Article
Chemistry, Physical
Ruth H. Tichauer, Dmitry Morozov, Ilia Sokolovskii, J. Jussi Toppari, Gerrit Groenhof
Summary: This study uses multiscale molecular dynamics simulations to investigate the relaxation process of polaritons in tetracene molecules strongly coupled to confined light modes. The results indicate that the relaxation involves vibrationally assisted scattering (VAS) and radiative pumping (RP), both driven by the same molecular vibrations through nonadiabatic coupling between dark states and polaritonic states.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Optics
Da-Wei Luo, Xiao-Feng Qian, Ting Yu
Summary: We study the dynamical generation of macroscopic nonlocal entanglements between two remote massive magnon-superconducting-circuit hybrid systems and find that stronger coupling does not necessarily lead to faster entanglement generation. There exists an optimal fiber coupling strength that requires the shortest time to generate maximal entanglement. Our theoretical results indicate the robustness of entanglement generation against noise effects, offering potential applications in various quantum information tasks.
Article
Optics
Devashish Tupkary, Abhishek Dhar, Manas Kulkarni, Archak Purkayastha
Summary: This paper investigates the effects of approximations to the Redfield equation on the physical properties in weak system-bath coupling scenarios with multiple thermal baths. Through analysis, it is found that the existing Lindblad descriptions in the literature universally violate some fundamental requirements, resulting in inaccuracies in leading order populations and coherences as well as violation of local conservation laws.
Article
Materials Science, Multidisciplinary
Pengfei Zhao, Ge Mu, Menglu Chen, Xin Tang
Summary: This study presents a simulation of colloidal quantum dot infrared detectors with monolithically integrated metal wire-grid polarizer and optical cavity. The results demonstrate that these detectors have high extinction ratio and improved light absorption, making them promising for high-performance infrared optoelectronic devices.
Article
Materials Science, Multidisciplinary
Wei Xiong, Jiaojiao Chen, Baolong Fang, Mingfeng Wang, Liu Ye, J. Q. You
Summary: In this study, a method to greatly enhance the interaction between two single NV spins in diamond is proposed. By optimizing the interaction between NV spin and the electromechanical cavity, a strong coupling between the spins is achieved, enabling coherent quantum-information exchange.
Article
Multidisciplinary Sciences
Xiaomeng Liu, J. I. A. Li, Kenji Watanabe, Takashi Taniguchi, James Hone, Bertrand Halperin, Philip Kim, Cory R. Dean
Summary: We have studied the transition between two bosonic quantum condensate phases in a solid-state system using magneto-exciton condensates in graphene double layers.
Article
Multidisciplinary Sciences
Tatsushi Hamaguchi, Tomohiro Makino, Kentaro Hayashi, Jared A. Kearns, Maho Ohara, Maiko Ito, Noriko Kobayashi, Shouetsu Nagane, Koichi Sato, Yuki Nakamura, Yukio Hoshina, Tatsurou Jyoukawa, Takumi Watanabe, Yuichiro Kikuchi, Eiji Nakayama, Rintaro Koda, Noriyuki Futagawa
Summary: We present a self-induced spatially-coherent dot array composed of fourteen units of vertical-cavity surface-emitting modes, which exhibit spatially uniform spectra. By employing a specific cavity design and adding a perpendicular facet on the side, we achieve a wide beam width and narrow emission angle.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Applied
Lena Engel, Sascha Kolatschek, Thomas Herzog, Sergej Vollmer, Michael Jetter, Simone L. Portalupi, Peter Michler
Summary: In this study, the coupling of a truncated Gaussian-shaped microcavity to a quantum dot (QD) was achieved using wet-chemical etching and epitaxial semiconductor overgrowth. Experimental results confirmed the agreement with simulations in terms of cavity modes and their spatial profiles. By tuning the temperature, transitions of a QD inside the cavity between resonance and off resonance were successfully achieved. The Purcell enhancement effect and the single-photon characteristic of the QD were preserved, as evidenced by a reduced decay time and second-order correlation measurements.
APPLIED PHYSICS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Juanjuan Ren, Sebastian Franke, Stephen Hughes
Summary: In this study, a quantized quasinormal mode approach is presented to describe coupled lossy resonators and quantify the quantum coupling parameters. The results show that commonly adopted master equations for such systems are generally not applicable, but using quantized quasinormal mode-coupling parameters can capture new physics phenomena.
Article
Astronomy & Astrophysics
Daniel Grimmer, Bruno de S. L. Torres, Eduardo Martin-Martinez
Summary: In this work, we compare the AQFT-based Fewster-Verch framework with the commonly used Unruh-DeWitt particle detector models in relativistic quantum information and QFT in curved space. We argue that weakly coupled, localized particle detectors are not impeded from harvesting vacuum entanglement despite claims in a recent paper. The mixedness resulting from entanglement with quantum fields outside the localization area is deemed negligible for realistic scales of localization for physical particle detectors.
Article
Nanoscience & Nanotechnology
Yulu He, Jin Chen, Renming Liu, Yulong Weng, Cong Zhang, Yanmin Kuang, Xiaojuan Wang, Lijun Guo, Xia Ran
Summary: This study reports the suppressed blinking, enhanced radiative rate, and polarization-dependent emission properties of single ZnCdSe/ZnS QDs assembled on the surface of Au nanorods. The local surface plasmon (LSP) of Au nanorods significantly regulates the excitation and emission properties of the composite QD-Au NRs.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Justin Malave, Yetmgeta S. Aklilu, Matthew Beutel, Chenhang Huang, Kalman Varga
Summary: The energy and wave function of a harmonically confined N-electron system coupled to light is calculated by separating the wave functions of the relative and center-of-mass motions. The approach works for any coupling strength, and the effective coupling strength can be increased by increasing the number of electrons, providing an extra degree of freedom to fine tune the resonances and other properties of light-matter coupled systems. Examples of wave functions of light-matter hybrid states are presented.
Article
Physics, Applied
Ramachandrarao Yalla, K. Muhammed Shafi, Kali P. Nayak, Kohzo Hakuta
Summary: In this study, we demonstrate the creation of a one-sided cavity on an optical nanofiber using a composite method. The one-sided composite cavity is designed to enhance channeling efficiency and its coupling characteristics are validated through numerical simulations and experiments.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Youngsin Park, Guanhua Ying, Atanu Jana, Vitaly Osokin, Claudius C. Kocher, Tristan Farrow, Robert A. Taylor, Kwang S. Kim
Summary: This study focuses on the observation and control of transverse electromagnetic (TEM) modes in inorganic perovskite lasers, demonstrating the tuning of emission wavelength through pump power and temperature. The research highlights the ability to maintain a constant full width at half maximum (FWHM) without mode-hopping over the entire tuning range.
Article
Physics, Multidisciplinary
Andreas Fring, Rebecca Tenney
Summary: The study proposes a perturbative method to determine the time-dependent Dyson map and metric operator associated with time-dependent non-Hermitian Hamiltonians. By applying the method to different systems, it demonstrates a recursive constructive approach to solving coupled differential equations and reveals a set of inequivalent solutions for the Dyson maps and metric operators, leading to different physical behavior.
Article
Physics, Applied
Masato Takiguchi, Guoqiang Zhang, Satoshi Sasaki, Kengo Nozaki, Edward Chen, Kouta Tateno, Takehiko Tawara, Akihiko Shinya, Hideki Gotoh, Masaya Notomi
APPLIED PHYSICS LETTERS
(2018)
Editorial Material
Physics, Applied
Hiroyuki Kageshima, Takuji Hosoi, Satoshi Iwamoto, Takayuki Arie, Masahisa Fujino, Yuzo Fukuzaki, Syunta Harada, Masashi Ikegami, Noriyuki Iwamuro, Koh Johguchi, Kuniyuki Kakushima, Haruichi Kanaya, Akihiko Kikuchi, Kentaro Kinoshita, Rihito Kuroda, Yasuyoshi Kurokawa, Kenzo Maehashi, Keiichi Maekawa, Toshiharu Makino, Toshinori Matsushima, Toshitaka Miyata, Hiroshi Morioka, Hiroshi Morioka, Mariappan Murugesan, Kosuke Nagashio, Takahiro Nagata, Osamu Nakatsuka, Nobuhiko Nishiyama, Akira Oiwa, Hiroyuki Okada, Teruo Ono, Toshitsugu Sakamoto, Toshiya Sakata, Mizuki Shirao, Kazuo Sukegawa, Toshikazu Suzuki, Hidetoshi Suzuki, Tetsuya Taima, Tetsu Tanaka, Kohichi Tatsuoka, Takehiko Tawara, Kunio Tsuda, Kazuhiko Yamamoto
JAPANESE JOURNAL OF APPLIED PHYSICS
(2018)
Article
Physics, Multidisciplinary
Ryuichi Ohta, Hajime Okamoto, Takehiko Tawara, Hideki Gotoh, Hiroshi Yamaguchi
PHYSICAL REVIEW LETTERS
(2018)
Article
Chemistry, Multidisciplinary
Satoru Adachi, Yoshihiro Kawakami, Reina Kaji, Takehiko Tawara, Hiroo Omi
APPLIED SCIENCES-BASEL
(2018)
Article
Materials Science, Multidisciplinary
Tomohiro Inaba, Takehiko Tawara, Hiroo Omi, Hideki Yamamoto, Hideki Gotoh
OPTICAL MATERIALS EXPRESS
(2018)
Article
Multidisciplinary Sciences
Guoqiang Zhang, Masato Takiguchi, Kouta Tateno, Takehiko Tawara, Masaya Notomi, Hideki Gotoh
Article
Optics
Masaya Hiraishi, Mark IJspeert, Takehiko Tawara, Satoru Adachi, Reina Kaji, Hiroo Omi, Hideki Gotoh
Article
Optics
Xuejun Xu, Viviana Fili, Wojciech Szuba, Masaya Hiraishi, Tomohiro Inaba, Takehiko Tawara, Hiroo Omi, Hideki Gotoh
Article
Physics, Applied
Guoqiang Zhang, Dominika Gnatek, Masato Takiguchi, Xuejun Xu, Kouta Tateno, Satoshi Sasaki, Takehiko Tawara, Hideki Gotoh
JAPANESE JOURNAL OF APPLIED PHYSICS
(2020)
Article
Physics, Multidisciplinary
Ryuichi Ohta, Loic Herpin, Victor M. Bastidas, Takehiko Tawara, Hiroshi Yamaguchi, Hajime Okamoto
Summary: The study demonstrates a strain-mediated interaction between phonons and telecom photons using erbium ions in a mechanical resonator. Due to the long-lived nature of rare-earth ions, the dissipation rate of the optical resonance falls below that of the mechanical one, achieving a reversed dissipation regime in the optical frequency region. The interaction leads to stimulated excitation of erbium ions and the potential for single-photon strong coupling exceeding the dissipation rates of erbium and mechanical systems.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
S. Yasui, M. Hiraishi, A. Ishizawa, H. Omi, R. Kaji, S. Adachi, T. Tawara
Summary: Precise spectroscopy of the hyperfine level system of Er-167-doped Y2SiO5 was achieved in the frequency domain using an optical frequency comb to stabilize the light source frequency. The method allowed for obtaining a more accurate hole spectrum with a narrow homogeneous linewidth, opening the way for exploring relaxation mechanisms in the frequency domain through simple steady-state measurements.
Article
Optics
Xuejun Xu, Tomohiro Inaba, Tai Tsuchizawa, Atsushi Ishizawa, Haruki Sanada, Takehiko Tawara, Hiroo Omi, Katsuya Oguri, Hideki Gotoh
Summary: Integrated optical amplifiers are crucial for large-scale and complex silicon photonic integrated circuits. A low-loss waveguide platform has been developed based on rare-earth oxide thin films grown on silicon substrates. Optical signal enhancement has been observed in waveguides with high peak enhancement in a wide wavelength range, showcasing progress towards high-performance monolithic-integrated optical amplifiers on silicon.
Article
Optics
S. Yasui, M. Hiraishi, A. Ishizawa, H. Omi, T. Inaba, X. Xu, R. Kaji, S. Adachi, T. Tawara
Summary: By using the 167Er3+:Y2SiO5 hyperfine level system, researchers created high-resolution atomic frequency combs (AFCs) and optimized the pulse sequence for efficient AFC quantum memory. The results show that AFCs with a resolution of 800 kHz can be created using appropriate pump light intensity, achieving an efficiency of 0.16% and a memory time of 0.5 μs even under zero magnetic field and 10 ppm Er concentration.
Article
Materials Science, Multidisciplinary
Ryuichi Ohta, Hajime Okamoto, Takehiko Tawara, Hideki Gotoh, Hiroshi Yamaguchi
Article
Materials Science, Multidisciplinary
Keiko Kato, Yuya Hasegawa, Katsuya Oguri, Takehiko Tawara, Tadashi Nishikawa, Hideki Gotoh
