Midwavelength Infrared Photoluminescence and Lasing of Tellurium Elemental Solid and Microcrystals.

Author(s) Choi, D.; Jeong, K.Seob
Journal J Phys Chem Lett
Date Published 2019 Jul 18
Abstract

Tellurium has been of great interest in physics, chemistry, material science, and more recently in nanoscience. However, information on the photoluminescence of Te crystals, crucial in understanding the material, has never been disclosed. Here, we present photoluminescence and lasing for the Te bulk crystal and microcrystals. Photoluminescence of Te bulk solid crystal was observed at 3.75 μm in the midwavelength infrared (MWIR) region, matching the theoretically predicted value well. With increasing the photoexcitation intensity or decreasing temperature, we successfully observed MWIR random lasing of the bulk Te crystals at 3.62 μm. Furthermore, the rod-shaped Te microcrystals efficiently exhibit second harmonic and third harmonic lasing at MWIR and short-wavelength infrared regions, respectively. Nonlinear coherent MWIR lasing from the Te microcrystals will serve as an excellent mid-IR light source, opening up new applications in infrared photonics, extremely long-depth penetration bioimaging, and optoelectronics.

DOI 10.1021/acs.jpclett.9b01523
ISSN 1948-7185
Citation Choi D, Jeong KS. Midwavelength Infrared Photoluminescence and Lasing of Tellurium Elemental Solid and Microcrystals. J Phys Chem Lett. 2019:4303-4309.