Near-field energy extraction with hyperbolic metamaterials.

Although blackbody radiation described by Planck's law is commonly regarded as the maximum of thermal radiation, thermal energy transfer in the near-field can exceed the blackbody limit due to the contribution from evanescent waves. Here, we demonstrate experimentally a broadband thermal energy extraction device based on hyperbolic metamaterials that can significantly enhance near-field thermal energy transfer. The thermal extractor made from hyperbolic metamaterials does not absorb or emit any radiation but serves as a transparent pipe guiding the radiative energy from the emitter. At the same gap between an emitter and an absorber, we observe that near-field thermal energy transfer with thermal extraction can be enhanced by around 1 order of magnitude, compared to the case without thermal extraction. The novel thermal extraction scheme has important practical implications in a variety of technologies, e.g., thermophotovoltaic energy conversion, radiative cooling, thermal infrared imaging, and heat assisted magnetic recording.

[1]  Gang Chen,et al.  Surface phonon polaritons mediated energy transfer between nanoscale gaps. , 2009, Nano letters.

[2]  A. Majumdar,et al.  Nanowires for enhanced boiling heat transfer. , 2009, Nano letters.

[3]  Jean-Jacques Greffet,et al.  Radiative heat transfer at the nanoscale , 2009 .

[4]  J. Greffet,et al.  Mesoscopic description of radiative heat transfer at the nanoscale. , 2010, Physical review letters.

[5]  Zhaowei Liu,et al.  Design, fabrication and characterization of indefinite metamaterials of nanowires , 2011, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences.

[6]  K. Joulain,et al.  Definition and measurement of the local density of electromagnetic states close to an interface , 2004, InternationalQuantum Electronics Conference, 2004. (IQEC)..

[7]  James K. Gimzewski,et al.  A femtojoule calorimeter using micromechanical sensors , 1994 .

[8]  Shanhui Fan,et al.  Thermal rectification through vacuum. , 2010, Physical review letters.

[9]  Philippe Ben-Abdallah,et al.  Near-field thermal transistor. , 2013, Physical review letters.

[10]  J B Pendry,et al.  Guiding, focusing, and sensing on the subwavelength scale using metallic wire arrays. , 2007, Physical review letters.

[11]  Zongfu Yu,et al.  Enhancing far-field thermal emission with thermal extraction , 2013, Nature Communications.

[12]  E. Jordan,et al.  Thermal Barrier Coatings for Gas-Turbine Engine Applications , 2002, Science.

[13]  Duane C. Karns,et al.  Heat-assisted magnetic recording by a near-field transducer with efficient optical energy transfer , 2009 .

[14]  Jean-Jacques Greffet,et al.  Thermal radiation scanning tunnelling microscopy , 2006, Nature.

[15]  Kornelius Nielsch,et al.  Uniform Nickel Deposition into Ordered Alumina Pores by Pulsed Electrodeposition , 2000 .

[16]  Federico Capasso,et al.  Harvesting renewable energy from Earth’s mid-infrared emissions , 2014, Proceedings of the National Academy of Sciences.

[17]  S. Shen,et al.  Broadband near-field radiative thermal emitter/absorber based on hyperbolic metamaterials: Direct numerical simulation by the Wiener chaos expansion method , 2013 .

[18]  Michal Lipson,et al.  Near-field radiative cooling of nanostructures. , 2012, Nano letters.

[19]  A. Narayanaswamy,et al.  Heat Transfer From Freely Suspended Bimaterial Microcantilevers , 2011 .

[20]  Arun Vijayakumar,et al.  Chemical mechanical polishing of nickel for applications in MEMS devices , 2004 .

[21]  Sheng Shen,et al.  Tuning near field radiation by doped silicon , 2013 .

[22]  Riccardo Messina,et al.  Graphene-based photovoltaic cells for near-field thermal energy conversion , 2012, Scientific Reports.