24 citations · 80 across the 7 of their papers we have counts for
7 papers
Lightweight Carbon Fiber Mirrors for Solar Concentrator Applications
Nina Vaidya, Michael D. Kelzenberg, Pilar Espinet-González +7
Lightweight parabolic mirrors for solar concentrators have been fabricated using carbon fiber reinforced polymer (CFRP) and a nanometer scale optical surface smoothing technique. T…
Extremely broadband ultralight thermally emissive metasurfaces
Ali Naqavi, Samuel P. Loke, Michael D. Kelzenberg +9
We report the design, fabrication and characterization of ultralight highly emissive metaphotonic structures with record-low mass/area that emit thermal radiation efficiently over…
High-contrast self-imaging with ordered optical elements
Ali Naqavi, Hans Peter Herzig, Markus Rossi
Creating arbitrary light patterns finds applications in various domains including lithography, beam shaping, metrology, sensing and imaging. We study the formation of high-contrast…
Limit of light coupling strength in solar cells
A. Naqavi, F. -J. Haug, C. Ballif +2
We introduce a limit for the strength of coupling light into the modes of solar cells. This limit depends on both a cell's thickness and its modal properties. For a cell with refra…
Angular behavior of the absorption limit in thin film silicon solar cells
Ali Naqavi, Franz-Josef Haug, Karin Söderström +5
We investigate the angular behavior of the upper bound of absorption provided by the guided modes in thin film solar cells. We show that the 4n^2 limit can be potentially exceeded…
Light trapping in solar cells at the extreme coupling limit
Ali Naqavi, Franz-Josef Haug, Corsin Battaglia +2
We calculate the maximal absorption enhancement obtainable by guided mode excitation in a weakly absorbing dielectric slab over wide wavelength ranges. The slab mimics thin film si…