Reduction in threshold current density of 355 nm UV laser diodes

2011 ◽  
Vol 8 (5) ◽  
pp. 1564-1568 ◽  
Author(s):  
Kengo Nagata ◽  
Kenichiro Takeda ◽  
Kentaro Nonaka ◽  
Tomoki Ichikawa ◽  
Motoaki Iwaya ◽  
...  
Keyword(s):  
Current Density ◽  
Laser Diodes ◽  
Threshold Current ◽  
Threshold Current Density ◽  
Uv Laser

InGaN/GaN/AlGaN-Based Leds and Laser Diodes

1998 ◽  
Vol 537 ◽  
Author(s):  
S. Nakamura ◽  
M. Senoh ◽  
S. Nagahama ◽  
N. Iwasa ◽  
T. Matushita ◽  
...  
Keyword(s):  
Quantum Well ◽  
Leakage Current ◽  
Output Power ◽  
Current Density ◽  
Laser Diodes ◽  
Threshold Current ◽  
Threshold Current Density ◽  
Nonradiative Recombination ◽  
Window Region ◽  
Recombination Centers

AbstractInGaN quantum-well-structure blue LEDs were grown on epitaxially laterally overgrown GaN (ELOG) and sapphire substrates. The output power of both LEDs was as high as 6 mW at a current of 20 mA. The LED on sapphire had a considerable amount of leakage current in comparison with that on ELOG. These results indicate that In composition fluctuation is not caused by threading dislocations (TDs), free carriers are captured by radiative recombination centers before they are captured by nonradiative recombination centers in InGaN, and that the dislocations form the leakage current pathway in InGaN. Red LED with an emission peak wavelength of 650 nm was fabricated by increasing the In composition and thickness of InGaN well layer. When the laser diodes (LD) was formed on the GaN layer above the SiO2 mask region, the threshold current density was as low as 3 kAcm-2. When the LD was formed on the window region, the threshold current density was as high as 6 to 9 kAcm-2. There is a possibility that a leakage current due to a large number of TDs caused the high threshold current density on the window region. InGaN multi-quantum-well (MQW) structure LDs grown on the ELOG substrate showed an output power as high as 420 mW under RT-CW operation. The longest lifetime of 9,800 hours at a constant output power of 2 mW was achieved. The InGaN MQW LDs were fabricated on a GaN substrate. The fundamental transverse mode was observed up to an output power of 80 mW.

scholarly journals Green laser diodes with low threshold current density via interface engineering of InGaN/GaN quantum well active region

2017 ◽  
Vol 25 (1) ◽  
pp. 415 ◽  
Author(s):  
Aiqin Tian ◽  
Jianping Liu ◽  
Liqun Zhang ◽  
ZengCheng Li ◽  
Masao Ikeda ◽  
...  
Keyword(s):  
Active Region ◽  
Quantum Well ◽  
Current Density ◽  
Laser Diodes ◽  
Threshold Current ◽  
Green Laser ◽  
Threshold Current Density ◽  
Interface Engineering ◽  
Low Threshold

Optimised Implantation-Induced Disordering for Lowering the Threshold Current Density of II-VI Laser Diodes

2000 ◽  
Vol 180 (1) ◽  
pp. 213-216 ◽  
Author(s):  
O. Schulz ◽  
M. Strassburg ◽  
U.W. Pohl ◽  
D. Bimberg ◽  
S. Itoh ◽  
...  
Keyword(s):  
Current Density ◽  
Laser Diodes ◽  
Threshold Current ◽  
Threshold Current Density
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