Photonic crystal spectrometer.
We demonstrate a new kind of optical spectrometer employing photonic crystal patterns to outcouple waveguided light from a transparent substrate. This spectrometer consists of an array of photonic crystal patterns, nanofabricated in a polymer on a glass substrate, combined with a camera. The camera captures an image of the light outcoupled from the patterned substrate; the array of patterns produces a spatially resolved map of intensities for different wavelength bands. The intensity map of the image is converted into a spectrum using the photonic crystal pattern response functions. We present a proof of concept by characterizing a white LED with our photonic crystal spectrometer.
Pervez
Nadia K
NK
Columbia Laboratory for Unconventional Electronics, Department of Electrical Engineering, Columbia University, New York, 10027, USA. nadia.pervez@gmail.com
Cheng
Warren
W
Jia
Zhang
Z
Cox
Marshall P
MP
Edrees
Hassan M
HM
Kymissis
Ioannis
I