Highly efficient, spatially coherent distributed feedback lasers from dense colloidal quantum dot films

被引：38

作者：

Dang, C. ^{[1
]}

Lee, J. ^{[1
]}

Roh, K. ^{[2
]}

Kim, H. ^{[3
]}

Ahn, S. ^{[3
]}

Jeon, H. ^{[3
]}

Breen, C. ^{[4
]}

Steckel, J. S. ^{[4
]}

Coe-Sullivan, S. ^{[4
]}

Nurmikko, A. ^{[1
,2
]}

机构：

[1] Brown Univ, Sch Engn, Providence, RI 02912 USA

[2] Brown Univ, Dept Phys, Providence, RI 02912 USA

[3] Seoul Natl Univ, Dept Phys & Astron, Seoul 151747, South Korea

[4] QD Vis Inc, Lexington, MA 02421 USA

来源：

APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 17期

基金：

美国国家科学基金会;

关键词：

OPTICAL GAIN; EMISSION;

D O I：

10.1063/1.4826147

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Colloidal quantum dots (CQD) are now making their entry to full-color displays, endowed by their brightness and single-material base. By contrast, many obstacles have been encountered in their use towards lasers. We demonstrate here optically pumped distributed feedback (DFB) lasers, based on close-packed, solid films self-assembled from type-I CQDs. Notably, the single mode CQD-DFB lasers could reach such a low threshold as to be pumpable with a compact pulsed source in a quasi-continuous wave regime. Our results show the spatially and temporally coherent laser beam outputs with power of 400 mu W and a quantum efficiency of 32%. (C) 2013 AIP Publishing LLC.

引用

页数：5

共 26 条

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