Subwavelength antimonide infrared detector coupled with dielectric resonator antenna

Kazemi, Alireza; Shu, Qingyuan; Dahiya, Vinita; Taghipour, Zahra; Paradis, Pablo; Ball, Catherine; Ronningen, T. J.; Zollner, Stefan; Young, Steven G.; Budhu, Jordan; Grossklaus, Kevin A.; Vandervelde, Thomas E.; Grbic, Anthony; Krishna, S.

doi:10.1117/12.2518807

Cited by 6 publications

References 11 publications

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Light-harvesting microconical arrays for enhancing infrared imaging devices: Proposal and demonstration

Jin

Brettin

Bidney

et al. 2021

Applied Physics Letters

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Light-harvesting low-index (n = 1.6) microconical arrays are proposed for increasing the sensitivity and the signal-to-noise ratio (SNR) of mid-wave infrared (MWIR) focal plane arrays used in thermal cameras. The light is collected by the microcone's top base with diameter (Dt) and delivered to its bottom base with the wavelength-scale diameter (Db), which is coupled to the photodetector mesa. The power enhancement factor (PEF) is defined as a ratio of the powers delivered to the photodetector with and without the microcone. By using numerical modeling, it is shown that in the 3D case the geometrical limit of PEF3-D = (Dt/Db)2 cannot be reached due to optical losses, but the values of PEF3D ∼ 100 can be achieved in the MWIR range for slightly tapered (≤ 10°) microcones with narrow bottom bases (Db ≤ 4 μm) and significant height (h ≥ 120 μm). To demonstrate the light concentrating capability, the microconical arrays with Dt/Db = 60 μm/8 μm and h = 150 μm were directly fabricated in photoresist by using a nanoscribe tool on top of the front-illuminated Ni/Si Schottky-barrier short-wave infrared photodetectors with 22 μm mesas, and threefold enhancement in the photocurrent response was observed. Due to expected reduction of the thermal noise for compact photodetector mesas, the proposed approach permits an increase in the SNR and the operation temperature of the MWIR imaging devices.

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Light-harvesting microconical arrays for enhancing infrared imaging devices: Proposal and demonstration

Jin

Brettin

Bidney

et al. 2021

Applied Physics Letters

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Enhanced tunneling distance of near field radiative energy with high-index dielectric resonators

Wen

Jakkinapalli

2021

Applied Physics Letters

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By placing high-index dielectric resonators on surfaces supporting surface plasmons in the near field, strong magnetic resonance can be observed in the high-index dielectric resonators with appropriate heights around the surface plasmon resonance frequencies. The strong magnetic resonance allows strong thermal photon tunneling across a 1 μm gap, which is one order longer than the previous demonstrations of near field radiation with surface plasmons. The thermal photon tunneling happens when the horizontal wavenumber is kx∼4πw with w is the width of the high-index resonators. The height of the high-index dielectric resonators should provide enough retardation of the electric field between the top and bottom of the resonator to form a displacement current loop. Therefore, similar magnetic field resonance occurs in the resonator when we triple rather than double the height of the high-index dielectric resonators. The usage of dielectric resonators to amplify the thermal electric field in the near field domain can be a potential method to increase the quasi-monochromatic radiation distance of an emission domain by one order or more at the frequencies of the surface waves.

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Comparative analysis on reflection coefficient (dB) and standing wave ratio (SWR) (dB) of Alumina medium dielectric resonator antenna with silicon medium dielectric resonator antenna for satellite systems at 4-5 GHz frequency

Naveen,

Balachander

2023

AIP Conference Proceedings

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Subwavelength antimonide infrared detector coupled with dielectric resonator antenna

Cited by 6 publications

References 11 publications

Light-harvesting microconical arrays for enhancing infrared imaging devices: Proposal and demonstration

Light-harvesting microconical arrays for enhancing infrared imaging devices: Proposal and demonstration

Enhanced tunneling distance of near field radiative energy with high-index dielectric resonators

Comparative analysis on reflection coefficient (dB) and standing wave ratio (SWR) (dB) of Alumina medium dielectric resonator antenna with silicon medium dielectric resonator antenna for satellite systems at 4-5 GHz frequency

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