russian Federation within the framework of the State assignment “Fundamental research in the field of creating devices and technologies for the development of key nodes of high-speed laser space communication terminals” FZWF-2025-0002. R&D 125052706438-3. The study was done
with support of the state assignment for Saint Petersburg Electrotechnical University “LETI” (Theme No. FSEE-2025-0007)

OCIS codes: 140.3460, 040.5150

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