Arrays of (50 μm) 2 Si microcavity plasma devices, as large as 40 000 pixels (200 × 200) with a packing density of 10 4 pixels cm -2, have been operated continuously in 500-900 Torr of Ne with ac excitation (5-20 kHz). More than two orders of magnitude larger than previously reported microplasma device arrays, 200 × 200 pixel structures produce uniform glow discharges in each pixel, have a power consumption of ∼0.85 W cm -2 for p Ne=700 Torr and an excitation frequency of 5 kHz, and exhibit maximum radiative efficiency for a Ne pressure of p Ne= 700 Torr and an excitation frequency of 10-15 kHz. All arrays examined (10×10→200×200) are characterized by pixel-to-pixel emission intensities constant over the entire array to within ±10%, and no barriers to the successful operation of much larger arrays are apparent.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)