MSE Supplies is a trusted partner globally in helping to enable innovations. We have supplied materials, equipment and lab supplies to over 2000 research laboratories and companies worldwide. We are a U.S. based supplier helping the advancement of research in fields such as materials science, photovoltaics, energy storage, semiconductors, optical materials, biomedical research, and basic science research, to name a few.
In this article, we highlight a recent research work using our products that has been presented at an optical conference and submitted for publication in a peer reviewed journal.
Researchers at the CREOL and the Dept. of Electrical and Computer Engineering both housed at the University of Central Florida have presented work on optical modes in unpatterned waveguides. To accomplish this work, they purchased <001> oriented MgF2 single crystal substrates from us here at MSE Supplies.
The research focuses on using an unpatterned planar two-dimensional optical film which tend to exhibit low losses. To achieve this, they took the MgF2 crystal substrate purchased from MSE Supplies and deposited a 2 µm layer of SiO2 on it via e-beam evaporation. Using a femtosecond pulsed Ti:sapphire laser that was aimed into a diffraction grating setup, they created their “space time” wave packets by passing the light into a spatial light modulator. This was then focused into the unpatterned waveguide.
FIG. (a-c) Propagation of a traditional Gaussian wave packet with separable spatial and temporal degrees of freedom in the film. (a) Intensity at the input (b) at the output of the film. (c) One-dimensional distribution through the center of (a) and (b). Inset shows the plot on a wider horizontal scale. (d-f) Same as (a-c) for an ST wave packet at the input (θ1=40◦) having the same width as the Gaussian wave packet in (a). In contrast to the traditional Gaussian wave packet, here the input and output intensity profiles are almost identical.
They were able to demonstrate a tunability of the group index modes from 1.26 to 1.77 which were centered around 1.47. This is the verified index of the planar waveguide. While achieving this index range, the researchers were able to maintain a spectrally flat zero-dispersion profile.
Reference: Work presented at and by: A. Shiri, M. Yessenov, S. Webster, K. L. Schepler, and A. F. Abouraddy, "Space-Time Wave Packets Wave-Guided in an Unpatterned Thin Film," in Conference on Lasers and Electro-Optics, OSA Technical Digest (Optical Society of America, 2020), paper FW4B.5. Link to submitted paper: https://arxiv.org/pdf/2001.01991.pdf
This is just one of our high quality single crystal substrates. MSE Supplies has a vast array of single crystal, wafer and substates for applications ranging from LEDs, ferroelectric, electro-optical, semiconductors, and high frequency power devices just to name a few. We look forward to working with you and supporting your successful research projects.
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