Open AccessObservation of green lasing at 537 nm from Er-ions by coupled photon–atom modes in a random cavity
Author(s) -
Van Hoi Pham,
Thuy Chi,
Huy Bui,
Thuy Van Nguyen
Publication year - 2011
Publication title -
advances in natural sciences nanoscience and nanotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.476
H-Index - 40
ISSN - 2043-6262
DOI - 10.1088/2043-6262/2/1/015004
Subject(s) - lasing threshold , atom (system on chip) , materials science , photon , atomic physics , laser , optical cavity , ion , doping , radiative transfer , photonic crystal , optics , optoelectronics , physics , quantum mechanics , computer science , embedded system
We present new results of a laser phenomenon that gives rise to a narrow green emission mode in a random photonic-crystal cavity based on an Er-doped glass–air gap–polymer with a 976 nm diode laser pump. Lasing occurs at 537 nm, which does not respond to the resonant radiative transition 2 H 11/2 → 4 I 15/2 ; 4 S 3/2 → 4 I 15/2 in Erbium ions. This effect can be seen as photon–atom coupling in the context of the interaction between a single atom and/or a few atoms and resonant optical media, such as cavities or photonic crystals. Experimental results show that the random lasing mode directly originates from the coupled photon–atom mode inside the random cavity. The measured Q -factor is of 2100–2800 for a random cavity with an air gap of 600–1700 nm between Er-doped glass fiber and a coated polymer layer.