A Fabry-Perot spectrometer for near-infrared astronomical observations

1985 ◽  
Vol 97 ◽  
pp. 1020 ◽  
Author(s):  
M. Tanaka ◽  
T. Yamashita ◽  
S. Sato ◽  
H. Okuda
Keyword(s):  
Near Infrared ◽  
Astronomical Observations ◽  
Fabry Perot

scholarly journals Broadband Absorption in Patterned Metal/Weakly-Absorbing-Spacer/Metal with Graded Photonic Super-Crystal

Photonics ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 114
Author(s):  
Steve Kamau ◽  
Safaa Hassan ◽  
Khadijah Alnasser ◽  
Hualiang Zhang ◽  
Jingbiao Cui ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polariton ◽  
Near Infrared ◽  
Broadband Absorption ◽  
Au Film ◽  
Fabry Perot ◽  
Absorbing Material ◽  
Multiple Band ◽  
Band Absorption ◽  
Plasmon Polaritons

It is challenging to realize the complete broadband absorption of near-infrared in thin optical devices. In this paper, we studied high light absorption in two devices: a stack of Au-pattern/insulator/Au-film and a stack of Au-pattern/weakly-absorbing-material/Au-film where the Au-pattern was structured in graded photonic super-crystal. We observed multiple-band absorption, including one near 1500 nm, in a stack of Au-pattern/spacer/Au-film. The multiple-band absorption is due to the gap surface plasmon polariton when the spacer thickness is less than 30 nm. Broadband absorption appears in the near-infrared when the insulator spacer is replaced by a weakly absorbing material. E-field intensity was simulated and confirmed the formation of gap surface plasmon polaritons and their coupling with Fabry–Pérot resonance.

Universal design rules for 2π phase trapezoidal metasurface based on Fabry–Perot resonance in visible and near-infrared

2021 ◽  
Vol 60 (11) ◽  
Author(s):  
Yu Wang ◽  
Yumin Liu ◽  
Tiesheng Wu ◽  
Jing Li ◽  
Yuhang Sun ◽  
...  
Keyword(s):  
Universal Design ◽  
Near Infrared ◽  
Design Rules ◽  
Fabry Perot

Carbonization in Titan Tholins: implication for low albedo on surfaces of Centaurs and trans-Neptunian objects

2015 ◽  
Vol 15 (3) ◽  
pp. 231-238 ◽  
Author(s):  
Chaitanya Giri ◽  
Christopher P. McKay ◽  
Fred Goesmann ◽  
Nadine Schäfer ◽  
Xiang Li ◽  
...  
Keyword(s):  
Aromatic Hydrocarbons ◽  
Organic Material ◽  
Near Infrared ◽  
Proof Of Concept ◽  
Astronomical Observations ◽  
Polycyclic Aromatic ◽  
Large Polycyclic Aromatic Hydrocarbons ◽  
Characteristic Features ◽  
Complex Organic ◽  
Geometric Albedo

AbstractAstronomical observations of Centaurs and trans-Neptunian objects (TNOs) yield two characteristic features – near-infrared (NIR) reflectance and low geometric albedo. The first feature apparently originates due to complex organic material on their surfaces, but the origin of the material contributing to low albedo is not well understood. Titan tholins synthesized to simulate aerosols in the atmosphere of Saturn's moon Titan have also been used for simulating the NIR reflectances of several Centaurs and TNOs. Here, we report novel detections of large polycyclic aromatic hydrocarbons, nanoscopic soot aggregates and cauliflower-like graphite within Titan tholins. We put forth a proof of concept stating the surfaces of Centaurs and TNOs may perhaps comprise of highly ‘carbonized’ complex organic material, analogous to the tholins we investigated. Such material would apparently be capable of contributing to the NIR reflectances and to the low geometric albedos simultaneously.

scholarly journals Theoretical Investigation of Near-Infrared Fabry–Pérot Microcavity Graphene/Silicon Schottky Photodetectors Based on Double Silicon on Insulator Substrates

Micromachines ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 708
Author(s):  
Maurizio Casalino
Keyword(s):  
Near Infrared ◽  
Incident Light ◽  
Resonant Cavity ◽  
Bragg Reflector ◽  
Silicon On Insulator ◽  
Noise Equivalent Power ◽  
Distributed Bragg Reflector ◽  
Absorption Mechanism ◽  
Output Mirror ◽  
Fabry Perot

In this work a new concept of silicon resonant cavity enhanced photodetector working at 1550 nm has been theoretically investigated. The absorption mechanism is based on the internal photoemission effect through a graphene/silicon Schottky junction incorporated into a silicon-based Fabry–Pérot optical microcavity whose input mirror is constituted by a double silicon-on-insulator substrate. As output mirror we have investigated two options: a distributed Bragg reflector constituted by some periods of silicon nitride/hydrogenated amorphous silicon and a metallic gold reflector. In addition, we have investigated and compared two configurations: one where the current is collected in the transverse direction with respect to the direction of the incident light, the other where it is collected in the longitudinal direction. We show that while the former configuration is characterized by a better responsivity, spectral selectivity and noise equivalent power, the latter configuration is superior in terms of bandwidth and responsivity × bandwidth product. Our results show responsivity of 0.24 A/W, bandwidth in GHz regime, noise equivalent power of 0.6 nW/cm√Hz and full with at half maximum of 8.5 nm. The whole structure has been designed to be compatible with silicon technology.

Near-infrared observations of the dust coma of Comet Kohoutek (1973f) with a tilting-filter Fabry-Perot photometer

Icarus ◽  
1974 ◽  
Vol 23 (4) ◽  
pp. 568-576 ◽  
Author(s):  
C. Barbieri ◽  
C.B. Cosmovici ◽  
K.W. Michel ◽  
T. Nishimura ◽  
A.E. Roche
Keyword(s):  
Near Infrared ◽  
Infrared Observations ◽  
Fabry Perot ◽  
Dust Coma

scholarly journals Tridimensional Spectroscopic Techniques: Conference Summary

1995 ◽  
Vol 149 ◽  
pp. 369-381 ◽  
Author(s):  
J. Bland-Hawthorn
Keyword(s):  
Fourier Transform ◽  
Near Infrared ◽  
Three Dimensional ◽  
Spectroscopic Techniques ◽  
Conference Summary ◽  
Wide Range ◽  
Fabry Perot ◽  
Scientific Results ◽  
General Thrust

Over the last four days, we have enjoyed a wide range of talks on developments in three dimensional spectroscopic techniques. The conference organizing committee are to be congratulated for the artful manner in which instrumental presentations were interleaved with talks on the scientific results from these instruments. The general thrust of most talks was to advance the versatility of traditional instruments either through the Jacquinot (throughput) advantage or through the multiplex advantage, or both. A number of groups have attempted to utilize the full aperture of scanning Fabry-Perot and Fourier Transform interferometers. Arguably, Fabry-Perot interferometers have a wider application at present, although imaging Fourier Transform devices appear to have finally arrived, at least in the near infrared.

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