Gallium nitride on gallium oxide substrate for integrated nonlinear optics
KAUST DepartmentMaterial Science and Engineering Program
Physical Science and Engineering (PSE) Division
Semiconductor and Material Spectroscopy (SMS) Laboratory
Online Publication Date2017-11-22
Print Publication Date2017-06
Permanent link to this recordhttp://hdl.handle.net/10754/626199
MetadataShow full item record
AbstractGallium Nitride (GaN), being a direct bandgap semiconductor with a wide bandgap and high thermal stability, is attractive for optoelectronic and electronic applications. Furthermore, due to its high optical nonlinearity — the characteristic of all 111-V semiconductors — GaN is also expected to be a suitable candidate for integrated nonlinear photonic circuits for a plethora of apphcations, ranging from on-chip wavelength conversion to quantum computing. Although GaN devices are in commercial production, it still suffers from lack of a suitable substrate material to reduce structural defects like high densities of threading dislocations (TDs), stacking faults, and grain boundaries. These defects significandy deteriorate the optical quality of the epi-grown GaN layer, since they act as non-radiative recombination centers. Recent studies have shown that GaN grown on (−201) β-Gallium Oxide (Ga<inf>2</inf>O<inf>3</inf>) has superior optical quality due to a better lattice matching as compared to GaN grown on Sapphire (Al<inf>2</inf>O<inf>3</inf>) [1-3]. In this work, we report on the fabrication of GaN waveguides on GaiOj substrate and their optical characterization to assess their feasibihty for efficient four-wave mixing (FWM).
CitationAwan KM, Dolgaleva K, Muhammed MM, Roqan IS (2017) Gallium nitride on gallium oxide substrate for integrated nonlinear optics. 2017 Photonics North (PN). Available: http://dx.doi.org/10.1109/PN.2017.8090587.
Journal2017 Photonics North (PN)
Showing items related by title, author, creator and subject.
Threshold-Based Multiple Optical Signal Selection Scheme for Free-Space Optical Wavelength Division Multiplexing SystemsNam, Sung Sik; Alouini, Mohamed-Slim; Zhang, Lin; Ko, Young-Chai (Journal of Optical Communications and Networking, The Optical Society, 2017-11-15) [Article]We propose a threshold-based multiple optical signal selection scheme (TMOS) for free-space optical wavelength division multiplexing systems. With this scheme, we can obtain higher spectral efficiency while reducing the possible complexity of implementation caused by the beam-selection scheme and without a considerable performance loss. To characterize the performance of our scheme, we statistically analyze the operation characteristics under conventional detection conditions (i.e., heterodyne detection and intensity modulation/direct detection techniques) with log-normal turbulence while taking into consideration the impact of pointing error. More specifically, we derive exact closed-form expressions for the outage probability, the average bit error rate, and the average spectral efficiency while adopting an adaptive modulation. Some selected results show that TMOS increases the average spectral efficiency while maintaining a minimum average bit error rate requirement.
Optical force on diseased blood cells: Towards the optical sorting of biological matterGongora, J. S. Totero; Fratalocchi, Andrea (Optics and Lasers in Engineering, Elsevier BV, 2015-05-21) [Article]By employing a series of massively parallel ab-initio simulations, we study how optical forces act on biological matter subject to morphological disease. As a representative case study, we here consider the case of Plasmodium falciparum on red blood cells (RBC) illuminated by a monochromatic plane wave. Realistic parameters for the geometry and the refractive index are then taken from published experiments. In our theoretical campaign, we study the dependence of the optical force on the disease stage for different incident wavelengths. We show that optical forces change significantly with the disease, with amplitude variation in the hundreds of pN range. Our results open up new avenues for the design of new optical systems for the treatment of human disease. © 2015 Elsevier Ltd.
3D printed Polarization Micro-Optics: Fresnel Rhomb printed on an optical fiberBertoncini, Andrea; Liberale, Carlo (Advanced Photonics 2018 (BGPP, IPR, NP, NOMA, Sensors, Networks, SPPCom, SOF), The Optical Society, 2018-06-28) [Conference Paper]A miniaturized and fiber-integrated Fresnel Rhomb has been 3D printed with Direct Laser Writing on a polarization-maintaining fiber to act as a broadband quarter waveplate, allowing generation of circularly polarized light.