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Although the field of gas phase rotational spectroscopy is mature and millions of rotational spectral lines have been measured in hundreds of molecules with sub-MHz accuracy, it remains a challenge to measure these rotational spectra in excited...

Ph.D. candidate Joon-Suh Park has been selected as a top DARPA Riser and has presented his work on mass-producible, 10-centimeter diameter metalenses in the visible at the recent DARPA Forward conference. The 10 cm metalens is the largest ever fabricated...

Current achromatic metalenses are typically small and bounded to tens to hundreds of micrometers in diameter – the size of a few pollen grains in a row. In this study, we demonstrate a high throughput inverse design framework that is able to design large...

Electro-optic modulators change the intensity of light in response to electric signals and have attracted much attention recently as they enable active photonics. Reaching gigahertz speeds is an important milestone that makes applications in remote...

In recent work, we have shown that a suitably-designed polarization-sensitive metasurface grating when paired with a conventional imaging system can serve as an "attachment" rendering it capable of polarization imaging. We describe the design rules that...

Terahertz radiation lies in the transition region between the microwave and infrared spectra. It has much potential in civil and defence applications, including communications, imaging, and spectroscopy. Yet, the major obstacle to the widespread use of...

The peculiar physics of quantum cascade lasers has led to the discovery of new frequency comb phenomena beyond traditional ones such as harmonic states, characterized by mode skipping, time-dependent spatial hole burning, turbulent states, recently...

Optical vortices —light structures which look like donuts and can rotate around their axis of propagation— have attracted wide interest as new means for free space communications, optical trapping, and structured illumination in microscopes. Current...

Transparent bulk optical components have an unfortunate tendency to stretch out ultrashort laser pulses upon transmission. This effect – also known as group delay dispersion – destroys the carefully designed time-structure of the affected pulses. In this...

Spatial light modulators (SLM) provide tailored light fields for many applications. Here, we show that an SLM device can be realized from a structure as simple as a single organic electro-optic material deposited on top of interlaced gold electrodes. When...