Optically pumped lasing of ZnSe at room temperature

Abstract

Optically pumped lasing of (111) oriented bulk ZnSe grown by seeded physical vapor phase transport (SPVT) technique has been achieved at room temperature under near resonant pumping with the excitation photon energy very close to the fundamental band gap. Laser emission can be seen at a pumping intensity as low as 7 kW/cm2. The lasing mode spacings resulting from the dispersion of the index of refraction for ZnSe in a Fabry–Perot resonator-like cavity have been observed as well. Our experimental results demonstrate that SPVT ZnSe single crystals have the quality sufficient to develop low-threshold, high-power output blue lasers.

Above room temperature near ultraviolet lasing from an optically pumped GaN film grown on sapphire

“…The optical pumping system is very similar to that used in our previous ZnSe lasing work. 12,13 A tunable dye laser pumped by a frequencydoubled pulsed Nd:YAG laser was used as the primary optical pumping source. The output of the dye laser was then frequency doubled to achieve a near UV pumping frequency.…”

Vapor growth of typical II-VI wide-gap semiconductor crystals directly from the constituent elements

“…II-VI wide-gap semiconductors such as ZnE (E = Se, Te), have recently attracted wide attention due to their technological importance for optoelectronic devices such as light-emitting-diodes, nonlinear optic-electronic components and THz spectrometer [1][2][3]. The development of these applications and techniques seriously depends on the preparation of high-quality crystals with low cost, their bulk growth is then of strategic interests.…”

Two-photon absorption and stimulated emission in poly-crystalline Zinc Selenide with femtosecond laser excitation

“…Also, it is intensively identified as a suitable material for blue-light-emitting diodes and lasers sources. Such sources can be applied in a broad range of applications, including compact displays, optical storage in high-density DVDs and biomedical diagnostics 3,4 . It is therefore interesting to study its properties such as absorption coefficient, nonlinear (NL) response and refractive index since ZnSe is promising for future applications in blue-violet electroluminescent devices.…”