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Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
Published on: September 27, 2011
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High-index-contrast photonic structures: a versatile platform for photon manipulation.
Young-Bin Kim1, Jin-Woo Cho1, Yun-Jo Lee1
1Department of Applied Physics, Kyung Hee University, Yongin, Gyeonggi-do, 17104, Republic of Korea.
Light, Science & Applications
|November 1, 2022
Summary
Researchers fabricated versatile hollow optical cavities (0.2-5 µm) with dielectric/metal shells. These low-index structures offer unique optical properties for applications across UV to mid-infrared spectra, enhancing optoelectronics and enabling high-temperature devices.
Area of Science:
- Optics and Photonics
- Materials Science
- Nanotechnology
Background:
- Light propagation is governed by material refractive index and its spatial distribution.
- Low-index materials, such as hollow cavities, exhibit unique optical properties.
- Hollow cavities are utilized in diffraction gratings, optical antennas, and resonators.
Purpose of the Study:
- To fabricate and characterize hollow optical cavities of varying sizes (0.2-5 µm).
- To explore the optical characteristics and applications of these low-index structures.
- To demonstrate their potential in addressing limitations of current optoelectronic devices.
Main Methods:
- Fabrication of hollow cavities supported by conformal dielectric/metal shells.
- Characterization of cavity properties for different spectral regions.
Main Results:
- Successful fabrication of hollow cavities with diameters ranging from 0.2 to 5 µm.
- Demonstrated applications in ultraviolet (photodetectors), visible (LEDs, solar cells, metalenses), near-infrared (thermophotovoltaics), and mid-infrared (radiative coolers) regions.
- Hollow cavity structures exhibit high elasticity and minimize thermal stress.
Conclusions:
- Tailored hollow cavities serve as versatile optical platforms for diverse optoelectronic applications.
- These structures can overcome limitations of existing optoelectronic devices.
- Future applications include high-temperature devices like thermophotovoltaics and concentrator photovoltaics.
