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A Random Laser Based on Hybrid Fluorescent Dye and Diamond Nanoneedles
Author(s) -
Duong Ngoc My Hanh,
Regan Blake,
Toth Milos,
Aharonovich Igor,
Dawes Judith
Publication year - 2019
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201800513
Subject(s) - lasing threshold , diamond , random laser , materials science , laser , optoelectronics , fluorescence , photonics , pillar , optics , dye laser , amplified spontaneous emission , spontaneous emission , radiative transfer , physics , structural engineering , composite material , engineering , wavelength
Random lasers use radiative gain and multiple scatterers in disordered media to generate light amplification. In this study, a random laser based on diamond nanoneedles that act as scatterers in combination with fluorescent dye molecules that serve as a gain medium has been demonstrated. Random lasers realized using diamond possess high spectral radiance with angle‐free emission and thresholds of 0.16 mJ. The emission dependence on the pillar diameter and density is investigated, and optimum lasing conditions are measured for pillars with spacing and density of ≈336 ± 40 nm and ≈2.9 × 10 10 cm −2 . Our results expand the application space of diamond as a material platform for practical, compact photonic devices, and sensing applications.