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Wehmeier L, Liu M, Park S, Jang H, Basov DN, Homes CC, Carr GL. Ultrabroadband Terahertz Near-Field Nanospectroscopy with a HgCdTe Detector. ACS PHOTONICS 2023; 10:4329-4339. [PMID: 38145170 PMCID: PMC10739990 DOI: 10.1021/acsphotonics.3c01148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 10/27/2023] [Accepted: 11/01/2023] [Indexed: 12/26/2023]
Abstract
While near-field infrared nanospectroscopy provides a powerful tool for nanoscale material characterization, broadband nanospectroscopy of elementary material excitations in the single-digit terahertz (THz) range remains relatively unexplored. Here, we study liquid-Helium-cooled photoconductive Hg1-XCdXTe (MCT) for use as a fast detector in near-field nanospectroscopy. Compared to the common T = 77 K operation, liquid-Helium cooling reduces the MCT detection threshold to ∼22 meV, improves the noise performance, and yields a response bandwidth exceeding 10 MHz. These improved detector properties have a profound impact on the near-field technique, enabling unprecedented broadband nanospectroscopy across a range of 5 to >50 THz (175 to >1750 cm-1, or <6 to 57 μm), i.e., covering what is commonly known as the "THz gap". Our approach has been implemented as a user program at the National Synchrotron Light Source II, Upton, USA, where we showcase ultrabroadband synchrotron nanospectroscopy of phonons in ZnSe (∼7.8 THz) and BaF2 (∼6.7 THz), as well as hyperbolic phonon polaritons in GeS (6-8 THz).
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Affiliation(s)
- Lukas Wehmeier
- National
Synchrotron Light Source II, Brookhaven
National Laboratory; Upton, New York 11973, United States
- Department
of Physics and Astronomy, Stony Brook University; Stony Brook, New York 11794, United States
| | - Mengkun Liu
- National
Synchrotron Light Source II, Brookhaven
National Laboratory; Upton, New York 11973, United States
- Department
of Physics and Astronomy, Stony Brook University; Stony Brook, New York 11794, United States
| | - Suji Park
- Center
for Functional Nanomaterials, Brookhaven
National Laboratory, Upton, New York 11973, United States
| | - Houk Jang
- Center
for Functional Nanomaterials, Brookhaven
National Laboratory, Upton, New York 11973, United States
| | - D. N. Basov
- Department
of Physics, Columbia University; New York, New York 10027, United States
| | - Christopher C. Homes
- National
Synchrotron Light Source II, Brookhaven
National Laboratory; Upton, New York 11973, United States
| | - G. Lawrence Carr
- National
Synchrotron Light Source II, Brookhaven
National Laboratory; Upton, New York 11973, United States
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Ozyigit D, Ullah F, Gulsaran A, Bastug Azer B, Shahin A, Musselman K, Bajcsy M, Yavuz M. Manufacturing of quantum-tunneling MIM nanodiodes via rapid atmospheric CVD in terahertz band. Sci Rep 2023; 13:20733. [PMID: 38007559 PMCID: PMC10676383 DOI: 10.1038/s41598-023-47775-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 11/18/2023] [Indexed: 11/27/2023] Open
Abstract
Quantum-tunneling metal-insulator-metal (MIM) diodes have emerged as a significant area of study in the field of materials science and electronics. Our previous work demonstrated the successful fabrication of these diodes using atmospheric pressure chemical vapor deposition (AP-CVD), a scalable method that surpasses traditional vacuum-based methods and allows for the fabrication of high-quality Al2O3 films with few pinholes. Here, we show that despite their extremely small size 0.002 µm2, the MIM nanodiodes demonstrate low resistance at zero bias. Moreover, we have observed a significant enhancement in resistance by six orders of magnitude compared to our prior work, Additionally, we have achieved a high responsivity of 9 AW-1, along with a theoretical terahertz cut-off frequency of 0.36 THz. Our approach provides an efficient alternative to cleanroom fabrication, opening up new opportunities for manufacturing terahertz-Band devices. The results of our study highlight the practicality and potential of our method in advancing nanoelectronics. This lays the foundation for the development of advanced quantum devices that operate at terahertz frequencies, with potential applications in telecommunications, medical imaging, and security systems.
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Affiliation(s)
- Dogu Ozyigit
- Mechanical and Mechatronics Engineering Department, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
- Waterloo Institute for Nanotechnology (WIN), University of Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - Farman Ullah
- Mechanical and Mechatronics Engineering Department, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
- Waterloo Institute for Nanotechnology (WIN), University of Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - Ahmet Gulsaran
- Mechanical and Mechatronics Engineering Department, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
- Waterloo Institute for Nanotechnology (WIN), University of Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - Bersu Bastug Azer
- Mechanical and Mechatronics Engineering Department, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
- Waterloo Institute for Nanotechnology (WIN), University of Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - Ahmed Shahin
- Mechanical and Mechatronics Engineering Department, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
- Waterloo Institute for Nanotechnology (WIN), University of Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - Kevin Musselman
- Mechanical and Mechatronics Engineering Department, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
- Waterloo Institute for Nanotechnology (WIN), University of Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - Michal Bajcsy
- Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
- Institute for Quantum Computing, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
| | - Mustafa Yavuz
- Mechanical and Mechatronics Engineering Department, University of Waterloo, Waterloo, ON, N2L 3G1, Canada.
- Waterloo Institute for Nanotechnology (WIN), University of Waterloo, Waterloo, ON, N2L 3G1, Canada.
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