Article
Optics
Jie Liao, Lan Yang
Summary: Temperature measurement using optical barcodes from whispering-gallery sensors can be greatly improved by simultaneously monitoring different modes of optical signals. This technique overcomes limitations of existing single-mode sensors, providing high-precision and large-dynamic-range temperature measurements.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Jun Ruan, Dan Guo, Ben Niu, Kun Ge, Tianrui Zhai
Summary: This study proposes a gravity-assisted rotatory drawing method for fabricating multicolor lasing microfibers and weaving them into flexible textiles. Full-color tunable lasing textiles can be achieved by regulating the doped dyes and solution viscosity. Furthermore, nanoparticle patterns are printed on the lasing textile for anticounterfeiting application.
NPG ASIA MATERIALS
(2022)
Review
Optics
Yaxun Zhang, Qinghao Song, Danni Zhao, Xiaoyun Tang, Yu Zhang, Zhihai Liu, Libo Yuan
Summary: This paper briefly reviews several coupling methods related to WGM and introduces their applications. It is hoped that this research will contribute to a clearer understanding of the coupling methods.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Jieya Wu, D. N. Wang, C. L. Zhao
Summary: A whispering gallery mode microsphere resonator based on dual microspheres embedded in an expanded hollow sphere cavity is proposed and demonstrated. The device has a high quality factor and multiple asymmetric Fano resonance lines. It is compact, low-cost, easy to fabricate, and convenient to operate.
OPTICS AND LASER TECHNOLOGY
(2023)
Review
Optics
Lu Cai, Shang-wen Li, Fu-cheng Xiang, Jun Liu, Qiang Liu
Summary: This paper provides a detailed introduction to the various resonance phenomena in microcavities and their applications in physics, chemistry, and biology detection. It particularly focuses on the role of Fano resonance in improving sensing performance and the interference effect observed in the spectrum. The theoretical mechanism of Fano resonance is analyzed and the current methods and applications of Fano resonance in microcavities are summarized. Finally, the existing problems and development prospects of this sensor are discussed.
OPTICS AND LASER TECHNOLOGY
(2023)
Review
Chemistry, Analytical
Xuyang Zhao, Zhihe Guo, Yi Zhou, Junhong Guo, Zhiran Liu, Yuxiang Li, Man Luo, Xiang Wu
Summary: This article reviews the advantages and applications of whispering-gallery-mode (WGM) microbubble resonators as optical sensors. It discusses their potential for chemical and biological sensing, as well as physical sensing. The challenges of rapid production and practical applications of WGM microbubble resonators are also addressed.
Article
Optics
Xiaolei Hao, Shiyuan Zhao, Jingjing Gao, Liujia Suo
Summary: In this research, a novel all-optical tunable microlaser based on a polymer-coated microcavity embedded with a high-efficiency nanoheater is proposed. The large refractive index contrast between polymer and air allows for whispering gallery mode (WGM) resonances, enabling lasing from polymer microshells via total internal reflection. By using a Nd3+ heavily doped NaGdF4 nanocrystal (NC) as a nanoscale heat source, a maximum photothermal conversion efficiency of 82.9% is achieved under the continuous triggering of a 793 nm laser. The nanoheater, doped into the silica core by infrared laser ablation, enables the coated microcavity to maintain a high Q factor up to 1.6 x 106, and significant heat transfer is achieved through the absorption of the 793 nm trigger light by the nanoheater.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Physical
Jun Ruan, Dan Guo, Kun Ge, Zhiyang Xu, Fangyuan Liu, Tianrui Zhai
Summary: By inkjet printing high-refractive-index nanoparticles on the designated position of lasing microfiber arrays, the effective refractive index of the microcavities can be regulated, allowing for a simple encoding process to be conducted within a short period of time. Additionally, encapsulating the encoded microfiber arrays in polydimethylsiloxane reduces scattering loss and environmental interference, leading to the realization of a printable encryption chip.
Article
Optics
Jiaxin Li, D. N. Wang
Summary: This study proposes a robust whispering-gallery-mode resonator based on a microsphere embedded in an etched cavity. A slightly tapered multimode fiber with a flat end is inserted inside the cavity to fix the position of the microsphere, and the whole device is protected by a section of hollow fiber. The device is compact, stable, and highly robust.
Article
Optics
Weiguo Weng, Xin Wang, Ke Tian, Dejun Liu, Yonghong Shao, Haiyan Zhao, Pengfei Wang
Summary: This paper presents the fabrication of Er3+-doped fluorosilicate glass microspheres using the melt quenching and fiber heating technique, and demonstrates their low threshold power and temperature sensing capabilities.
JOURNAL OF LUMINESCENCE
(2024)
Article
Materials Science, Multidisciplinary
Farhan Azeem, Luke S. Trainor, Ang Gao, Maya Isarov, Dmitry Strekalov, Harald G. L. Schwefel
Summary: Titanium doped sapphire (Ti:sapphire) is a laser gain material with broad gain bandwidth, and by using a high-quality whispering gallery mode resonator, the laser threshold can be reduced and the slope efficiency can be increased. Furthermore, introducing a probe laser to evaluate the gain can improve the Q value of the modes. These findings provide new possibilities for the implementation of compact Ti:sapphire lasers.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Physics, Multidisciplinary
Elisa Will, Luke Masters, Arno Rauschenbeutel, Michael Scheucher, Juergen Volz
Summary: The study demonstrates trapping of a single Rb-85 atom approximately 200 nm away from the surface of a whispering-gallery-mode bottle microresonator, and shows the observation of vacuum Rabi splitting in the excitation spectrum of the atom-resonator system. This first stable and controlled interaction of a single atom with the whispering-gallery mode in the strong coupling regime has potential for implementing quantum protocols and applications utilizing the chiral atom-light coupling in such resonators.
PHYSICAL REVIEW LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Xiaoyu Tian, Lin Wang, Wei Li, Qianqian Lin, Qiang Cao
Summary: Organic-inorganic halide perovskites exhibit excellent properties in WGM cavities, but the performance of perovskite-based microlasers is limited by the fabrication of microcavities. Researchers have developed a reproducible method combining thermal co-evaporation and femtosecond laser direct writing to create FAPbI(3) polygon-shaped WGM microcavities, and systematically investigated the size- and shape-dependent WGM lasing performances. The results show that FAPbI(3) polygonal microcavities have great potential as promising WGM lasers for practical optoelectronic applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Optics
A. E. Zhukov, N. Kryzhanovskaya, E. Moiseev, M. Maximov
Summary: The paper discusses microlasers with emission spectra determined by whispering gallery modes, utilizing various types of In(Ga)As quantum dots. Deep localization of charge carriers helps overcome undesirable effects, enabling the realization of microlasers capable of operating at elevated temperatures without temperature stabilization.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Optics
H. M. de la Cruz, E. D. Hernandez-Campos, E. Ortiz-Ricardo, A. Martinez-Borquez, I. Rosas-Roman, V. Contreras, G. Ramos-Ortiz, B. Mendoza-Santoyo, Cecilia I. Zurita-Lopez, R. Castro-Beltran
Summary: Acoustic levitation is an important contactless manipulation technique in various fields. This study presents an affordable phased-array levitator that can stably trap micrometer dye-doped droplets in the air, enabling the creation of microlasers. The levitated microlasers exhibit comparable optical lasing features to On-a-Chip devices, with a maximum Q-factor of approximately 105 and a minimum lasing threshold of approximately 150 nJ cm-2.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Nanoscience & Nanotechnology
Ibrahim Tanriover, Doksoo Lee, Wei Chen, Koray Aydin
Summary: Traditional approaches for designing and modeling metasurfaces require accurate simulation methods that are computationally expensive. To overcome this challenge, deep learning-based approaches have emerged as an alternative solution, offering efficient design optimization. However, there are still limitations in terms of design freedom, model generalizability, and fabrication feasibility. In this study, we propose an end-to-end framework that addresses these challenges and enables generative modeling and inverse design of dielectric free-form metasurfaces. We demonstrate the framework's effectiveness through the forward design of a meta-lens and the inverse optimization of a polarization filter and a quarter-wave plate.
Article
Chemistry, Multidisciplinary
Hoang Long Nguyen, Thanh Nhut Do, Emek G. Durmusoglu, Merve Izmir, Ritabrata Sarkar, Sougata Pal, Oleg V. Prezhdo, Hilmi Volkan Demir, Howe-Siang Tan
Summary: In this study, the ultrafast spectral diffusion, vibronic dynamics, and energy relaxation of CdSe colloidal quantum wells (CQWs) at room temperature were measured using two-dimensional electronic spectroscopy (2DES). The energy relaxation from light-hole (LH) excitons to heavy-hole (HH) excitons was observed to occur within a time scale of approximately 210 fs. Equilibration dynamics between the spectroscopically accessible HH excitonic state and a dark state were found to take place within a time scale of approximately 160 fs. The spectral diffusion dynamics in HH excitons were analyzed using center line slope analysis, revealing a sub-200 fs decay and oscillatory features resolved at 4 and 25 meV. Quantum calculations were performed to replicate and explain the observed dynamics. The 4 meV mode was found to be in the near-critically damped regime and may mediate the transition between the bright and dark HH excitons. These findings demonstrate the capability of 2DES to comprehensively and detailedly characterize the ultrafast spectral properties in CQWs and similar nanomaterials.
Article
Chemistry, Multidisciplinary
Farzan Shabani, Pedro Ludwig Hernandez Martinez, Nina Shermet, Hilal Korkut, Ibrahim Sarpkaya, Hamed Dehghanpour Baruj, Savas Delikanli, Furkan Isik, Emek Goksu Durmusoglu, Hilmi Volkan Demir
Summary: This work presents the synthesis and optical characterization of CdSe/CdSeTe/CdTe core/crown/crown nanoplatelets (NPLs) with a stepwise gradient electronic structure. The excitonic properties of the NPLs can be finely tuned through adjusting the geometry of the intermediate crown. These NPLs exhibit long-lifetime red-shifted emission spectra and high two-photon absorption cross-sections, making them promising for designing complex heterostructures with remarkable properties.
Article
Materials Science, Multidisciplinary
Dmitry A. Tatarinov, Sergey S. Anoshkin, Ivan A. Tsibizov, Volodymyr Sheremet, Furkan Isik, Alexey Y. Zhizhchenko, Artem B. Cherepakhin, Aleksandr A. Kuchmizhak, Anatoly P. Pushkarev, Hilmi Volkan Demir, Sergey V. Makarov
Summary: A protocol to deposit large-grain and smooth CsPbBr3 thin films is developed, achieving high optical gain and excellent lasing characteristics. The critical roles of thickness and grain size for CsPbBr3 films with extremely high optical gain are revealed, opening up possibilities for low-threshold lasers and integrated photonic chips.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Roman A. Babunts, Yulia A. Uspenskaya, Nikolai G. Romanov, Sergei B. Orlinskii, Georgy V. Mamin, Elena V. Shornikova, Dmitri R. Yakovlev, Manfred Bayer, Furkan Isik, Sushant Shendre, Savas Delikanli, Hilmi Volkan Demir, Pavel G. Baranov
Summary: Semiconductor colloidal nanoplatelets based on CdSe with magnetic Mn2+ ions show modified magneto-optical and spin-dependent properties. High-frequency electron paramagnetic resonance techniques were used to study the spin structure and dynamics of Mn2+ ions in core/shell CdSe/(Cd,Mn)S nanoplatelets. Two sets of resonances were observed, indicating different spin dynamics between surface and inner Mn2+ ions. The interaction between surface Mn2+ ions and 1H nuclei was measured using electron nuclear double resonance, providing information on the distances between Mn2+ ions and 1H nuclei.
Article
Chemistry, Multidisciplinary
M. A. Masharin, A. K. Samusev, A. A. Bogdanov, I. V. Iorsh, H. V. Demir, S. V. Makarov
Summary: Excitons in lead bromide perovskites have a high binding energy and high oscillator strength, which enables strong light-matter coupling in perovskite-based cavities at the nanoscale. In this study, a perovskite metasurface fabricated with nanoimprint lithography is used to demonstrate room-temperature polariton lasing. The observed lasing emission has a high directivity and compatibility with various planar photonic platforms.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Farzan Shabani, Muhammad Ahmad, Satish Kumar, Savas Delikanli, Furkan Isik, Arinjoy Bhattacharya, Athos Petrou, Hilmi Volkan Demir
Summary: Two-dimensional (2D) core/shell nanoplatelets (NPLs) synthesized via the hot-injection method provide excellent thermal and chemical stability for high-temperature doping. A thermodynamic approach toward silver doping of these NPLs is proposed and demonstrated. The distribution of silver ions in the lattice of the NPLs directly affects the recombination dynamics and enables fine-tuning of the near-infrared emission.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Merve Izmir, Emek G. Durmusoglu, Manoj Sharma, Farzan Shabani, Furkan Isik, Savas Delikanli, Vijay Kumar Sharma, Hilmi Volkan Demir
Summary: In this study, ytterbium (Yb) was successfully doped into cadmium selenide (CdSe) nanoplatelets (NPLs) using a modified seeded-growth method. The Yb-doped NPLs exhibited additional near-infrared (NIR) emission apart from their excitonic emission. By optimizing the dopant concentration, an impressive photoluminescence quantum yield (PL QY) of approximately 55% was achieved. Detailed elemental and optical characterizations were performed to understand the emerging photophysical properties of these Yb-doped NPLs. These lanthanide-doped CdSe NPLs emitting in the NIR range could find applications in next-generation bioimaging, night vision, and photodetection.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Review
Chemistry, Physical
Joanna Dehnel, Adi Harchol, Yahel Barak, Itay Meir, Faris Horani, Arthur Shapiro, Rotem Strassberg, Celso de Mello Donega, Hilmi Volkan Demir, Daniel R. Gamelin, Kusha Sharma, Efrat Lifshitz
Summary: Incorporating magnetic ions into semiconductor nanocrystals is a promising research field for manipulating spin-related properties. Various host materials and magnetic ions have been studied, and the impact of nanostructure engineering and ion selection in carrier-magnetic ion interactions is emphasized. The use of optically detected magnetic resonance spectroscopy provides valuable insights into the spin dynamics and physical parameters of the carrier-magnetic ion interactions.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Optics
Tevfik bulent Kanmaz, Efe Ozturk, Hilmi volkan Demir, Cigdem Gunduz-demir
Summary: This paper proposes and demonstrates a deep-learning-enabled method for rapid prediction of electromagnetic near-field response and inverse prediction of metasurface designs. By using an encoder-decoder neural network, the common limitation of predicting only transmission spectra is overcome.
Article
Nanoscience & Nanotechnology
Itai Carmeli, Ibrahim Tanriover, Tirupathi Malavath, Chanoch Carmeli, Moshik Cohen, Yossi Abulafia, Olga Girshevitz, Shachar Richter, Koray Aydin, Zeev Zalevsky
Summary: This study demonstrates active control of the electric field distribution of a microantenna by coupling localized surface plasmon resonances (LSPRs) with a photosynthetic protein. The hybrid biosolid state platform can tune and modulate the optical activity of the microplasmonic antenna through the interaction of the bioactive material with plasmon oscillations. Furthermore, the coupling effect can be enhanced and controlled by an external potential applied to the microantenna photosynthetic hybrid system. The control of the microantenna electric field distribution by an optical active protein opens the path for future fast optical data processing.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kubra Onbasli, Gozde Demirci, Furkan Isik, Emek Goksu Durmusoglu, Hilmi Volkan Demir, Havva Yagci Acar
Summary: Fluorescent, CdSe/CdS core/crown heterostructured nanoplatelets (NPLs) were transferred to water through a single-step ligand exchange using 2-mercaptopropionic acid. These stable, aqueous NPLs were loaded with a drug, 5-aminolevulinic acid (ALA), and were used for enhanced photodynamic therapy of both androgen-dependent and -independent human prostate cancer cells.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Zeynep Dikmen, Ahmet Tarik Isik, Iklim Bozkaya, Hamed Dehghanpour Baruj, Betul Canimkurbey, Farzan Shabani, Muhammad Ahmad, Hilmi Volkan Demir
Summary: We propose and demonstrate the vertical self-assembly of colloidal quantum wells (CQWs) for amplified spontaneous emission (ASE) and random lasing. The CQWs are stacked in films using liquid-air interface self-assembly (LAISA) and controlled hydrophilicity/lipophilicity balance (HLB). By adjusting HLB with a more lyophilic subphase, large micron-sized areas of monolayer CQW stacks can be obtained. ASE and random lasing are achieved by depositing multi-layered CQW stacks onto a substrate using the Langmuir-Schaefer transfer method.
Article
Chemistry, Multidisciplinary
Taylan Bozkaya, Furkan Isik, Iklim Bozkaya, Savas Delikanli, Emre Unal, Hilmi Volkan Demir
Summary: A new class of light-sensitive nanocrystal skins (LS-NS) utilizing a monolayer of face-down orientation-controlled self-assembled CQWs as the active absorbing layer in the UV-visible range is developed, enabling non-conventional photosensing operation and self-powered operation.
