Experiment for cryogenic large-aperture intensity mapping: instrument design
ER Switzer, EM Barrentine, G Cataldo… - Journal of …, 2021 - spiedigitallibrary.org
The experiment for cryogenic large-aperture intensity mapping (EXCLAIM) is a balloon-
borne telescope designed to survey star formation in windows from the present to z= 3.5 …
borne telescope designed to survey star formation in windows from the present to z= 3.5 …
Large diameter millimeter-wave low-pass filter made of alumina with laser ablated anti-reflection coating
We fabricated a 302 mm diameter low-pass filter made of alumina that has an anti-reflection
coating (ARC) made with laser-ablated sub-wavelength structures (SWS). The filter has …
coating (ARC) made with laser-ablated sub-wavelength structures (SWS). The filter has …
Development status of the polarization modulator using 330 mm diameter sapphire-based achromatic half-wave plate for LiteBIRD
R Takaku, K Aizawa, R Akizawa… - … , and Far-Infrared …, 2024 - spiedigitallibrary.org
We report on the breadboard model of a polarization modulator unit (PMU) using a sapphire-
based achromatic half-wave plate (HWP) for the low-frequency telescope (LFT) of LiteBIRD …
based achromatic half-wave plate (HWP) for the low-frequency telescope (LFT) of LiteBIRD …
Performance of a 200 mm Diameter Achromatic HWP with Laser-Ablated Sub-Wavelength Structures
We laser-ablated sub-wavelength structures (SWS) on 200 mm diameter birefringent
sapphire disks to produce broadband anti-reflection coating (ARC). The disks were …
sapphire disks to produce broadband anti-reflection coating (ARC). The disks were …
Influence of surface damage on the optical properties of sapphire and its etching repair method
Z Su, Z Liang, Y Ma, Y Du, L Guo, B Zhao, T Zhou… - Ceramics …, 2024 - Elsevier
Sapphire optical components are prone to cracks and scratches during grinding, installation,
and service, which affects the laser damage resistance. In order to improve the laser …
and service, which affects the laser damage resistance. In order to improve the laser …
Simulated Performance of Laser-Machined Metamaterial Anti-reflection Coatings
N Farias, S Beckman, AT Lee, A Suzuki - Journal of low temperature …, 2022 - Springer
Lenslet-coupled antenna arrays have been used in CMB experiments and are the baseline
technology for the next-generation satellite missions such as LiteBIRD and PICO. Lenslets …
technology for the next-generation satellite missions such as LiteBIRD and PICO. Lenslets …
Observation of damage generation induced by electron excitation and stress wave propagation during ultrashort pulse laser drilling of sapphire
Ultrashort pulse laser processing is garnering significant attention as a method for
processing sapphire. However, its preciseness is an issue owing to severe damage …
processing sapphire. However, its preciseness is an issue owing to severe damage …
Impact of the effective thickness from anti-reflective sub-wavelength structures in achromatic half-wave plate design
We develop a continuously rotating achromatic half-wave plate (HWP) for LiteBIRD. An
achromatic HWP is made of five-layer sapphire plates following a Pancharatnam design …
achromatic HWP is made of five-layer sapphire plates following a Pancharatnam design …
Anti-reflection coating of laser-ablated sub-wavelength structure for millimeter-wave alumina filters
K Aizawa, R Akizawa, S Cray, S Hanany… - … , and Far-Infrared …, 2024 - spiedigitallibrary.org
We present designs and fabrications of sub-wavelength anti-reflection structures on alumina
for infrared filters at three observational frequency bands near 30, 125, and 250 GHz, which …
for infrared filters at three observational frequency bands near 30, 125, and 250 GHz, which …
3D printed alumina as a millimeter-wave optical element
R Lam, S Cray, C Firth, S Hanany… - … , and Far-Infrared …, 2024 - spiedigitallibrary.org
We present transmission and loss measurements of 3D printed alumina and reflectance
measurement of a sample with 3D printed sub-wavelength structures anti-reflection coatings …
measurement of a sample with 3D printed sub-wavelength structures anti-reflection coatings …