Demonstration of an ultraviolet 336 nm AlGaN multiple-quantum-well laser diode

Yoshida, Harumasa; Yamashita, Yoji; Kuwabara, Masakazu; Kan, Hirofumi
December 2008
Applied Physics Letters;12/15/2008, Vol. 93 Issue 24, p241106
Academic Journal
We have demonstrated laser operation of an AlGaN multiple-quantum-well (MQW) laser diode (LD) with a peak wavelength of 336.0 nm under pulsed current mode at room temperature. The LD was fabricated on a low-dislocation-density Al0.3Ga0.7N grown on a sapphire substrate using a hetero-facet-controlled epitaxial lateral overgrowth method. The laser emission is strongly transverse electric polarized with a peak output power of 3 mW and a differential external quantum efficiency of 1.1%. This demonstration of the LD lasing in ultraviolet-AII spectral band (320–340 nm) suggests that the AlGaN MQW LDs can be potent devices opening a path to deeper ultraviolet LDs.


Related Articles

  • Improved Subfilter-Scale Models from the HATS Field Data. Hatlee, Stephen C.; Wyngaard, John C. // Journal of the Atmospheric Sciences;May2007, Vol. 64 Issue 5, p1694 

    An earlier paper proposed simple rate-equation models for subfilter-scale (SFS) scalar flux and deviatoric stress in the terra incognita—that is, in numerical modeling applications where the filter (grid-mesh) scale is of the order of the scale of the turbulence. Here the physics in these...

  • Self-assembly of functionally gradient nanoparticle structures. Jonghyun Park; Wei Lu // Applied Physics Letters;12/15/2008, Vol. 93 Issue 24, p243109 

    Morphology control of binary nanoparticles in an electric field was investigated by a computational model. The study revealed rich patterning dynamics and how collective actions of relative permittivity, volume fraction, and particle size can lead to a wide range of superlattice structures from...

  • Low-temperature experimental studies in molecular biophysics: a review. Blagoi, Yu.P.; Sheina, G.G. // Low Temperature Physics;Oct99, Vol. 25 Issue 10, p747 

    Describes the development and realization of academician Boris I. Verkin's ideas at the Molecular Biophysics Department of the Institute for Low Temperature Physics and Engineering in Kharkov, Ukraine. Studies of physical and chemical properties of biopolymer fragments and biologically active...

  • PbSe quantum well mid-infrared vertical external cavity surface emitting laser on Si-substrates. Fill, M.; Khiar, A.; Rahim, M.; Felder, F.; Zogg, H. // Journal of Applied Physics;May2011, Vol. 109 Issue 9, p093101 

    Mid-infrared vertical external cavity surface emitting lasers based on PbSe/PbSrSe multi-quantum-well structures on Si-substrates are realized. A modular design allows growing the active region and the bottom Bragg mirror on two different Si-substrates, thus facilitating comparison between...

  • Demonstrating Penetration of Electric Field of Incident Beam Into Rarer Medium During Total Internal Reflection. Aggarwal, Ved Ratna; Kumar, Suresh // AIP Conference Proceedings;7/30/2010, Vol. 1263 Issue 1, p201 

    During total internal reflection of a beam of light in a denser medium, its electric field penetrates into the rarer medium, up to a distance of the order of wavelength. Thus, if same denser medium is also placed at a gap of the order of wavelength, reflection is partial. In this low-cost...

  • Electron spectrum and scattering of charge carriers in PbTe:(Na + Te). Prokofieva, L. V.; Pshenay-Severin, D. A.; Konstantinov, P. P.; Shabaldin, A. A. // Semiconductors;Sep2009, Vol. 43 Issue 9, p1155 

    Within the framework of the two-band model with the interband scattering taken into account, the concentration dependences of kinetic coefficients in PbTe:(Na + Te) were calculated in the range of 100–300 K. The results of the comparison between calculated and experimental data for...

  • Student Difficulties in Understanding Probability in Quantum Mechanics. Sadaghiani, Homeyra; Lei Bao // AIP Conference Proceedings;2006, Vol. 818 Issue 1, p61 

    We have investigated student difficulties in understanding and interpreting probability and its relevant technical terms as it relates to quantum measurement. These terms include expectation value, probability density, and uncertainty. From this research, it is evident that students have...

  • Demonstration of multilevel cell spin transfer switching in MgO magnetic tunnel junctions. Xiaohua Lou; Zheng Gao; Dimitrov, Dimitar V.; Tang, Michael X. // Applied Physics Letters;12/15/2008, Vol. 93 Issue 24, p242502 

    Multilevel cell is an important concept to improve the density of spin transfer torque memory. We demonstrated two-bit multilevel cell spin transfer switching using MgO-based magnetic tunnel junctions. Two types of cell structural design are discussed. Multiple resistance levels are depicted in...

  • A parallel study of Ni@Si12 and Cu@Si12 nanoclusters. Zdetsis, A. D.; Koukaras, E. N.; Garoufalis, C. S. // Journal of Mathematical Chemistry;Oct2009, Vol. 46 Issue 3, p971 

    The Ni@Si12 and Cu@Si12 clusters are studied in parallel within the framework of the density functional theory using the hybrid functional of Becke-Lee, Parr and Yang (B3LYP), emphasizing the differences and similarities in structural and electronic properties. The dominant structures for both...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics