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Internal laser characteristics of optically pumped yellow–orange lasers
Author(s) -
Alyamani Ahmed,
Lutsenko Evgenii V.,
Gronin Sergey V.,
Vainilovich Aliaksei G.,
Pavlovskii Viacheslav N.,
Yablonskii Gennadii P.,
Tarasuk Nikolai P.,
Aljohani Maher,
Aljariwi Abdulaziz,
Sorokin Sergey V.,
Sedova Irina V.,
Ivanov Sergey V.
Publication year - 2016
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201600125
Subject(s) - laser , lasing threshold , materials science , wavelength , optoelectronics , optics , optical cavity , orange (colour) , physics
Internal laser characteristics of two heterostructures with an active region based on CdSe quantum dots (QDs) embedded in a complex (2–3) nm ZnCdSe/ZnSe quantum well (QW) were determined by measuring the differential laser efficiency and the laser threshold of a set of samples with different cavity lengths. Due to changing the CdSe QD nominal thickness and the ZnCdSe QW composition, the lasing wavelength for the two structures was tuned over wide ranges: green–yellow (556–573 nm) and yellow–orange (583–593 nm), depending on the cavity length. Maximum optical characteristic gain and internal quantum efficiency were measured as high as ГG 0 = 54 cm −1 , η i = 83% (for green–yellow structure) and ГG 0 = 81 cm −1 , η i = 72% (for yellow–orange one), while the transparency threshold I T was lower for the former structure: 0.6 vs. 1.2 kW cm −2 , with the internal optical loss of α i ∼ 4.6 cm −1 being equal for both structures. The possible reasons of the high value of the characteristic gain as well as the long‐wavelength shift of the QDs emission are discussed.