2
|
LaRiviere B, Ferguson NL, Garman KS, Fisher DA, Jokerst NM. Methods of extraction of optical properties from diffuse reflectance measurements of ex-vivo human colon tissue using thin film silicon photodetector arrays. BIOMEDICAL OPTICS EXPRESS 2019; 10:5703-5715. [PMID: 31799041 PMCID: PMC6865100 DOI: 10.1364/boe.10.005703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 09/23/2019] [Accepted: 09/23/2019] [Indexed: 05/03/2023]
Abstract
Spatially resolved diffuse reflectance spectroscopy (SRDRS) is a promising technique for characterization of colon tissue. Herein, two methods for extracting the reduced scattering and absorption coefficients ( μ s ' ( λ ) and μ a ( λ ) ) from SRDRS data using lookup tables of simulated diffuse reflectance are reported. Experimental measurements of liquid tissue phantoms performed with a custom multi-pixel silicon SRDRS sensor spanning the 450 - 750 nm wavelength range were used to evaluate the extraction methods, demonstrating that the combined use of spatial and spectral data reduces extraction error compared to use of spectral data alone. Additionally, SRDRS measurements of normal and tumor ex-vivo human colon tissue are presented along with μ s ' ( λ ) and μ a ( λ ) extracted from these measurements.
Collapse
Affiliation(s)
- Ben LaRiviere
- Department of Electrical and Computer Engineering, Duke University, Durham, NC 27708, USA
| | | | | | | | - Nan M. Jokerst
- Department of Electrical and Computer Engineering, Duke University, Durham, NC 27708, USA
| |
Collapse
|
3
|
Lariviere B, Garman KS, Ferguson NL, Fisher DA, Jokerst NM. Spatially resolved diffuse reflectance spectroscopy endoscopic sensing with custom Si photodetectors. BIOMEDICAL OPTICS EXPRESS 2018; 9. [PMID: 29541510 PMCID: PMC5846520 DOI: 10.1364/boe.9.001164] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Early detection and surveillance of disease progression in epithelial tissue is key to improving long term patient outcomes for colon and esophageal cancers, which account for nearly a quarter of cancer related mortalities worldwide. Spatially resolved diffuse reflectance spectroscopy (SRDRS) is a non-invasive optical technique to sense biological changes at the cellular and sub-cellular level that occur when normal tissue becomes diseased, and has the potential to significantly improve the current standard of care for endoscopic gastrointestinal (GI) screening. Herein the design, fabrication, and characterization of the first custom SRDRS device to enable endoscopic SRDRS GI tissue characterization using a custom silicon (Si) thin film multi-pixel endoscopic optical sensor (MEOS) is described.
Collapse
Affiliation(s)
- Ben Lariviere
- Department of Electrical and Computer Engineering, Duke University, 101 Science Drive, Durham, NC 27708, USA
| | | | | | | | - Nan M. Jokerst
- Department of Electrical and Computer Engineering, Duke University, 101 Science Drive, Durham, NC 27708, USA
| |
Collapse
|
4
|
Hu W, Huang W, Yang S, Wang X, Jiang Z, Zhu X, Zhou H, Liu H, Zhang Q, Zhuang X, Yang J, Kim DH, Pan A. High-Performance Flexible Photodetectors based on High-Quality Perovskite Thin Films by a Vapor-Solution Method. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29. [PMID: 28991384 DOI: 10.1002/adma.201703256] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2017] [Revised: 07/27/2017] [Indexed: 05/07/2023]
Abstract
Organometal halide perovskites are new light-harvesting materials for lightweight and flexible optoelectronic devices due to their excellent optoelectronic properties and low-temperature process capability. However, the preparation of high-quality perovskite films on flexible substrates has still been a great challenge to date. Here, a novel vapor-solution method is developed to achieve uniform and pinhole-free organometal halide perovskite films on flexible indium tin oxide/poly(ethylene terephthalate) substrates. Based on the as-prepared high-quality perovskite thin films, high-performance flexible photodetectors (PDs) are constructed, which display a nR value of 81 A W-1 at a low working voltage of 1 V, three orders higher than that of previously reported flexible perovskite thin-film PDs. In addition, these flexible PDs exhibit excellent flexural stability and durability under various bending situations with their optoelectronic performance well retained. This breakthrough on the growth of high-quality perovskite thin films opens up a new avenue to develop high-performance flexible optoelectronic devices.
Collapse
Affiliation(s)
- Wei Hu
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, School of Physics and Electronics, Hunan University, Changsha, Hunan, 410082, P. R. China
- Synergetic Innovation Center for Quantum Effects and Application, Hunan Normal University, Changsha, 410081, P. R. China
| | - Wei Huang
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, School of Physics and Electronics, Hunan University, Changsha, Hunan, 410082, P. R. China
- Synergetic Innovation Center for Quantum Effects and Application, Hunan Normal University, Changsha, 410081, P. R. China
| | - Shuzhen Yang
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, School of Physics and Electronics, Hunan University, Changsha, Hunan, 410082, P. R. China
- Synergetic Innovation Center for Quantum Effects and Application, Hunan Normal University, Changsha, 410081, P. R. China
| | - Xiao Wang
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, School of Physics and Electronics, Hunan University, Changsha, Hunan, 410082, P. R. China
- Synergetic Innovation Center for Quantum Effects and Application, Hunan Normal University, Changsha, 410081, P. R. China
| | - Zhenyu Jiang
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, School of Physics and Electronics, Hunan University, Changsha, Hunan, 410082, P. R. China
- Synergetic Innovation Center for Quantum Effects and Application, Hunan Normal University, Changsha, 410081, P. R. China
| | - Xiaoli Zhu
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, School of Physics and Electronics, Hunan University, Changsha, Hunan, 410082, P. R. China
- Synergetic Innovation Center for Quantum Effects and Application, Hunan Normal University, Changsha, 410081, P. R. China
| | - Hong Zhou
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, School of Physics and Electronics, Hunan University, Changsha, Hunan, 410082, P. R. China
- Synergetic Innovation Center for Quantum Effects and Application, Hunan Normal University, Changsha, 410081, P. R. China
| | - Hongjun Liu
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, School of Physics and Electronics, Hunan University, Changsha, Hunan, 410082, P. R. China
- Synergetic Innovation Center for Quantum Effects and Application, Hunan Normal University, Changsha, 410081, P. R. China
| | - Qinglin Zhang
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, School of Physics and Electronics, Hunan University, Changsha, Hunan, 410082, P. R. China
- Synergetic Innovation Center for Quantum Effects and Application, Hunan Normal University, Changsha, 410081, P. R. China
| | - Xiujuan Zhuang
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, School of Physics and Electronics, Hunan University, Changsha, Hunan, 410082, P. R. China
- Synergetic Innovation Center for Quantum Effects and Application, Hunan Normal University, Changsha, 410081, P. R. China
| | - Junliang Yang
- Hunan Key Laboratory for Super-microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha, Hunan, 410083, P. R. China
| | - Dong Ha Kim
- Department of Chemistry and Nano Science, College of Natural Sciences, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Republic of Korea
| | - Anlian Pan
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, School of Physics and Electronics, Hunan University, Changsha, Hunan, 410082, P. R. China
- Synergetic Innovation Center for Quantum Effects and Application, Hunan Normal University, Changsha, 410081, P. R. China
| |
Collapse
|
7
|
Kuo MH, Lai WT, Lee SW, Chen YC, Chang CW, Chang WH, Hsu TM, Li PW. Design of multifold Ge/Si/Ge composite quantum-dot heterostructures for visible to near-infrared photodetection. OPTICS LETTERS 2015; 40:2401-2404. [PMID: 26393750 DOI: 10.1364/ol.40.002401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We demonstrate an effective approach to grow high-quality thin film (>1 μm) of multifold Ge/Si/Ge composite quantum dots (CQDs) stacked heterostructures for near infrared photodetection and optical interconnect applications. An otherwise random, self-assembly of variable-fold Ge/Si CQDs has been grown on Si through the insertion of Si spacer layers to produce micron-scale-thick, stacked Ge/Si CQD layers with desired QD morphology and composition distribution. The high crystalline quality of these multifold Ge CQD heterostructures is evidenced by low dark current density of 3.68 pA/μm2, superior photoresponsivity of 267 and 220 mA/W under 850 and 980 nm illumination, respectively, and very fast temporal response time of 0.24 ns measured on the Ge/Si CQD photodetectors.
Collapse
|