Projects per year
Wide bandgap II-VI semiconductors, lattice-matched to InP substrates, show promise for use in novel, visible wavelength photonic devices; however, release layers for substrate removal are still under development. An under-etch method is reported which uses an InP substrate as an effective release layer for the epitaxial lift-off of lattice-matched ZnCdMgSe membranes. An array of 100-pm-square membranes is defined on a ZnCdMgSe surface using dry etching and suspended from the InP substrate using a three-step wet etch. The ZnCdMgSe membranes are transfer-printed onto a diamond heatspreader and have an RMS surface roughness < 2 nm over 400 |jm 2, similar to the epitaxial surface. Membranes on diamond show a photoluminescence peak at ∼520 nm and a thermal redshift of 4 nm with ∼3.6 MWm −2 continuous optical pumping at 447 nm. Effective strain management during the process is demonstrated by the absence of cracks or visible membrane bowing and the high brightness photoluminescence indicates a minimal non-radiative defect introduction. The methodology presented will enable the heterogeneous integration and miniaturization of II-VI membrane devices.
- II-VI semiconductors
- heterogeneous integration
- transfer printing
- epitaxial lift-off
FingerprintDive into the research topics of 'Suspension and transfer printing of ZnCdMgSe membranes from an InP substrate'. Together they form a unique fingerprint.
1/12/19 → 30/11/24
Littlejohn, D., Anaya-Lara, O., Ault, G., Bennet, D. J., Birch, D., Booth, C., Burt, G., Chen, Y., Chen, H., Fedorov, M., Finney, S., Fletcher, A., Gu, E., Guilhabert, B. J. E., Hastie, J., Jaroszynski, D., Johnston, A., Judd, M., Kockar, I., Lamprou, D., Laurand, N., Macdonald, M., Massoubre, D., Mathieson, K., McKnight, L., Nordon, A., Norman, P., Oliveira, M., Papoff, F., Patwardhan, S., Portugues, I., Scanlon, T., Sefcik, J., Seib, P., Skabara, P., Stack, M., Stephen, B., Tuttle, T., Ulijn, R., Xiao, Q., Yan, X., Zagnoni, M., Dawson, M., Florence, A., Graham, D., McArthur, S., Reese, J., Zhang, Y., Ivanistsev, V., Jawor-Baczynska, A. M., Jones, C., McGlone, T. & McKendry, J.
1/04/12 → 31/03/13
Chappell, G. (Creator), Guilhabert, B. J. E. (Contributor), Garcia, T. (Contributor), Zhao, K. (Contributor), Watson, I. (Contributor), Dawson, M. (Contributor), Tamargo, M. (Contributor) & Hastie, J. (Supervisor), University of Strathclyde, 11 Nov 2020