Unconventional Thermal Emission from Photonic Crystals

This paper focuses on manipulating thermal emission and radiation loss of heat energy in a heat waveguide. A One-Dimensional Photonic Crystal is used as a waveguide clad to prohibit the thermal emission from escaping. The model may reduce the radiation loss of heat energy in the waveguide core, and heat energy can be confined to propagate along the waveguide’s longitude axis. The waveguide clad comprises alternative layers of high and low refractive index materials containing sufficient electromagnetic stop bands to trap the thermal emission from escaping out of the waveguide. The numerical simulation of the model shows that the forbidden bandgap of photonic crystal structures with alternative layers of silica and silicon has width enough to make heat energy be confined within the waveguide core so that efficient heat energy transmission can be achieved along the longitude axis of the waveguide.

Download Full-text

Thermal emission of one-dimensional conjugated photonic crystals heterojunction embedded with graphene

The European Physical Journal B ◽

10.1140/epjb/e2019-90611-3 ◽

2019 ◽

Vol 92 (3) ◽

Author(s):

Yifan He ◽

Liang Guo ◽

Jincheng Li ◽

Yihang Chen ◽

Chengping Yin

Keyword(s):

Photonic Crystals ◽

Thermal Emission ◽

One Dimensional

Download Full-text

Thermal emission of midinfrared GaAs photonic crystals

Physical Review B ◽

10.1103/physrevb.78.165305 ◽

2008 ◽

Vol 78 (16) ◽

Cited By ~ 9

Author(s):

Estelle Homeyer ◽

Julien Houel ◽

Xavier Checoury ◽

Guy Fishman ◽

Sébastien Sauvage ◽

...

Keyword(s):

Photonic Crystals ◽

Thermal Emission

Download Full-text

Photonic Crystals: Shaping the Flow of Thermal Radiation

MRS Proceedings ◽

10.1557/proc-1162-j01-02 ◽

2009 ◽

Vol 1162 ◽

Cited By ~ 1

Author(s):

Ivan Čelanović ◽

Michael Ghebrebrhan ◽

Yi Xiang Yeng ◽

John Kassakian ◽

Marin Soljačić ◽

...

Keyword(s):

Photonic Crystals ◽

Thermal Emission ◽

Resonant Cavity ◽

Broad Band ◽

Selective Emitter ◽

Spatial Properties ◽

Resonant Modes ◽

Thermal Emitters ◽

Thermal Emitter ◽

Vertical Cavity

AbstractIn this paper we explore theory, design, and fabrication of photonic crystal (PhC) based selective thermal emitters. In particular, we focus on tailoring spectral and spatial properties by means of resonant enhancement in PhC's. Firstly, we explore narrow-band resonant thermal emission in photonic crystals exhibiting strong spectral and directional selectivity. We demonstrate two interesting designs based on resonant Q-matching: a vertical cavity enhanced resonant thermal emitter and 2D silicon PhC slab Fano-resonance based thermal emitter. Secondly, we examine the design of 2D tungsten PhC as a broad-band selective emitter. Indeed, based on the resonant cavity coupled resonant modes we demonstrate a highly selective, highly-spectrally efficient thermal emitter. We show that an emitter with a photonic cut-off anywhere from 1.8 μm to 2.5 μm can be designed.

Download Full-text

Theory of Thermal Emissivity and Enhanced Absorption in Sub-wavelength Metallo-Dielectric Photonic Crystals

MRS Proceedings ◽

10.1557/proc-1014-aa11-05 ◽

2007 ◽

Vol 1014 ◽

Author(s):

Rana Biswas ◽

Irina Puscasu ◽

Martin Pralle ◽

Martin McNeal ◽

Anton Greenwald ◽

...

Keyword(s):

Photonic Crystal ◽

Photonic Crystals ◽

Thermal Emission ◽

Metal Layer ◽

Hole Array ◽

Enhanced Transmission ◽

Enhanced Absorption ◽

Guided Mode ◽

Thermal Emissivity ◽

Sub Wavelength

AbstractMetallo-dielectric photonic crystals are sharp thermal emitters at infrared wavelengths, and are being employed in sensors. We describe the theory of thermal emission and enhanced absorption in these photonic crystals using a scattering matrix approach, where Maxwell's equations are solved in Fourier space. A sub-wavelength hole array in a metal layer is coupled to a two-dimensional photonic crystal of the same periodicity in these metallo-dielectric photonic crystals. The sub-wavelength hole array has an enhanced transmission mode that couples to a weakly guided mode of the photonic crystal having similar modal character. The transmissive mode of the hole array is absorbed by the photonic crystal to create a sharp absorption and reflective minimum. The enhanced absorption is investigated in different lattice symmetries.

Download Full-text