LASER-COOLED PLATFORM FOR OPTOELECTRONIC COOLING PLANE APPLICATIONS
Abstract
ABSTRACT:Waste heat generation is a generic problem in electronic and laser systems. Reduction of thermal loading is especially important in cryogenic applications, due to the high cost of evacuating the waste heat using traditional approaches. In radiation-balanced lasers, anti-Stokes spontaneous emission within the laser medium is employed to balance the heat generated by the Stokesshiftedstimulated emission. Same process is also used in laser cooling where external laser light is used for optical pumping of the refrigerated sample.The University of New Mexico proposes a new scheme of an optical-waveguide-based cooling device, where cooling effect is achieved through efficient anti-Stokes spontaneous emission from nanoemitters embedded into the core of a waveguide structure acting as a heat sink and excited by external laser emission. The physical mechanism is that of laser cooling and requires nanoemitters with very efficient anti-Stokes emission when excited at the external laser emission wavelength, as well as efficient evacuation of the anti-Stokes light from the cooled region.The proposed research effort involves synthesis of various nanoemitters and their extensive characterization by absorption, photoluminescence (PL), and photoluminescence excitation (PLE) measurements from 350 K to cryogenic temperatures (down to 4 K), with the main goal to obtain high-quality nanoemitters that demonstrate efficient anti-Stokes PL (ASPL) with as largeanti-Stokes shift as possible in response to appropriate external laser excitation.Various designs of the cooling device will be investigated, with the goal of finding the most efficient way for spontaneous emission extraction from the waveguide structure in order to prevent reabsorption of the spontaneous emission and reheating of the device. Both dielectric wave guide- based and 2D photonic crystal cooling devices will be explored. In all the designs, the cooling action will be achieved by extracting a substantial part of the anti-Stokes spontaneousemission of the embedded nanoemitters from the optical-waveguide-based cooling device. As an active optoelectronic component to be optically cooled, a 1.55-~m InP-based Fabry- Perot diode laser will be integrated with the cooling device. Complete optical and electrical characterization of the optically cooled laser will be carried out over a wide temperature range, from 350 K down to 4 K, and the optical cooling effect will be evaluated.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 25, 2019
- Source ID
- N000141912117
Entities
People
- Marek Osinski
Organizations
- Office of Naval Research
- United States Navy
- University of New Mexico