Projection lithography patterned high-resolution quantum dots/thiol-ene photo-polymer pixels for color down conversion.

Pixelated color converters are envisioned to achieve full-color high-resolution display through down conversion of blue/ultraviolet(UV) micro-LEDs. Quantum dots (QDs) are promising narrow-band converters of high quantum efficiency and brightness enabling saturated colors with wide color gamut in displays. Here we demonstrate high-resolution pixelated red and green QDs/thiol-ene photo-polymer converters (single pixel down to 6 µm; converters array of 21 µm pixel, 30 µm pitch and sub 10 µm thickness) patterned through projection lithography.

Ultrathin platelet antennas mediated light-matter interaction in monolayer MoS.

Monolayer MoS is an emerging two-dimensional semiconductor that has seen wide applications in optoelectronic and light-emitting devices. Here we report on the antenna-enhanced spontaneous emission of monolayer MoS, which has weak absorbance and low intrinsic quantum yield. The ultrathin silver platelet antennas we use can both increase the absorption cross-section and improve the transmission efficiency via controlling the optical field at nanometer scale.

High-precision broadband measurement of refractive index by picosecond real-time interferometry.

The refractive index is one of the most important quantities that characterize a material's optical properties. However, it is hard to measure this value over a wide range of wavelengths. Here, we demonstrate a new technique to achieve a spectrally broad refractive index measurement.