Tootfinder

@ubuntourist@mastodon.social
2025-11-21 16:40:04

Tonight (November 21) Carpe Diem Arts has a Fall of Freedom event from 6:00 PM until 9:00 PM at Seekers Church, Takoma Park across the street from the Takoma Metro (Red Line). More details in comments.
#DC #WashingtonDC

[POSTER] Statue of Liberty torch drawing with red and yellow beams of light.

[CAPTION] Art matters. Courage is contagious. Take Part. Nov. 21.

"Fall of Freedom" is an urgent call to the arts community to unite and activate a nationwid wave of creative resistance (https://falloffreedom.com/)

"Carpe Diem Arts" has long celebrated the experiences, cultures, and identities that shape the fabric of our nation.

Join us FRIDAY, NOVEMBER 21, 6-9 PM, as we lean into the use of "Arts for Social Chang…

@arXiv_physicsoptics_bot@mastoxiv.page
2025-09-23 10:28:10

Machine learning meets Singular Optics II: Single-pixel Detection of Structured Light
Purnesh Singh Badavath, Vijay Kumar
https://arxiv.org/abs/2509.16946 https://

Machine learning meets Singular Optics II: Single-pixel Detection of Structured Light
Structured light beams, including Laguerre-Gaussian (LG), Hermite-Gaussian (HG), and perfect vortex (PV) spatial modes, have been at the forefront of modern optics due to their potential in communications, metrology, and sensing. Traditional recognition methods often demand complex alignments and high-resolution imaging. Speckle-learned recognition (SLR) has emerged as a powerful alternative, exploiting the spatio-temporal speckle fields generated by light-diffuser interactions. This paper buil…

@leftsidestory@mstdn.social
2025-11-18 00:30:02

Urban Adventure 🏞️
城市探险 🏞️
📷Nikon FE
🎞️Fuijfilm NEOPAN SS, expired 1993
#filmphotography #Photography #blackandwhite

Fujifilm NEOPAN SS (FF)

English Alt Text: A black-and-white photo shows dense shrubbery in the foreground with trimmed bushes and a building in the background. The depth of field is shallow, keeping the background sharp while the foreground is softly blurred. The scene feels quiet and urban, with nature partially enclosing a built environment. The contrast between organic textures and structured signage adds visual interest.

中文替代文字：
这张黑白照片前景是茂密的灌木丛，背景是修剪整齐的绿篱和一栋建筑。景深较浅，背景清晰，前景略微模糊。整个场景宁静而城市化，…

Fujifilm NEOPAN SS (FF)

English Alt Text: A black-and-white photo shows the top of a cylindrical modern building partially hidden by dense leafy trees. The building has vertical lines and a rounded top. A vintage-style streetlamp stands on the left. The sky is overcast, casting a soft, diffused light. The contrast between the structured architecture and organic foliage creates a contemplative mood, blending urban and natural elements.

中文替代文字：
这张黑白照片展示一座圆柱形现代建筑的顶部，被茂密的树叶部分遮挡。建筑有垂直线条和圆形顶部。左侧有一个…

Fujifilm NEOPAN SS (FF)

English Alt Text: A black-and-white photo depicts a small outdoor area with a thin, twisted tree in the foreground. Beneath it sits a simple chair with a curved backrest and a table partially visible to the left. A plastic bucket rests under the table. The background features a building wall with a barred window and another window partially seen. The ground is grassy with scattered debris and small plants. The scene blends natural and man-made elements, evoking quiet so…

Fujifilm NEOPAN SS (FF)

English Alt Text: A black-and-white photo captures a person ascending an escalator in a modern architectural space. The person wears a hat and casual clothes, seen from a low angle that emphasizes the steep diagonal of the escalator. The surrounding structure includes glass panels and metal beams, forming strong geometric lines. Light and shadow interplay across the surfaces, adding depth and motion. Another person is partially visible on the right, cropped by the frame…

@hikingdude@mastodon.social
2025-10-03 12:29:31

One more photo stop that we did after quite a rain pour in the #schwarzwald.
We came up this path when I turned around and saw the sun beams through the canopy. At first I was really stunned to be honest as I hardly *ever* see such scenes!
Strangely I took ways less photos than might have been appropriate, but those two I found worth sharing.
Some more story about them:

The image shows the sun shining through a dense forest, with rays of sunlight filtering through the leaves of the trees. The forest is bathed in a warm, golden light, creating a serene and magical atmosphere. The trees are tall and majestic, their dark silhouettes contrasting against the bright sunlight. The scene is peaceful and tranquil, with a hint of mist or fog adding to the ethereal quality of the setting. The colors are predominantly black, with accents of a rich, earthy green. This capt…

The image shows the sun shining through a dense forest, creating a beautiful play of light and shadows. The trees are tall and lush, with the sunlight filtering through the leaves and branches. The atmosphere is serene and peaceful, with a hint of fog adding a mystical touch to the scene. The colors in the image are predominantly black, with accents of a warm golden hue. The overall feel is one of tranquility and harmony with nature, capturing the essence of a morning in an old-growth forest. T…

@blakes7bot@mas.torpidity.net
2025-11-18 10:18:07

Series A, Episode 04 - Time Squad
BLAKE: How long has it been registering?
JENNA: Couple of minutes. Signal's getting stronger.
BLAKE: Zen, visual detector scan and computer analysis on grid one one five, please.
https://blake.torpidity.net/m/104/48 B7B2

Claude Sonnet 4.0 describes the image as: "This image captures a scene from the British science fiction television series "Battlestar Galactica" or similar space-themed production from the late 1970s or early 1980s. The setting appears to be a futuristic spacecraft interior, characterized by angular architectural elements, including a distinctive hexagonal light panel in the background and metallic structural beams.

In the foreground, an actor sits on a curved, cream-colored modernist sofa, le…

@catsalad@infosec.exchange
2025-10-03 13:53:28

Don't forget your daily dose of serotonin

Photo of an orange fluffy cat laying down while surrounded by beams of light in a blue void. Caption says:

serotonin machine

@peterhoneyman@a2mi.social
2025-10-03 04:02:18

that was a really fun night
#deltron3030

This photo captures an energetic live concert in a large indoor venue. The image shows a packed crowd of hundreds of attendees filling the floor space, with people standing densely together facing toward a stage area on the right side of the frame.

The lighting design is spectacular, featuring dramatic beams of colored light - primarily yellow, orange, and some red/pink tones - cutting diagonally across the venue from right to left. These sharp, parallel light beams create a dynamic visual eff…

@iam_jfnklstrm@social.linux.pizza
2025-11-10 09:49:58

@… draw for me An enormous cathedral-like structure made of glass and circuits, symbolizing cloud storage, with beams of light illuminating shelves of glowing data cubes and digital scrolls, ethereal atmosphere, majestic and futuristic design.

@leftsidestory@mstdn.social
2025-12-08 00:30:06

Urbanity - Urbana Composita 🌆
城市化 - 建构城市 🌆
📷 Pentax MX
🎞️ Ilford Pan 100
#filmphotography #Photography #blackandwhite

Ilford Pan 100 (FF)

English Alt Text:
A partially obscured urban scene showing the upper portion of a road or railway overpass. A height restriction sign reading “2.8m” is mounted on a pole in front of the overpass structure. The sign is circular with a bold border, indicating maximum vehicle height. The overpass is made of concrete and steel, with visible support beams. The lower half of the image is covered by a white, jagged-edged area, possibly due to overexposure or image damage. The visi…

Ilford Pan 100 (FF)

English Alt Text:
A black-and-white photo of a shaded public seating area under a pergola-style structure. Several people sit on benches, some using phones, others chatting. The background includes a glass storefront with reflections and Chinese advertisements, one showing a person. Trees cast dappled light on the ground. The scene captures a moment of urban social life, blending architecture, nature, and human interaction.

中文替代文本：
一张黑白照片，展示一个带棚架的公共座椅区。几位市民坐在长椅上，有人使用手机，有人交…

Ilford Pan 100 (FF)
English Alt Text:
A black-and-white image of a traditional Chinese architectural wall. The upper section features a tiled roof with ornate end caps. Beneath the roof is a decorative frieze with repeating patterns. The central focus is a circular stone relief embedded in a brick wall, depicting a detailed scene with human and animal figures, possibly mythological. The relief is framed by a square border with geometric motifs. A translucent plastic sheet partially obscures the…

Ilford Pan 100 (FF)

English Alt Text:
A black-and-white photograph of a quiet urban sidewalk lined with tall trees casting shadows on the path. Several people walk along the sidewalk, including one person holding an umbrella. On the right side, a long row of concrete barriers separates the walkway from a wooded or residential area. The scene evokes a calm, everyday moment in a city, with natural light filtering through the trees and people moving at a relaxed pace.

中文替代文本：
一张黑白照片，展示一条安静的城市人行道…

@cosmos4u@scicomm.xyz
2025-12-10 00:43:00

Search for light sterile neutrinos with two #neutrino beams at MicroBooNE: https://www.nature.com/articles/s41586-025-09757-7 -> No evidence of sterile neutrinos: https://mediarelations.unibe.ch/media_releases/2025/media_releases_2025/sterile_neutrinos/index_eng.html

@toxi@mastodon.thi.ng
2025-11-03 17:45:08

The unforgettable evening light & hike on the day I resigned from my job back in 2021...
#MonochromeMonday #MountainMonday #BlackAndWhite

High contrast black & white photo of an alpine mountain landscape and rugged ridge line in bright hazy evening light, seen from a summit cliff on said ridge. Incredible depth layering, god beams, lens flares. The slopes below the cliffs are covered in forest, in the background only visible as silhouettes.

@jom@social.kontrollapparat.de
2025-11-03 09:55:13

I'm at the Alasca Cloud summit in Dresden today. Feel free to come say hi! #Alasca #Cloud

A presentation in a modern conference hall: A person is speaking at a lectern in front of a packed audience, with a large screen behind them showing a slide titled "OSS Virtualization & IaaS" along with a schematic diagram of open-source cloud infrastructure. To the right and left are information boards and exhibition booths with green light accents, and several empty chairs are waiting on the stage for a panel discussion. The high, bright room with metal beams, hanging spotlights, and slender …

@leftsidestory@mstdn.social
2025-10-17 02:24:17

Moody Urbanity - Odes 🎶
情绪化城市 - 颂 🎶
📷 Zeiss Super Ikonta 533/16
🎞️ Ilford HP5 Plus, expired 1993
#filmphotography #Photography #blackandwhite

Ilford HP5 Plus 400 (6x6)

English Alt Text:
A black and white photo captures a city street running beneath a low overpass with a clearance sign reading “2.5m.” Two people ride bicycles or electric scooters—one holds an umbrella while moving. A car travels alongside them. The overpass has a stone wall and metal railings. In the distance, tall buildings and construction cranes suggest ongoing urban development. The monochrome tone adds a timeless, documentary feel. The scene reflects everyday ci…

Ilford HP5 Plus 400 (6x6)

English Alt Text:
A contemplative black and white image shows a person standing at a crosswalk beneath an overpass. The person faces away from the camera, hands clasped behind their back, wearing a jacket. Shadows from the bridge create dramatic contrast on the pavement. In the background, several pedestrians and cars move through the urban setting. The photo evokes solitude and reflection, with strong light and shadow interplay.

中文替代文字：
这张黑白照片展现了一位行人站在高架桥下的斑马线上，背对镜头…

Ilford HP5 Plus 400 (6x6)

English Alt Text:
A black and white photo of a modern building interior with a high, angled glass ceiling supported by geometric beams. Natural light floods the space. On a mezzanine level, people sit at round tables, possibly in a café or lounge. The word “PURE” is visible on the right wall. Through the large windows, tall buildings suggest an urban setting. The architectural design and relaxed atmosphere contrast with the city outside.

中文替代文字：
这张黑白照片展示了一座现代建筑的内部，高耸…

Ilford HP5 Plus 400 (6x6)

English Alt Text:
A black and white photo of a quiet bus stop beside a multi-lane road. The bus stop sign features Chinese characters and an information board mounted on a tall pole. A white metal fence lines the road, with trees and a wall in the background. No vehicles or people are visible. Sunlight casts shadows on the sidewalk, adding depth. The grainy texture and monochrome palette give the image a nostalgic, historical feel.

中文替代文字：
这是一张黑白照片，描绘了一个安静的公交车站，位于多车道…

@arXiv_physicsaccph_bot@mastoxiv.page
2025-10-14 08:24:28

A Beamdump Facility at Jefferson Lab
Patrick Achenbach, Andrei Afanasev, Pawel Ambrozewicz, Adi Ashkenazi, Dipanwita Banerjee, Marco Battaglieri, Jay Benesch, Mariangela Bondi, Paul Brindza, Alexandre Camsonne, Eric M. Christy, Ethan W. Cline, Chris Cuevas, Jens Dilling, Luca Doria, Stuart Fegan, Marco Filippini, Antonino Fulci, Simona Giovannella, Stefano Grazzi, Heather Jackson, Douglas Higinbotham, Cynthia Keppel, Vladimir Khachatryan, Michael Kohl, Hanjie Liu, Zhen Liu, Camillo Mar…

A Beamdump Facility at Jefferson Lab
This White Paper is exploring the potential of intense secondary muon, neutrino, and (hypothetical) light dark matter beams produced in interactions of high-intensity electron beams with beam dumps. Light dark matter searches with the approved Beam Dump eXperiment (BDX) are driving the realization of a new underground vault at Jefferson Lab that could be extended to a Beamdump Facility with minimal additional installations. The paper summarizes contributions and discussions from the Internation…

@arXiv_nuclex_bot@mastoxiv.page
2025-09-29 08:04:47

Fusion of 12C 28Si at deep sub-barrier energies
A. M. Stefanini, G. Montagnoli, M. Del Fabbro, A. Goasduff, P. A. Aguilera Jorquera, G. Andreetta, F. Angelini, L. V. DAuria, M. Balogh, D. Bazzacco, J. Benito, G. Benzoni, M. A. Bentley, N. Bez, A. Bonhomme, S. Bottoni, A. Bracco, D. Brugnara, L. Busak, S. Capra, S. Carollo, S. Casans, E. Clement, P. Cocconi, A. Cogo, G. Colucci, A. Conte, E. Coradin, L. Corradi, S. Courtin, G. DeAngelis, J. M. Deltoro, G. Del Piero, R. Depalo, J. Dudoue…

Fusion of 12C+28Si at deep sub-barrier energies
The existence of fusion hindrance is not well established in light heavy-ion systems. Studying slightly heavier cases allows extrapolating the trend to light systems of astrophysical interest. Fusion of 12C + 28Si has been measured down to deep sub-barrier energies, using 28Si beams from the XTU Tandem accelerator of LNL on thin 12C targets. The fusion-evaporation residues were detected by a detector telescope following an electrostatic beam separator, and coincidences between the gamma-ray arr…

@leftsidestory@mstdn.social
2025-10-09 00:30:01

Moody Urbanity - UP 🆙
情绪化城市 - 上面 🆙
📷 Nikon FE
🎞️ Ilford HP5 Plus 400, expired 1993
#filmphotography #Photography #blackandwhite

Ilford HP5 Plus 400 (FF)

English Alt Text:
A black-and-white photograph of a modern architectural interior. Tall vertical windows with metal frames allow sunlight to stream in, casting sharp shadows on rough concrete walls and beams. The space feels industrial and geometric, with strong lines and textures. Recessed ceiling lights are arranged in neat rows, adding to the clean, structured aesthetic. The interplay of light and shadow emphasizes the raw materials and creates a dramatic, contempla…

Ilford HP5 Plus 400 (FF)

English Alt Text:
A black-and-white photo taken from a low angle, looking up at the sky. On the right, a building with curved and angular architectural features is partially visible. Tree branches and leaves form dark silhouettes across the frame, adding depth and framing the scene. The sky is faintly speckled with light, possibly stars. The image evokes a quiet, introspective mood through its contrast of nature and structure.

中文替代文字：
这是一张黑白照片，从低角度仰望天空。画面右侧是一座建筑，轮廓曲线与…

Ilford HP5 Plus 400 (FF)

English Alt Text:
A black-and-white cityscape showing contrast between old and new. In the foreground, a traditional tiled roof with weathered texture suggests historical architecture. A leafy tree partially obscures the view. In the background, sleek high-rise buildings tower above, representing modern urban development. The image captures the coexistence of heritage and progress in a single frame.

中文替代文字：
这张黑白城市风景照展现了传统与现代的对比。前景是一座传统瓦屋顶，瓦片斑驳，透露出历史的痕迹。右侧有一棵树，枝叶茂密，部分遮…

Ilford HP5 Plus 400 (FF)

English Alt Text:
A black-and-white photograph of a bustling city street. Mid-rise buildings with balconies line the right side, while an elevated structure casts shadows on the left. Cars, scooters, and pedestrians fill the scene, some carrying umbrellas. A tall streetlamp stands prominently in the foreground. The image captures the energy and density of urban life, with layered architecture and movement throughout.

中文替代文字：
这张黑白照片描绘了一个繁忙的城市街景。右侧是一排带阳台的中高层建筑，左侧则有一座高架结…

@arXiv_physicsoptics_bot@mastoxiv.page
2025-10-08 08:57:19

Mapping complex optical light field distributions with single fluorescent molecules
Daniel Marx, Ivan Gligonov, David Malsbenden, Dominik W\"oll, Oleksii Nevskyi, J\"org Enderlein
https://arxiv.org/abs/2510.05791

Mapping complex optical light field distributions with single fluorescent molecules
Single fluorescent molecules, behaving as ideal electric dipole emitters, are powerful nanoscopic probes of complex optical fields. Here, this property is exploited to precisely map the polarization and vectorial structure of tightly focused laser beams, utilizing both linear and circular polarization states. The resulting three-dimensional fluorescence excitation maps strikingly reveal the intrinsic chiral and non-chiral structure of the light field, in perfect quantitative agreement with a fu…

@UP8@mastodon.social
2025-10-25 22:09:22

🪮 Powerful and precise multi-color lasers now fit on a single chip
#laser

Powerful and precise multi-color lasers now fit on a single chip
A few years ago, researchers in Michal Lipson's lab noticed something remarkable. They were working on a project to improve LiDAR, a technology that uses lightwaves to measure distance. The lab was designing high-power chips that could produce brighter beams of light.

@leftsidestory@mstdn.social
2025-12-06 00:30:00

Moody Urbanity - Old & New VI 🔆
情绪化城市 - 新与旧 VI 🔆
📷 Zeiss Ikon Super Ikonta 533/16
🎞️ Ilford HP5 Plus 400, expired 1993
#filmphotography #Photography #blackandwhite

Ilford HP5 Plus 400 (6x6)

English Alt Text: A black and white image captures the interior of a large building with an arched ceiling and tall windows on the left. The ceiling appears weathered, with visible streaks and patches. On the right wall near the ceiling, large Chinese characters are painted, suggesting cultural or historical significance. The architecture hints at a public space, possibly a train station or hall in a Chinese-speaking region.

中文替代文字：这是一张黑白照片，展示一座大型建筑的内部，拱形天花板高耸，左侧排列着…

Ilford HP5 Plus 400 (6x6)

English Alt Text: A gritty black and white photo shows an urban scene with a brick wall, an industrial-style hanging light, and a metal ceiling structure with beams. A balcony with vertical railings is visible above. On the right side of the wall, Chinese characters read “Non-existent” adding a personal or rebellious tone. The image blends industrial architecture with expressive street art.

中文替代文字：这是一张黑白照片，画面呈现都市风格：砖墙、工业风吊灯和带有横梁的金属天花板结构。上方可见带有垂直栏杆的阳台。墙右侧写有中文“莫须有”，传达…

Ilford HP5 Plus 400 (6x6)

English Alt Text: A black and white photograph features a metal abstract sculpture in the foreground, composed of twisted tubular forms resembling horns or funnels. Behind it stands a tall industrial chimney, rising vertically into a grainy sky. Trees surround the sculpture, adding contrast between nature, art, and industry. The sculpture’s flowing shapes juxtapose the rigid geometry of the chimney, creating a visual tension between creativity and functionality.

中文替代…

Ilford HP5 Plus 400 (6x6)

English Alt Text: A black and white photo shows a statue of a person wearing a full-body protective suit with a hood, standing on top of a building by the side of a tall industrial chimney. The perspective is from below, emphasizing the towering height of the chimney. The person’s gear suggests a hazardous or contaminated environment. A metal ladder is attached to the building, reinforcing the industrial setting. The dramatic lighting and monochrome tones evoke a sen…

@leftsidestory@mstdn.social
2025-10-11 01:00:09

Moody Urbanity - Oracles 🈳
情绪化城市 - 谕 🈳
📷 Nikon FE
🎞️ Ilford HP5 Plus 400, expired 1993
#filmphotography #Photography #blackandwhite

Ilford HP5 Plus 400 (FF)

English Alt Text:
A silver Maserati sports car is parked on a brick-paved street beside a wall covered in graffiti. The car has sleek curves, black alloy wheels, and a modern design. The photo is in black and white, giving it a timeless, cinematic feel. Blurred foliage in the foreground adds depth. Another vehicle is partially visible nearby. The contrast between the luxury car and gritty urban surroundings creates a visually compelling scene.

中文替代文字：
一辆银色玛莎拉蒂跑车停在砖铺街道…

Ilford HP5 Plus 400 (FF)

English Alt Text:
A black-and-white photo of a modern indoor space with clean lines and minimalist design. Four people are walking or standing near a wall with built-in shelves filled with books and small objects. The floor is smooth and reflective, and the lighting casts soft shadows. Exposed concrete beams add an industrial touch. The scene feels like a gallery, museum, or bookstore, capturing quiet motion and thoughtful architecture.

中文替代文字：
这是一张黑白照片，展示一个现代室内空间，设计简…

Ilford HP5 Plus 400 (FF)

English Alt Text:
A black-and-white photo of a tree trunk with deeply textured bark. Diagonal shadows from a window frame or similar structure fall across the trunk, creating a striking pattern. Behind the tree is a wall with abstract graffiti or painted shapes, and a sidewalk runs along the base. The sunlight is strong, casting sharp contrasts between light and shadow. The image blends natural and urban elements, emphasizing texture and geometry.

中文替代文字：
这是一张黑白照片，画面中…

@arXiv_physicsoptics_bot@mastoxiv.page
2025-10-07 11:08:42

All-optical nonlinear phase modulation in open semiconductor microcavities
Fedor A. Benimetskiy, Paul M. Walker, Anthony Ellul, Oleksandr Kyriienko, Martina Morassi, Aristide Lema\^itre, Tommi Isoniemi, Maurice S. Skolnick, Jacqueline Bloch, Sylvain Ravets, Dmitry N. Krizhanovskii
https://arxiv.org/abs/2510.04789

All-optical nonlinear phase modulation in open semiconductor microcavities
We report a significant advancement in ultra low power light-by-light phase modulation using open semiconductor microcavities in the strong light-matter coupling regime. We achieve cross-phase modulation of up to 247$\pm$17 mrad per particle between laser beams attenuated to single-photon average intensities. This breakthrough extends the potential for quantum information processing and nonlinear quantum optics in strongly coupled light-matter systems, setting a new benchmark in the field witho…

@leftsidestory@mstdn.social
2025-11-26 00:30:00

Moody Urbanity - Old & New 🔆
情绪化城市 - 新与旧 🔆
📷 Nikon FE
🎞️ Ilford HP5 Plus 400, expired 1993
#filmphotography #Photography #blackandwhite

Ilford HP5 Plus 400 (FF)

English Alt Text: A black and white photograph captures the ornate eaves of a traditional East Asian building, possibly a temple or palace. The upper portion features layered wooden beams with swirling cloud motifs painted in white against a dark background. The craftsmanship is intricate, with carved brackets and hanging decorative elements. The lower part of the image fades into soft focus, showing rounded roof tiles typical of classical Chinese or Japanese architect…

Ilford HP5 Plus 400 (FF)

English Alt Text: A monochrome close-up photograph of traditional Chinese roof tiles, focusing on the circular end caps. Each tile end is embossed with intricate patterns, possibly floral or symbolic motifs, representing cultural heritage. The tiles are arranged in a neat row, their textures highlighted by soft lighting. The image emphasizes craftsmanship and the tactile beauty of ancient architectural elements.

中文替代文字：
这是一张黑白特写照片，聚焦于中国传统屋顶瓦片的圆形瓦当。每个瓦当上都雕刻着精美图案，可能是花卉或…

Ilford HP5 Plus 400 (FF)

English Alt Text: A black and white photo of a single bicycle parked against a textured brick wall. The bicycle has curved handlebars and a front basket. Sunlight filters through unseen leaves, casting dappled shadows across the wall and ground. The scene evokes a quiet, nostalgic urban moment, with vintage tones and a sense of stillness.

中文替代文字：
这是一张黑白照片，一辆自行车停靠在有纹理的砖墙前。自行车配有弯曲的车把和前置篮筐。阳光透过树叶洒下，在墙面和地面上形成斑驳的光影。画面营造出一种宁静而怀旧的城市氛围，充满复古色调和静谧感。

Ilford HP5 Plus 400 (FF)

English Alt Text: A black and white close-up of two bicycles partially visible in front of a brick wall. One bicycle’s seat and rear wheel dominate the foreground, while the second bicycle’s front wheel and frame peek in from the right. The brick wall is textured and bathed in soft light and shadow. The image conveys a quiet urban scene with a vintage, contemplative mood.

中文替代文字：
这是一张黑白特写照片，两辆自行车部分出现在砖墙前。一辆自行车的座椅和后轮位于画面前景，另一辆的前轮和车架从右侧探出。砖墙表面有丰富的纹理，光影柔和。画面传达出一种宁静的城市氛围，…

@arXiv_physicsoptics_bot@mastoxiv.page
2025-10-09 09:09:11

Can a vector beam be critically coupled leading to perfect absorption?
Sauvik Roy, Nirmalya Ghosh, Ayan Banerjee, Subhasish Dutta Gupta
https://arxiv.org/abs/2510.06822 https://…

Can a vector beam be critically coupled leading to perfect absorption?
Critical coupling has emerged as a prominent area of research in recent years. However, most theoretical models are based on scalar theories (and occasionally coupled mode theories), which inadequately account for the polarization states of the incident light. To bridge this gap, we revisit the concept of critical coupling in planar multilayer structures using a full vectorial theory, where conventional plane wave illumination is replaced by well-defined vector beams with and without orbital an…

@arXiv_physicsoptics_bot@mastoxiv.page
2025-10-01 10:08:17

Generating topological non-diffracting beams using high quality factor nonlocal metasurfaces
Dongha Kim, Charles Pelzman, Cheng Guo, Olivia Y. Long, Shanhui Fan, Sang Yeon Cho
https://arxiv.org/abs/2509.26142

Generating topological non-diffracting beams using high quality factor nonlocal metasurfaces
Non-diffracting optical beams are essential tools in photonics, enabling robust light transport, super-resolution imaging, and spatiotemporal control. While nonlocal metasurfaces have been proposed for structured-light generation due to their broad angular dispersion and topological characteristics, experimental generation of a non-diffracting beam with nonlocal metasurfaces has not been demonstrated. Here we experimentally realize vortex Bessel beams using a nonlocal metasurface and establish …

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2025-10-02 00:30:00

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