Study on characterization method of optical constants of germanium thin films from absorption to transparent region

Liu, Huasong; Li, Shida; Sun, Pengshuai; Yang, Xin; Liu, Dandan; Ji, Yiqin; Zhang, Feng; Chen, Deying; Cui, Yuping

doi:10.1016/j.mssp.2018.04.019

Cited by 20 publications

(7 citation statements)

References 10 publications

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“…5 shows the optical reflection spectra of the c-Ge substrate, the Ag : PGe sample formed by ion implantation, and its surface after FTA by light pulses with different τ . The spectrum of unimplanted c-Ge consists of several bands with maxima near 276, 564 and 820 nm, corresponding to intraband and interband electronic transitions [7]. The intensity of the 276 nm band characterizes the degree of crystallinity of the semiconductor material [8].…”

Section: Resultsmentioning

confidence: 99%

Change in the surface state of the single-crystal germanium as a result of implantation with silver ions and annealing with light pulses

et al. 2022

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Single-crystal c-Ge plates implanted with Ag+ ions with an energy of E=30 keV, current density of the ion beam J = 5 μA/cm2 and a dose of D = 2.5· 1016 ion/cm2 were subjected to rapid thermal annealing by single light pulses of various durations from 1 up to 9.5 s. By scanning electron microscopy and optical reflection spectroscopy measurements it was shown that after ion implantation an amorphous porous Ag : PGe layer of spongy structure, consisting of Ge nanowires, is formed on the surface of c-Ge substrates. It was found that the annealing with an increase in the pulse duration up to 5 s successively leads to an increase in the Ge nanowire diameters from 26 to 35 nm. With longer pulses, the porous Ag : PGe structure is destroyed and Ag evaporates from the implanted layers. Keywords: nanoporous germanium, ion implantation, rapid thermal annealing.

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Section: Resultsmentioning

confidence: 99%

Change in the surface state of the single-crystal germanium as a result of implantation with silver ions and annealing with light pulses

et al. 2022

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“…Ge serves as a stable substrate and grounding end in the visible wavelength range. Its specific wave absorption properties aid the metasurface unit in shielding against external electromagnetic fields and preventing external electromagnetic interference [12]. Additionally, its excellent thermal conductivity facilitates efficient dissipation of the heat generated during the power-up process, thereby enhancing the stability and reliability of the electrically tunable metasurface system.…”

Section: Structure Designmentioning

confidence: 99%

An electrically tunable metasurface for continuous phase modulation at visible wavelength based on indium tin oxide

Wang,

Li,

Chen

2023

Optical Design and Testing XIII

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“…Ge high hardness makes it a suitable material for hard coatings, and while it has a high refractive index, it is used as a transparent material in the mid-infrared region. [155] However, its optical properties are sensitive to temperature, particularly the refractive index. BP is an excellent candidate for antireflective surfaces, but it is not suitable for high-transmission optical surfaces as it is opaque in the visible range.…”

Section: Other Materialsmentioning

confidence: 99%

A Review on Potential Mechanically Resistant Materials for Optical Multifunctional Surfaces: Bioinspired Surfaces with Advanced Properties

Sarieddine,

Kadiri,

Guelorget

et al. 2023

Adv Materials Inter

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Mimicking naturethrough nanostructuring allows the creation of multifunctional surfaces withremarkable properties, such as anti‐reflectivity, high optical transmittanceand controlled wettability, enabling anti‐icing or anti‐fogging behaviors. These multifunctionalsurfaces have gained significant interest in civil and military domains. However,integrating them into real‐life applications faces challenges related tocost, high‐throughput large‐scale compatible nanofabrication techniques, andtheir mechanical resistance. While sub‐wavelength patterning improves the optical performance,it often comes at the cost of compromising the mechanical resistance. As opticalperformance improves, mechanical resistance tends to deteriorate, and viceversa. To address this challenge, taking inspiration from the lotus leafstructure, where patterns are covered by a thin 2D wax film, covering thepatterns of structured surfaces with a protective layer can be a viablesolution. This protective layer should enhance the mechanical resistance of thesurface without compromising its multifunctional capabilities. This reviewhighlights the most suitable materials that can be employed as protectivecoatings and their potential to enhance the resistance of structured surfaces.The fundamental concept behind the creation of multifunctional optical surfacesis discussed, followed by a comprehensive examination of mechanical tests thatcan be utilized to characterize their mechanical behavior. This review aims topave the way for the development of durable multifunctional optical surfaces,making them more amenable to industrial applications.

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Study on characterization method of optical constants of germanium thin films from absorption to transparent region

Cited by 20 publications

References 10 publications

Change in the surface state of the single-crystal germanium as a result of implantation with silver ions and annealing with light pulses

Change in the surface state of the single-crystal germanium as a result of implantation with silver ions and annealing with light pulses

An electrically tunable metasurface for continuous phase modulation at visible wavelength based on indium tin oxide

A Review on Potential Mechanically Resistant Materials for Optical Multifunctional Surfaces: Bioinspired Surfaces with Advanced Properties

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