Columbia University

Meng Tian

Nanfang Yu

Norman Nan Shi

Adam Overvig

Jyotirmoy Mandal

Devices for radiative cooling and optical waveguiding are provided, wherein the devices comprise a fabric including one or more fibers extending for a length in a longitudinal direction and a plurality of void structures positioned within each of the one or more fibers and extended over the length of each of the one or more fibers. Each of the plurality of void structures is configured to scatter at least a portion of an electromagnetic radiation received thereon to thereby radiatively cool the object.

Devices and methods for radiative cooling

Systems and methods for radiative cooling and heating are provided. For example, systems for radiative cooling can include a top layer including one or more polymers, where the top layer has high emissivity in at least a portion of the thermal spectrum and an electromagnetic extinction coefficient of approximately zero, absorptivity of approximately zero, and high transmittance in at least a portion of the solar spectrum, and further include a reflective layer including one or more metals, where the reflective layer has high reflectivity in at least a portion of the solar spectrum.

Systems and methods for radiative cooling and heating

Systems and methods for detecting a change in at least one physical parameter of a target illuminated by electromagnetic radiation are disclosed herein. The system includes one or more optical fibers, an optical switch, and a photo detector. The optical fiber switch can transmit at least a portion of the electromagnetic radiation into the one or more optical fibers. The optical fibers can have a plurality of sensor nodes. The sensor nodes can induce an interaction between the change in the at least one physical parameter and the transmitted electromagnetic radiation to generate an optical signal. The photo detector can be connected to the one or more optical fibers and measure the optical signal.

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Fort Lee, NJ, United States of America

Meng Tian