Pub Date : 2022-03-04DOI: 10.1109/WRAP54064.2022.9758310
Chandan Ghorui, A. Chaudhary, P. Kumar, Koalla Rajesh
We report the time domain THz-based optical evaluation of different sized soil samples obtained from the jungle and defense test range of the country. The soil samples testing exercise using reflection mode time-domain terahertz (THz) spectroscopy technique is related to the development of a small range THz radar system. The study helps us to understand the role of soil particles in terms of identifying the presence of minerals /ores including organic and explosives contaminants. The E-M waves between 0.1- 4.0 THz range provide significant information of the soil of different origins in terms of refractive index and absorption coefficients etc.
{"title":"Study of THz time-domain spectroscopy based optical properties and detection of minerals and explosives from soil samples of different origins","authors":"Chandan Ghorui, A. Chaudhary, P. Kumar, Koalla Rajesh","doi":"10.1109/WRAP54064.2022.9758310","DOIUrl":"https://doi.org/10.1109/WRAP54064.2022.9758310","url":null,"abstract":"We report the time domain THz-based optical evaluation of different sized soil samples obtained from the jungle and defense test range of the country. The soil samples testing exercise using reflection mode time-domain terahertz (THz) spectroscopy technique is related to the development of a small range THz radar system. The study helps us to understand the role of soil particles in terms of identifying the presence of minerals /ores including organic and explosives contaminants. The E-M waves between 0.1- 4.0 THz range provide significant information of the soil of different origins in terms of refractive index and absorption coefficients etc.","PeriodicalId":363857,"journal":{"name":"2022 Workshop on Recent Advances in Photonics (WRAP)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123292383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-04DOI: 10.1109/WRAP54064.2022.9758352
Shivangi Dubey, Amarendra Pratap Singh, Abhishek Tiwari, Charu S Tripathi
Technological advancement in warfare has wide inclusion of laser-based weaponry. Implementation of a system which is used for identification, detection and recognition of approaching laser radiation on armored combat vehicles is essential. The paper delineates novel configuration to enhance the accuracy of threat detection. This is ensured by the optical design configuration which will reduce stray light issue in linear array of photodetectors. Parameters affecting the detection of accurate angle of incidence are discussed so as to achieve high angular resolution. The detector array is further analyzed to achieve constant angular resolution over the complete field of view. Designing of the front-end optical system is done in a way that there is linear variation between angle of arrival (AOA) and spatial position of the active area of linear detector array. It also focuses attention on the technological challenges in the designing of opto-electronic beam spotting sensor and any variation in beam parameter due to atmospheric hindrance.
{"title":"Coherent Light Beam Spotting Sensor Optics for the Battlefield Surveillance","authors":"Shivangi Dubey, Amarendra Pratap Singh, Abhishek Tiwari, Charu S Tripathi","doi":"10.1109/WRAP54064.2022.9758352","DOIUrl":"https://doi.org/10.1109/WRAP54064.2022.9758352","url":null,"abstract":"Technological advancement in warfare has wide inclusion of laser-based weaponry. Implementation of a system which is used for identification, detection and recognition of approaching laser radiation on armored combat vehicles is essential. The paper delineates novel configuration to enhance the accuracy of threat detection. This is ensured by the optical design configuration which will reduce stray light issue in linear array of photodetectors. Parameters affecting the detection of accurate angle of incidence are discussed so as to achieve high angular resolution. The detector array is further analyzed to achieve constant angular resolution over the complete field of view. Designing of the front-end optical system is done in a way that there is linear variation between angle of arrival (AOA) and spatial position of the active area of linear detector array. It also focuses attention on the technological challenges in the designing of opto-electronic beam spotting sensor and any variation in beam parameter due to atmospheric hindrance.","PeriodicalId":363857,"journal":{"name":"2022 Workshop on Recent Advances in Photonics (WRAP)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130277200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-04DOI: 10.1109/WRAP54064.2022.9758296
Reshma Beeram, V. S. Vendamani, Venugopal Rao Soma
We present here our work on low cost, flexible filter paper substrate with silver dendrites for trace detection of Rhodamine 6G and an explosive molecule, picric acid using surface enhanced Raman spectroscopy (SERS) with silver dendrites. We have synthesized silver dendrites by a simple method of electroless deposition. With the advantage of these highly branched structures, we could detect R6G and Picric Acid of concentrations 1 pM and100 nM, respectively.
{"title":"Flexible Paper Substrate with Silver Dendrites for Trace Detection of Dye and Explosive Molecules using SERS","authors":"Reshma Beeram, V. S. Vendamani, Venugopal Rao Soma","doi":"10.1109/WRAP54064.2022.9758296","DOIUrl":"https://doi.org/10.1109/WRAP54064.2022.9758296","url":null,"abstract":"We present here our work on low cost, flexible filter paper substrate with silver dendrites for trace detection of Rhodamine 6G and an explosive molecule, picric acid using surface enhanced Raman spectroscopy (SERS) with silver dendrites. We have synthesized silver dendrites by a simple method of electroless deposition. With the advantage of these highly branched structures, we could detect R6G and Picric Acid of concentrations 1 pM and100 nM, respectively.","PeriodicalId":363857,"journal":{"name":"2022 Workshop on Recent Advances in Photonics (WRAP)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131427612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-04DOI: 10.1109/WRAP54064.2022.9758363
A. Maity, Abhishek Kandwal, Apeksha Malviya, Srinivas Munige, Anand Pandey, A. Mishra
We demonstrate a 4-core single mode multi core fiber with a 125μm common cladding diameter. The attenuation coefficient of all 4 cores were ≤ 0.24 dB/km over 45 km length spool at 1550 nm wavelength. The inter-core cross-talk between 4-cores was lower than −25.4 dB over the 45 km spool.
{"title":"125 μm Cladding 4-Core Fiber with Low Inter-core Crosstalk","authors":"A. Maity, Abhishek Kandwal, Apeksha Malviya, Srinivas Munige, Anand Pandey, A. Mishra","doi":"10.1109/WRAP54064.2022.9758363","DOIUrl":"https://doi.org/10.1109/WRAP54064.2022.9758363","url":null,"abstract":"We demonstrate a 4-core single mode multi core fiber with a 125μm common cladding diameter. The attenuation coefficient of all 4 cores were ≤ 0.24 dB/km over 45 km length spool at 1550 nm wavelength. The inter-core cross-talk between 4-cores was lower than −25.4 dB over the 45 km spool.","PeriodicalId":363857,"journal":{"name":"2022 Workshop on Recent Advances in Photonics (WRAP)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131497841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-04DOI: 10.1109/WRAP54064.2022.9758318
Eshita Mukherjee, Jayakumar Pillanagrovi, Dhruv Bhatnagar, S. Dutta-Gupta
The real time monitoring of gold nanoparticles (AuNPs) deposition on a modified surface is experimentally investigated. Reflectance of the substrate is used to monitor the deposition of during the deposition of AuNPs within the microfluidic chamber. The reflectance is strongly dependent on the particle density at a given point and exhibits both dips and peaks. The assembly kinetics are compared for both modified and un-modified surfaces. It is shown that the assembly kinetics can be increased significantly due to the presence of appropriate charge species due to the surface modification.
{"title":"Real time monitoring of assembly of plasmonic nanoparticles on polyelectrolyte coated surfaces","authors":"Eshita Mukherjee, Jayakumar Pillanagrovi, Dhruv Bhatnagar, S. Dutta-Gupta","doi":"10.1109/WRAP54064.2022.9758318","DOIUrl":"https://doi.org/10.1109/WRAP54064.2022.9758318","url":null,"abstract":"The real time monitoring of gold nanoparticles (AuNPs) deposition on a modified surface is experimentally investigated. Reflectance of the substrate is used to monitor the deposition of during the deposition of AuNPs within the microfluidic chamber. The reflectance is strongly dependent on the particle density at a given point and exhibits both dips and peaks. The assembly kinetics are compared for both modified and un-modified surfaces. It is shown that the assembly kinetics can be increased significantly due to the presence of appropriate charge species due to the surface modification.","PeriodicalId":363857,"journal":{"name":"2022 Workshop on Recent Advances in Photonics (WRAP)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130080783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-04DOI: 10.1109/WRAP54064.2022.9758309
Sneha Sharma, V. Chaudhary, D. Kumar
A dual-core photonic crystal fiber carbon dioxide sensor is designed and investigated using COMSOL software. The fiber is having two cores that are separated by another air hole which can act as a sensing region when it is filled with analyte. The sensor is based upon RI principle and CO2 RI varies with various parameters such as temperature, humidity and concentration etc. The different modes of the sensor are determined and RI difference, coupling length of the two cores and sensitivity of the device is presented. The proposed sensor gives a sensitivity of 11250nm/RIU with length 0.5cm.
{"title":"Dual core photonic crystal fiber based carbon dioxide gas sensor","authors":"Sneha Sharma, V. Chaudhary, D. Kumar","doi":"10.1109/WRAP54064.2022.9758309","DOIUrl":"https://doi.org/10.1109/WRAP54064.2022.9758309","url":null,"abstract":"A dual-core photonic crystal fiber carbon dioxide sensor is designed and investigated using COMSOL software. The fiber is having two cores that are separated by another air hole which can act as a sensing region when it is filled with analyte. The sensor is based upon RI principle and CO2 RI varies with various parameters such as temperature, humidity and concentration etc. The different modes of the sensor are determined and RI difference, coupling length of the two cores and sensitivity of the device is presented. The proposed sensor gives a sensitivity of 11250nm/RIU with length 0.5cm.","PeriodicalId":363857,"journal":{"name":"2022 Workshop on Recent Advances in Photonics (WRAP)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127192036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-04DOI: 10.1109/WRAP54064.2022.9758344
Yogesh Kumar Verma, Soumya Kumari, S. Tripathi
Exploiting the large field confinement of transverse magnetic mode in low refractive index region, we proposed and analyze refractometer using narrow width, high index contrast micro-ring resonator. For the waveguide width of 60 nm, a sensitivity of 610 nm/RIU is achieved with figure of merit 228.4 RIU−1 and limit of detection $4.4times 10^{-3}$ in the range of 1.33-1.37 of refractive indices.
{"title":"Refractometry using Large Index Contrast Narrow Width Micro-ring Resonator","authors":"Yogesh Kumar Verma, Soumya Kumari, S. Tripathi","doi":"10.1109/WRAP54064.2022.9758344","DOIUrl":"https://doi.org/10.1109/WRAP54064.2022.9758344","url":null,"abstract":"Exploiting the large field confinement of transverse magnetic mode in low refractive index region, we proposed and analyze refractometer using narrow width, high index contrast micro-ring resonator. For the waveguide width of 60 nm, a sensitivity of 610 nm/RIU is achieved with figure of merit 228.4 RIU−1 and limit of detection $4.4times 10^{-3}$ in the range of 1.33-1.37 of refractive indices.","PeriodicalId":363857,"journal":{"name":"2022 Workshop on Recent Advances in Photonics (WRAP)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125985514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-04DOI: 10.1109/WRAP54064.2022.9758355
Elnaz Pilehvar, E. Amooghorban, M. Moravvej-Farshi
In this paper, we investigate the dispersion and medium effects of non-Hermitian bilayer structures consisting of gain and loss layers on the squeezing property of an obliquely incident squeezed light for s- and p-polarized light, in particular at a discrete set of frequencies for which these structures hold PT-symmetric. For this purpose, we calculate the quadrature squeezing of the output state using the QOEMT. The results show although the squeezing property of the output light is retained for the incident frequency farther from the emission frequency of the gain layer, the output light is not squeezed in the PT-symmetric phase.
{"title":"Propagation of Quantum Squeezed Light through a Non-Hermitian Bilayer: Effective Medium Theory","authors":"Elnaz Pilehvar, E. Amooghorban, M. Moravvej-Farshi","doi":"10.1109/WRAP54064.2022.9758355","DOIUrl":"https://doi.org/10.1109/WRAP54064.2022.9758355","url":null,"abstract":"In this paper, we investigate the dispersion and medium effects of non-Hermitian bilayer structures consisting of gain and loss layers on the squeezing property of an obliquely incident squeezed light for s- and p-polarized light, in particular at a discrete set of frequencies for which these structures hold PT-symmetric. For this purpose, we calculate the quadrature squeezing of the output state using the QOEMT. The results show although the squeezing property of the output light is retained for the incident frequency farther from the emission frequency of the gain layer, the output light is not squeezed in the PT-symmetric phase.","PeriodicalId":363857,"journal":{"name":"2022 Workshop on Recent Advances in Photonics (WRAP)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125429758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-04DOI: 10.1109/WRAP54064.2022.9758242
Seyed Morteza Ebadi
This paper reports the design and simulation results of an ultra-compact multi-peak narrow-band plasmonic absorber in a MIM waveguide. It is observed that by tuning the coupling distance between input port and adjacent triangle, one can easily adjust the resonance wavelengths of absorption spectrum.
{"title":"Highly-Miniaturized Multi-Peak Narrow-Band Plasmonic Absorber based on Triangular Arrays","authors":"Seyed Morteza Ebadi","doi":"10.1109/WRAP54064.2022.9758242","DOIUrl":"https://doi.org/10.1109/WRAP54064.2022.9758242","url":null,"abstract":"This paper reports the design and simulation results of an ultra-compact multi-peak narrow-band plasmonic absorber in a MIM waveguide. It is observed that by tuning the coupling distance between input port and adjacent triangle, one can easily adjust the resonance wavelengths of absorption spectrum.","PeriodicalId":363857,"journal":{"name":"2022 Workshop on Recent Advances in Photonics (WRAP)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126848485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-04DOI: 10.1109/WRAP54064.2022.9758347
Kuldeep Jajoria, C. Jha, A. Chakraborty, Himanshu Shekhar
In this paper, we present the characterization of an FBG sensor to detect ultrasound in the MHz frequency range which is used in biomedical ultrasound. The linearity, sensitivity, and repeatability of the sensor were tested at 1 MHz, 5 MHz, and 10 MHz in the peak acoustic rarefactional pressure range of 0-1.2 MPa. The FBG showed good linearity (R-Squared=0.98), high sensitivity (0.82 V/MPa at 10 MHz), and high repeatability (coefficient of variation ≤ 5.5%). Our results show the potential of FBG sensors to detect ultrasound for biomedical applications.
{"title":"Detection of ultrasound up to 10 MHz frequency using an FBG sensor","authors":"Kuldeep Jajoria, C. Jha, A. Chakraborty, Himanshu Shekhar","doi":"10.1109/WRAP54064.2022.9758347","DOIUrl":"https://doi.org/10.1109/WRAP54064.2022.9758347","url":null,"abstract":"In this paper, we present the characterization of an FBG sensor to detect ultrasound in the MHz frequency range which is used in biomedical ultrasound. The linearity, sensitivity, and repeatability of the sensor were tested at 1 MHz, 5 MHz, and 10 MHz in the peak acoustic rarefactional pressure range of 0-1.2 MPa. The FBG showed good linearity (R-Squared=0.98), high sensitivity (0.82 V/MPa at 10 MHz), and high repeatability (coefficient of variation ≤ 5.5%). Our results show the potential of FBG sensors to detect ultrasound for biomedical applications.","PeriodicalId":363857,"journal":{"name":"2022 Workshop on Recent Advances in Photonics (WRAP)","volume":"49 36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131053091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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