Concentric circular ring and nanodisk optical antenna enhanced multispectral quantum dot infrared photodetector with spectral localization

Zhang, Yingjie; Kemsri, Thitikorn; Liu, Lin; Gu, Guiru; Lu, Xuejun

doi:10.1088/1361-6463/aa8522

Cited by 4 publications

(4 citation statements)

References 31 publications

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“…The novel ballistic rectification regime in graphene has also been employed recently in the LWIR band with its great potential to substantially reduce the device response time [ 66 ]. Examples of these devices include, but are not limited to, MOM diodes in a wide range of configurations, microbolometers, thermocouples [ 23 , 24 ], geometric diodes [ 66 , 67 , 68 ], Schottky diodes [ 69 , 70 ], quantum dot photodetectors [ 71 , 72 , 73 ] and others. Some of these devices are illustrated in Figure 13 .…”

Section: Ir Sensing Elementmentioning

confidence: 99%

Nano-Antenna Coupled Infrared Detector Design

Mubarak

Sidek

Abdel‐Rahman

et al. 2018

Sensors

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Since the 1940s, infrared (IR) detection and imaging at wavelengths in the two atmospheric windows of 3 to 5 and 8 to 14 μm has been extensively researched. Through several generations, these detectors have undergone considerable developments and have found use in various applications in different fields including military, space science, medicine and engineering. For the most recently proposed generation, these detectors are required to achieve high-speed detection with spectral and polarization selectivity while operating at room temperature. Antenna coupled IR detectors appear to be the most promising candidate to achieve these requirements and has received substantial attention from research in recent years. This paper sets out to present a review of the antenna coupled IR detector family, to explore the main concepts behind the detectors as well as outline their critical and challenging design considerations. In this context, the design of both elements, the antenna and the sensor, will be presented individually followed by the challenging techniques in the impedance matching between both elements. Some hands-on fabrication techniques will then be explored. Finally, a discussion on the coupled IR detector is presented with the aim of providing some useful insights into promising future work.

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Section: Ir Sensing Elementmentioning

confidence: 99%

Nano-Antenna Coupled Infrared Detector Design

Mubarak

Sidek

Abdel‐Rahman

et al. 2018

Sensors

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“…Insight into Electronic structures of quantum heterostructures by the first principle investigations has paved way for the exploration of these systems in broad device applications [1][2][3][4]. In the past two decades, research on quantum rings has brought out notable developments.…”

Section: Introductionmentioning

confidence: 99%

Electrically induced direct to indirect exciton transition in CdTe/CdMnTe concentric double quantum ring rooted in SiO₂ matrix

Sherly,

Nithiananthi

2024

Phys. Scr.

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Effect of electric field and ring dimension on the localization of direct and indirect exciton formed inside a CdTe/CdMnTe Concentric Double Quantum Ring (CDQR) has been studied using variational technique. The whole double ring structure is embedded inside a SiO2 matrix to enhance exciton localization. Electric field applied along the axial (z) axis tilts the band structure which promotes the carrier localization more in the edges than in the center of the ring. Thus, the stronger electric field gives a triangular confinement to the carrier in the edges which enhances the carrier stability. Along with the effect of electric field the ring dimension which determines the stability of the exciton retains has been estimated through the mean square distance. The effect of the location of the constituent carriers on the excitonic stability and the efficient carrier transfer from inner ring to outer ring has been calculated for both symmetric and asymmetric ring dimensions. Height of the ring has been varied to understand its effect on the localization of both direct and indirect exciton.

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“…near-fields) [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Optical antennas can also change the near-field distributions [6,16,17] Journal of Physics D: Applied Physics Study of frequency-dependent plasmonic enhancement of a circular disk nano-optical antenna array using a femtosecond laser frequency comb and thus enhance near-surface light absorption. This enables efficient light absorption using a thin light absorption layer [12,[18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Study of frequency-dependent plasmonic enhancement of a circular disk nano-optical antenna array using a femtosecond laser frequency comb

Kemsri

Schnitzer

et al. 2019

J. Phys. D: Appl. Phys.

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In this paper, we report the study of the frequency-dependent plasmonic enhancement of a circular disk nano-optical antenna array and the photo-response of the optical antenna enhanced photodetector at different frequencies using a femtosecond (fs) laser frequency comb. A fs-laser frequency comb can provide hundreds of evenly spaced harmonic frequencies and thus allows simultaneous measurement of the plasmonic optical antenna enhancement effect at these harmonic frequencies. This offers a highly efficient frequency-dependent measurement approach compared to the conventional method of modulating of a c.w. laser, which measures the frequency response at each frequency. The impulse response of the circular disk nano-optical antenna array and the electric-field (E-field) distribution profile are simulated under a fs laser illumination. The light intensity spectrum is simulated and verified to have uniform intensities on the harmonic frequencies within the ±5 GHz frequency range. The photocurrent densities in different regions of a GaAs p-i-n photodetector are analyzed together with their frequency dependence at the harmonic frequencies of the fs laser frequency comb with a repetition rate of f 0 = 94.2 MHz. A circular disk nano-optical antenna array enhanced GaAs p-i-n photodetector was fabricated and measured using a fs laser frequency comb with the same repetition rate. The nano-optical antenna can provide ~20 dB enhancement for the harmonic frequencies and extend the detector cut-off frequency from 2.4 GHz to 4.2 GHz.

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Concentric circular ring and nanodisk optical antenna enhanced multispectral quantum dot infrared photodetector with spectral localization

Cited by 4 publications

References 31 publications

Nano-Antenna Coupled Infrared Detector Design

Nano-Antenna Coupled Infrared Detector Design

Electrically induced direct to indirect exciton transition in CdTe/CdMnTe concentric double quantum ring rooted in SiO₂ matrix

Study of frequency-dependent plasmonic enhancement of a circular disk nano-optical antenna array using a femtosecond laser frequency comb

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Concentric circular ring and nanodisk optical antenna enhanced multispectral quantum dot infrared photodetector with spectral localization

Cited by 4 publications

References 31 publications

Nano-Antenna Coupled Infrared Detector Design

Nano-Antenna Coupled Infrared Detector Design

Electrically induced direct to indirect exciton transition in CdTe/CdMnTe concentric double quantum ring rooted in SiO2 matrix

Study of frequency-dependent plasmonic enhancement of a circular disk nano-optical antenna array using a femtosecond laser frequency comb

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Electrically induced direct to indirect exciton transition in CdTe/CdMnTe concentric double quantum ring rooted in SiO₂ matrix